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  • 1
    Electronic Resource
    Electronic Resource
    Distribution and coassociations of selected metals in seals of the Antarctic
    Amsterdam : Elsevier
    Environmental Pollution 83 (1994), S. 341-349 
    Details
    ISSN: 0269-7491
    Keywords: Antarctica ; distribution ; heavy metals ; inter-metal correlation ; seals
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0269-7491(94)90156-2
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  • 2
    Electronic Resource
    Electronic Resource
    Iron content and its relations to the sulphur and titanium contents of epiphytic and terricolous lichens and pine bark in Finland
    Amsterdam : Elsevier
    Environmental Pollution 84 (1994), S. 131-138 
    Details
    ISSN: 0269-7491
    Keywords: air pollution ; bioindicators ; element ratios ; geochemical relations ; heavy metals
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0269-7491(94)90095-7
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  • 3
    Electronic Resource
    Electronic Resource
    Heavy metal concentrations in sediments from Manila Bay, Philippines and inflowing rivers
    Amsterdam : Elsevier
    Environmental Pollution 86 (1994), S. 83-88 
    Details
    ISSN: 0269-7491
    Keywords: Manila Bay ; heavy metals ; historical trend of pollution ; marine sediment ; riverine sediment
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0269-7491(94)90009-4
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  • 4
    Electronic Resource
    Electronic Resource
    Small town lead levels: A case study from the homes of pre-schoolers in Mt. Pleasant, Michigan
    Amsterdam : Elsevier
    Environmental Pollution 84 (1994), S. 159-166 
    Details
    ISSN: 0269-7491
    Keywords: children ; dust ; lead ; pollution ; soil
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0269-7491(94)90099-X
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  • 5
    Electronic Resource
    Electronic Resource
    The impact of climate change on the soil/moisture regime of Scottish mineral soils
    Amsterdam : Elsevier
    Environmental Pollution 83 (1994), S. 245-250 
    Details
    ISSN: 0269-7491
    Keywords: GIS ; climate change ; moisture ; soil
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0269-7491(94)90039-6
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  • 6
    Electronic Resource
    Electronic Resource
    A Risk Assessment for Consumers of Mourning Doves (1998)
    Springer
    Risk analysis 18 (1998), S. 563-573 
    Details
    ISSN: 1539-6924
    Keywords: Risk assessment ; mourning doves ; hunting ; radionuclides ; heavy metals ; lead shot ; cesium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Recreational and subsistence hunters and anglers consume a wide range of species, including birds, mammals, fish and shellfish, some of which represent significant exposure pathways for environmental toxic agents. This study focuses on the Department of Energy's (DOE's) Savannah River Site (SRS), a former nuclear weapons production facility in South Carolina. The potential risk of contaminant intake from consuming mourning doves (Zenaida macroura), the most popular United States game bird, was examined under various risk scenarios. For all of these scenarios we used the mean tissue concentration of six metals (lead, mercury, cadmium, selenium, chromium, manganese) and radiocesium, in doves collected on and near SRS. We also estimated risk to a child consuming doves that had the maximum contaminant level. We used the cancer slope factor for radiocesium, the Environmental Protection Agencies Uptake/Biokinetic model for lead, and published reference doses for the other metals. As a result of our risk assessments we recommend management of water levels in contaminated reservoirs so that lake bed sediments are not exposed to use by gamebirds and other terrestrial wildlife. Particularly, measures should be taken to insure that the hunting public does not have access to such a site. Our data also indicate that doves on popular hunting areas are exposed to excess lead, suggesting that banning lead shot for doves, as has been done for waterfowl, is desirable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/B:RIAN.0000005931.39844.35
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  • 7
    Electronic Resource
    Electronic Resource
    Biodegradation of Injection Molded Starch-Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) Blends in a Natural Compost Environment (1998)
    Springer
    Journal of polymers and the environment 6 (1998), S. 91-98 
    Details
    ISSN: 1572-8900
    Keywords: Starch ; PHBV ; PHA ; plastic ; blends ; biodegradation ; soil ; compost
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Injection molded specimens were prepared by blending poly (hydroxybutyrate-co-valerate) (PHBV) with cornstarch. Blended formulations incorporated 30% or 50% starch in the presence or absence of poly-(ethylene oxide) (PEO), which enhances the adherence of starch granules to PHBV. These formulations were evaluated for their biodegradability in natural compost by measuring changes in physical and chemical properties over a period of 125 days. The degradation of plastic material, as evidenced by weight loss and deterioration in tensile properties, correlated with the amount of starch present in the blends (neat PHBV 〈 30% starch 〈 50% starch). Incorporation of PEO into starch-PHBV blends had little or no effect on the rate of weight loss. Starch in blends degraded faster than PHBV and it accelerated PHBV degradation. Also, PHBV did not retard starch degradation. After 125 days of exposure to compost, neat PHBV lost 7% of its weight (0.056% weight loss/day), while the PHBV component of a 50% starch blend lost 41% of its weight (0.328% weight loss/day). PHB and PHV moieties within the copolymer degraded at similar rates, regardless of the presence of starch, as determined by 1H-NMR spectroscopy. GPC analyses revealed that, while the number average molecular weight (Mn) of PHBV in all exposed samples decreased, there was no significant difference in this decrease between neat PHBV as opposed to PHBV blended with starch. SEM showed homogeneously distributed starch granules embedded in a PHBV matrix, typical of a filler material. Starch granules were rapidly depleted during exposure to compost, increasing the surface area of the PHBV matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022806222158
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  • 8
    Electronic Resource
    Electronic Resource
    Biodegradability of chitin- and chitosan-containing films in soil environment (1995)
    Springer
    Journal of polymers and the environment 3 (1995), S. 31-36 
    Details
    ISSN: 1572-8900
    Keywords: Biodegradation ; chitin ; chitosan ; film ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The biodegradation of polyethylene-chitin (PE-chitin) and polyethylene-chitosan (PE-chitosan) films, containing 10% by weight chitin or chitosan, by pure microbial cultures and in a soil environment was studied. Three soil-inhabited organsims,Serratia marcescens, Pseudomonas aeruginosa, andBeauveria bassiana were able to utilize chitin and chitosan in prepared PE-chitin and PE-chitosan films after eight weeks of incubation at 25°C in a basal medium containing no source of carbon or nitrogen. In a soil environment, the biodegradation of those films was studied and compared with a commercial biodegradable film containing 6% by the weight of corn starch. In soil placed in the lab, 73.4% of the chitosan and 84.7% of the chitin in the films were degraded, while 46.5% of the starch in the commercial film was degraded after six months of incubation. In an open field, 100% of the chitin and 100% of the chitosan in the films were degraded, but only 85% of the starch in the commercial film was degraded after six months of incubation. The weight of controls, (polyethylene films), remained mainly stable during the incubation period. Both PE-chitin and PE-chitosan films degraded at a higher rate than the commercial starch-based film in a soil environment indicating the potential use of chitin-based films for the manufacturing of biodegradable packaging materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067791
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  • 9
    Electronic Resource
    Electronic Resource
    Interactions of bacteria with cadmium (1992)
    Springer
    Biodegradation 3 (1992), S. 161-170 
    Details
    ISSN: 1572-9729
    Keywords: bioremediation ; cadmium ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Cadmium pollution arises mainly from contamination of minerals used in agriculture and from industrial processes. The usual situation is of large volumes of soil and water that are contaminated with low — but significant — concentrations of cadmium. Therefore, detoxification of the polluted water and soil involves the concentration of the metal, or binding it in a way that makes it biologically inert. Cadmium is one of the more toxic metals, that is also carcinogenic and teratogenic. Its effects are short term, even acute (diseases like Itai-itai), or long term. The long term effects are intensified due to the fact that cadmium accumulates in the body. This paper describes a study involving several hundred cadmium-resistant bacterial isolates. These bacteria could be divided into three groups—the largest group consisted of bacteria resistant to cadmium by effluxing it from the cells. The bacteria of the other two groups were capable of binding cadmium or of detoxifying it. We concentrated on one strain that could bind cadmium very efficiently, depending on the bacterial biomass and on the pH. This strain could effectively remove cadmium from contaminated water and soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00129081
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  • 10
    Electronic Resource
    Electronic Resource
    Bioavailability of sorbed- and separate-phase chemicals (1993)
    Springer
    Biodegradation 4 (1993), S. 141-153 
    Details
    ISSN: 1572-9729
    Keywords: bioavailability ; biodegradation ; sorption ; oil ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695116
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  • 11
    Electronic Resource
    Electronic Resource
    Biodegradation of rubber particles in soil (1996)
    Springer
    Biodegradation 7 (1996), S. 329-333 
    Details
    ISSN: 1572-9729
    Keywords: biodegradation ; modelling ; rubber ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The biodegradation of rubber particles in rubber-soil mixtures at different rubber contents was monitored by the carbon dioxide production. The cumulative carbon dioxide production was modelled according to a two parameter exponential function. The model provides an excellent fit (R2〉0.98) for the observed data. The two parameters yield a reliable estimate of the half-life for the process observed, but estimation of the true half-life of rubber in soil will need more research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00115746
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  • 12
    Electronic Resource
    Electronic Resource
    Effect of concentration and environmental form of tetradecenyl succinic acid on its mineralization in soil (1996)
    Springer
    Biodegradation 7 (1996), S. 377-382 
    Details
    ISSN: 1572-9729
    Keywords: bioavailability ; builders ; detergents ; kinetics ; mineralization ; sewage sludge ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Tetradecenyl succinic acid (TSA) is the major component of a detergent builder (C12-C14 alkenyl succinic acid), which is inherently biodegradable. 14C-TSA was dosed as a component of sewage sludge into a soil with a history of sludge amendment at final added concentrations of 1.5 and 30 mg (kg soil)-1. In addition, it was dosed to the soil in an aqueous solution to a final added concentration of 30 mg (kg soil)-1. Dose and form were found to have a pronouced effect on the mineralization kinetics. When dosed in a realistic form and concentration (i.e. 1.5 mg (kg soil)-1 as a component of sludge), TSA was mineralized at its highest rate and to its greatest extent, and the mineralization half-life was 2.4 days. When dosed at 30 mg (kg soil)-1 as a component of sludge, mineralization began immediately, and the half-life was 23 days. In contrast, when dosed at this concentration in aqueous solution, the onset of mineralization was preceded by a 13 day lag period and the mineralization half-life was 69 days. Primary biodegradation and mineralization rates of TSA were very similar. Approximately, half the radioactivity was evolved as 14CO2, while the remaining radioactivity became non-extractable, having presumably been incorporated into biomass or natural soil organic matter (humics). This study demonstrated that TSA is effectively removed from sludge-amended soils as a result of biodegradation. Furthermore, it showed the effect that dose form and concentration have on the biodegradation kinetics and the importance of dosing a chemical not only at a relevant concentration but also in the environmental form in which it enters the soil environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00056421
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  • 13
    Electronic Resource
    Electronic Resource
    Introduction and PCR detection of Desulfomonile tiedjei in soil slurry microcosms (1997)
    Springer
    Biodegradation 8 (1997), S. 125-133 
    Details
    ISSN: 1572-9729
    Keywords: Desulfomonile tiedjei ; soil ; PCR ; reductive dechlorination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The aim of this work was to test the feasibility ofintroducing an anaerobic microbial reductivedechlorination activity into non sterile soil slurrymicrocosms by inoculation with the pure anaerobicbacterial strain Desulfomonile tiedjei, which iscapable of dechlorinating 3-chlorobenzoate tobenzoate. To show that the bacterium was establishedin the microcosms we followed the expression of thereductive dechlorination activity and a molecularprobe based on PCR amplification of the 16S rDNA genewas developed. However, the success of PCRamplification of the 16S rDNA gene depends on the DNAextraction and purification methodologies applied, asshown through the use of several protocols. In thisstudy we report a DNA extraction and purificationmethod which generates sufficient and very clean DNAsuitable for PCR amplification of the D. tiedjei16S rDNA gene. The threshold of detection was about5.103 bacteria per gram of soil slurry.Introduction of D. tiedjei in soil slurrymicrocosms proved successful since 3-chlorobenzoatedechlorination activity was established with thisbacterium in microcosms normally devoid of thisdechlorination capacity. Indeed, the addition of D. tiedjei to microcosms supplemented with acetateplus formate as cosubstrate, at their respectiveconcentrations of 5 and 6 mM, led to a totalbiotransformation of 2.5 mM of 3-chlorobenzoate within12 days. After complete 3-chlorobenzoatedechlorination, the 16S rDNA gene of this bacteriumwas specifically detected only in the inoculatedmicrocosms as shown by PCR amplification followed byrestriction mapping confirmation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008262426800
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  • 14
    Electronic Resource
    Electronic Resource
    Biodegradation of 4-nitrophenol by indigenous microbial populations in Everglades soils (1997)
    Springer
    Biodegradation 8 (1997), S. 349-356 
    Details
    ISSN: 1572-9729
    Keywords: biodegradation ; bioremediation ; acclimation ; Everglades ; mineralization ; nitrophenol ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The Everglades in South Florida are a unique ecologicalsystem. As a result of the widespread use of pesticides andherbicides in agricultural areas upstream from these wetlands,there is a serious potential for pollution problems in theEverglades. The purpose of this study was to evaluate theability of indigenous microbial populations to degradexenobiotic organic compounds introduced by agricultural andother activities. Such biodegradation may facilitate theremediation of contaminated soils and water in the Everglades.The model compound selected in this study is 4-nitrophenol, achemical commonly used in the manufacture of pesticides. Themineralization of 4-nitrophenol at various concentrations wasstudied in soils collected from the Everglades. Atconcentrations of 10 and 100 µg/g soil, considerablemineralization occurred within a week. At a higherconcentration, i.e., 10 mg/g soil, however, no mineralizationof 4-nitrophenol occurred over a 4-month period; such a highconcentration apparently produced an inhibitory effect. Therate and extent of 4-nitrophenol mineralization was enhancedon inoculation with previously isolated nitrophenol-degradingmicroorganisms. The maximum mineralization extent measured,however, was less than 30% suggesting conversion to biomassand/or unidentified intermediate products. These resultsindicate the potential for natural mechanisms to mitigate theadverse effects of xenobiotic pollutants in a complex systemsuch as the Everglades.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008285717595
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  • 15
    Electronic Resource
    Electronic Resource
    An integrated algal sulphate reducing high rate ponding process for the treatment of acid mine drainage wastewaters (1998)
    Springer
    Biodegradation 9 (1998), S. 247-257 
    Details
    ISSN: 1572-9729
    Keywords: acid mine drainage ; algae ; heavy metals ; high rate algal ponds ; sulphate reducing bacteria ; waste stabilisation ponds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Acid mine drainage pollution may be associated with large water volume flows and exceptionally long periods of time over which the drainage may require treatment. While the use and role of sulphate reducing bacteria has been demonstrated in active treatment systems for acid mine drainage remediation, reactor size requirement and the cost and availability of the carbon and electron donor source are factors which constrain process development. Little attention has focussed on the use of waste stabilisation ponding processes for acid mine drainage treatment. Wastewater ponding is a mature technology for the treatment of large water volumes and its use as a basis for appropriate reactor design for acid mine drainage treatment is described including high rates of sulphate reduction and the precipitation of metal sulphides. Together with the co-disposal of organic wastes, algal biomass is generated as an independent carbon source for SRB production. Treatment of tannery effluent in a custom-designed high rate algal ponding process, and its use as a carbon source in the generation and precipitation of metal sulphides, has been demonstrated through piloting to the implementation of a full-scale process.The treatment of both mine drainage and zinc refinery wastewaters are reported. A complementary role for microalgal production in the generation of alkalinity and bioadsorptive removal of metals has been utilised and an Integrated 'Algal Sulphate Reducing Ponding Process for the Treatment of Acidic and Metal Wastewaters' (ASPAM) has been described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008352008353
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  • 16
    Electronic Resource
    Electronic Resource
    Sulfur metabolism in higher plants: potential for phytoremediation (1998)
    Springer
    Biodegradation 9 (1998), S. 311-318 
    Details
    ISSN: 1572-9729
    Keywords: glucosinolates ; gypsum ; heavy metals ; phyto-extraction ; phytoremediation ; sulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Sulfur is a major nutrient for all organisms. Plant species have a high biodiversity in uptake, metabolization and accumulation of sulfur so that there are potentials to use plants for phytoremediation of sulfur-enriched sites. A survey of soils enriched with sulfur either naturally or by human activities shows that a surplus of sulfur is mostly accompanied with a surplus of other chemical elements which may limit phytoremediation because these co-occurring elements are more toxic to plants than sulfur. In addition, the accumulation of the other elements makes the plant material (phyto-extraction) less suitable for the use as fodder and for human consumption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008250827209
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  • 17
    Electronic Resource
    Electronic Resource
    Availability of phosphorus and sulfur of insecticide origin by fungi (1998)
    Springer
    Biodegradation 9 (1998), S. 327-336 
    Details
    ISSN: 1572-9729
    Keywords: fungi ; organophosphate insecticides ; phosphorus mineralization ; sulfur mineralization ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Thirteen fungal species isolated from soil treated with pesticides were tested for their ability to mineralize and degrade three organophosphate insecticides currently used in Egypt (Cyolan®, Malathion® and Dursban®) in liquid media free from phosporus (P) and sulfur (S). All fungal species grew successfully on the culture media treated with the three used doses of insecticides (10, 50 and 100 ppm active ingredient) but the growth rate varied with the species, the insecticide and the doses. At 10 ppm level, insecticide degradation expressed in term of organic P mineralization (calculated as % of applied P) was the highest with all fungi tested. Organic P mineralization from pesticides was decreased by increasing the dose used to 50 and 100 ppm. The highest amount of P mineralized was observed with Cyolan® followed by Malathion® whilst P mineralization from Dursban® proceeded very slowly. Aspergillus terreus showed the greatest potential to mineralize organic P followed by A. tamarii, A. niger, Trichoderma harzianum and Penicillium brevicompactum whilst the remaining fungi only moderately mineralized the organic P component of the insecticides tested. Organic sulfur mineralization by the used fungal species paralleled, to some extent, organic P mineralization. The extracellular protein content of culture filtrates in the presence of various doses of insecticides was also decreased by increasing insecticide concentrations. The extracellular protein was significantly correlated with P and S mineralization (r = 0.89** and 0.64**, respectively) whilst correlation with cell dry mass was not significant (r = 0.03 and 0.003) suggesting a direct relationship between pesticide degradation and microbial protein production. The addition of P or S to the growth media enhanced extracellular protein excretion, and increased organic P and S mineralization by the most potent species tested (A. niger, A. tamarii, A. terreus and T. harzianum). This increment was significant in most cases, especially at the higher application rates. The relationship between extracellular protein excretion and organic P and S mineralization from insecticides was highly significant with the addition of inorganic phosphorus (r = 0.96** and 0.83**, respectively) or sulfur (r = 0.85** and 0.89**, respectively) to the growth media.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008310909262
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  • 18
    Electronic Resource
    Electronic Resource
    Prospects for in vivo NMR methods in xenobiotic research in plants (1998)
    Springer
    Biodegradation 9 (1998), S. 411-422 
    Details
    ISSN: 1572-9729
    Keywords: agrochemicals ; heavy metals ; NMR imaging ; NMR spectroscopy ; subcellular compartmentation xenobiotic metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The application of non-invasive nuclear magnetic resonance (NMR) methods in xenobiotic research is reviewed in relation to: (i) the characterisation of the effects of xenobiotics on the metabolism of plants and plant cell suspensions; (ii) the direct detection of xenobiotics and their degradation products in vivo; and (iii) the spatial localisation of xenobiotics and their derivatives at the subcellular and tissue levels. Novel information has been generated by in vivo NMR studies of both agrochemicals and heavy metals, but a lack of generality in the methods makes it difficult to extrapolate from one successful application to the next. In vivo NMR spectroscopy is shown to be informative when a xenobiotic perturbs metabolic pathways that are accessible to the technique, and it is useful for probing the partitioning of paramagnetic metal ions between the cytoplasm and the vacuole. The successful application of 19F NMR to the analysis of plant tissue extracts also suggests that in vivo 19F NMR spectroscopy may have a role in biotransformation studies of fluorinated xenobiotics. In contrast NMR imaging techniques have been little used for xenobiotic research in plants, and while the method has been shown to be capable of monitoring the uptake and translocation of paramagnetic ions in plants, the potential use of high resolution 1H and 19F NMR imaging for mapping agrochemicals in tissues is still in its infancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008372107739
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  • 19
    Electronic Resource
    Electronic Resource
    Heavy metal bioavailability in a soil affected by mineral sulphides contamination following the mine spillage at Aznalcóllar (Spain) (2003)
    Springer
    Biodegradation 14 (2003), S. 199-205 
    Details
    ISSN: 1572-9729
    Keywords: bioremediation ; heavy metals ; metal availability ; organic matter ; pyrite ; sulphide oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A field experiment, lasting 14 months, was carried out in order to assess the effect of organic amendment and lime addition on the bioavailability of heavy metals in contaminated soils. The experiment took place in a soil affected by acid, highly toxic pyritic waste from the Aznalcóllar mine (Seville, Spain) in April 1998. The following treatments were applied (3 plots per treatment): cow manure, a mature compost, lime (to plots having pH 〈 4), and control without amendment. During the study two crops of Brassica juncea were grown, with two additions of each organic amendment. Throughout the study, the evolution of soil pH, total and available (DTPA-extractable) heavy metals content (Zn, Cu, Mn, Fe, Pb and Cd), electrical conductivity (EC), soluble sulphates and plant growth and heavy metal uptake were followed. The study indicates that: (1) soil acidification, due to the oxidation of metallic sulphides in the soil, increased heavy metal bioavailability; (2) liming succeeded in controlling the soil acidification; and (3) the organic materials generally promoted fixation of heavy metals in non-available soil fractions, with Cu bioavailability being particularly affected by the organic treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1024288505979
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  • 20
    Electronic Resource
    Electronic Resource
    Pinus radiata site quality study in the Basque Country (Spain) using nutritional and physiographical criteria (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 1275-1280 
    Details
    ISSN: 1573-2932
    Keywords: Pinus radiata ; nutrient ; needle ; soil ; principal component analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Nutrient status in Pinus radiata sites in the Basque Country (Spain) have been established. Current-year, 1-year-old needles, and soil samples were collected in 7 sites. Needle samples were analyzed for calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P) and nitrogen (N). Soil samples were analyzed for pH (H2O), N, P, Ca, Mg, K and aluminium (Al). The results indicate differences between sites and needles of different ages. In general, nutrient concentrations in needles are sufficient for the nutritive requirements, but some low concentrations of Mg and P found in 1-year-old needles, indicate that some trees may show signs of deficiency in the near future. In turn, N concentrations are, in many cases, higher than those usually found in this species and may originate growth disorders. These concentrations may be related to NO3 − and NH4 + deposition. Soil nutrients are sufficient for trees requirements, but the levels of K and Mg are low. Soil pH values are not very acid, and the value of the Ca/Al ratio is, in general, near 1. An arrangement of sites and physiographical and nutritional parameters based on correlation and principal component analysis is also presented.
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    URL: http://dx.doi.org/10.1007/BF00477157
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    Soil sensitivity due to acid and heavy metal deposition in East Central Europe (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 737-742 
    Details
    ISSN: 1573-2932
    Keywords: acid deposition ; heavy metals ; cadmium ; soil contamination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Simultaneous soil acidification and deposition of heavy metals is a major concern for forest and agricultural soils of the Black Triangle region of East Central Europe including southern former East Germany, northern Bohemia of the Czech Republic, and southern Poland. The objective of this project was to develop historical and future projections of acid and heavy metal deposition to soils (As, Cd, Pb, Zn) and to produce a preliminary map of soil sensitivity to cadmium pollution and uptake by crops. Ultimately, we wish to assess the relative hazard and recovery times of soils to metals deposition in the region. Emission and deposition data bases obtained from several models developed at IIASA were linked using the Geographical Information System ARC/INFO to produce soil maps of sensitivity to cadmium mobility based on metals deposition, soil type, soil texture, organic matter content, and acid deposition. RAINS 6.1 (Alcamo et al., 1990) was utilized to produce maps of acid deposition for EMEP grids (150 km x 150 km). The largest amount of acid load is deposited in southern East Germany. Sulfur deposition in that area was 10–12 gS/m2/yr in 1990, and S+N deposition exceeded 8000 eq/ha/yr. But the “hot spot” for metals deposition is further to the east, in the Silesia area of southern Poland. The TRACE2 trajectory model of Alcamo, Bartnicki, and Olendrzynski (1992) was used to estimate cumulative metals deposition since 1955 with scenarios to 2010. Pb has improved over Europe since 1970 when depositions in the Ruhr River Valley of West Germany exceeded 60 mg/m2/yr. But cadmium deposition in southern Poland (Katowice and Krakow) has now accumulated to 60–70 mg/m2 by atmospheric deposition alone. During base case simulations from 1955–87, approximately 1.8 mg/kg Pb and 0.12 mg/kg Cd have been added to the mixed plow-layer of ∼30 cm. If these emissions continue indefinitely, the accumulation of metals will become problematic for agriculture and the food chain.
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    URL: http://dx.doi.org/10.1007/BF00476917
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    Factors affecting the content of heavy metals in bulk atmospheric precipitation, throughfall and stemflow in central Bohemia, Czech Republic (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 841-846 
    Details
    ISSN: 1573-2932
    Keywords: Heavy metals ; precipitation ; throughfall ; stemflow ; soil ; metabolic activity ; trees ; uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Content of copper, manganese, lead, and zinc in samples of bulk precipitation, throughfall and stemflow has been studied in a forest area in central Bohemia. The sampling localities are situated on two types of bedrock, granite and cenomaniau sandstones. The content in bulk precipitation reflects the impact of fossil fuel emission sources and the vehicular sources of lead. The deposition rate of elements in throughfall, in comparison with that of the deposition on an open land, exhibits increased values in essential microelements (in Mn approx. 45 times, Zh-5 times, Cu and Cd-2 times), with significant seasonal fluctuations. The value of the same ratio for ecotoxic lead is 0.23. The enhanced flux of elements in throughfall is ascribed mainly to the metabolic processes of the trees. Differences in the chemical composition of throughfall and stemflow collected on stands with different kind of bedrock are ascribed to various degree of accessibility of the micronutrients and various intensity of their vegetation uptake.
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    URL: http://dx.doi.org/10.1007/BF00476934
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    Determining the potential distribution of vegetation, crops and agricultural productivity (1994)
    Springer
    Water, air & soil pollution 76 (1994), S. 133-161 
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    ISSN: 1573-2932
    Keywords: biome ; climate ; crop yield ; global data bases ; land cover ; potential vegetation ; simulation models ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The terrestrial biosphere component of the Integrated Model to Assess the Greenhouse Effect (IMAGE 2.0) uses changes in land cover to compute dynamically the greenhouse gas fluxes between the terrestrial biosphere and the atmosphere. Potential land cover for both natural ecosystems and agrosystems, are determined with the Terrestrial Vegetation Model (TVM). TVM consists of separate submodels for the water-balance, global vegetation patterns, crop distribution and potential rain fed crop yield. All these submodels are based on local climatic, hydrological and soil characteristics and appropriate global data bases for those parameters are collected or compiled. The structure of all models, data bases and linkages between them and other modules of IMAGE 2.0 are described. Although computationally demanding, the models give an adequate description of the global vegetation and agricultural patterns. The only discrepancy occurs in regions where the vegetation and agricultural distribution depends on causes other than climatic, such as additional water storage and supply, anthropogenic influence and natural disturbance. Despite this discrepancy, we conclude that TVM simulates satisfactory global vegetation characteristics and that it can be adequately integrated with other models of IMAGE 2.0.
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    URL: http://dx.doi.org/10.1007/BF00478338
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    Groundwater acidification at Birkenes, southern Norway: Comparing trends of chemical composition of precipitation, throughfall, soilwater and groundwater (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 1861-1866 
    Details
    ISSN: 1573-2932
    Keywords: acidification ; buffering ; groundwater ; monitoring ; precipitation ; seasalt ; soil ; soilwater ; throughfall
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Chemical time trends for precipitation, throughfall, and soilwater (1986–1992), and groundwater (1980–1993) at Birkenes, southern Norway, are compared to gain insights into possible causes for the recent increase in groundwater acidification there. Precipitation and throughfall trends do not show evidence for an increase in anthropogenic acids (e.g. sulphate), but seasalt deposition (e.g. chloride) has been marginally greater in 1990–1992 than in most previous years on record. Soilwater composition partly indicates increasing acidification in recent years (pH, Al and ANC), but hardness and sulphate content are decreasing. Soilwater ANC became negative in 1989, revealing a lasting deficit in its potential to buffer acidity. Groundwater shows clear signs of intensifying acidification (pH, Al, ANC, hardness and sulphate), and this may result partly from climatic conditions (mild winters, ‘seasalt episodes’) and partly from the deterioration of an acid buffering system within the soil cover. Acidification via sulphate deposition certainly is not a direct cause. The declining hardness of soilwater suggests that the ion-exchange buffer in the soil may have ceased to function properly. The necessity for obtaining long-term time-series of water chemistry is underscored by this study.
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    URL: http://dx.doi.org/10.1007/BF00477251
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    Watershed base-cation cycle dynamics modeled over forest regrowth in a Central Appalachian ecosystem (1996)
    Springer
    Water, air & soil pollution 89 (1996), S. 1-22 
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    ISSN: 1573-2932
    Keywords: biogeochemistry ; watershed ; watershed analysis ; model ; budget ; input-output ; base cations ; dynamics ; weathering ; forest floor ; nutrient cycles ; soil ; acidification ; depletion ; ecosystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Watershed ecosystem analysis has been used to study aspects of nutrient cycles in many regions of the US. Here we quantify watershed input-output budgets and intrasystem cycling of the base cations Ca, K and Mg in a montane Virginia ecosystem. The intrasystem fluxes of uptake, return, canopy leaching and mineralization were simulated over the period of forest aggradation. A forest-dynamics model, based on previous models, was created to model biotically-driven fluxes at this site; biomass nutrient concentrations were parameterized with a field study. A two-year watershed mass-balance study was then conducted to estimate geologic fluxes for comparison with modeled biotic fluxes. Results show the major biotic fluxes to be much greater, highlighting the importance of considering biomass dynamics in ecosystem nutrient-cycling studies. Mineralization from forest-floor biomass compartments proved to be an increasingly important avenue for internal recycling during aggradation. Accumulation of base cations in biomass also corresponded to a production of H+ in soil at three times the H+ levels in atmospheric deposition at this location. Such high levels of base removal in soils could exceed weathering rates and may result in a depletion of bases from the soil exchange complex.
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    URL: http://dx.doi.org/10.1007/BF00300418
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    Chemical characteristics of leachate from pulp and paper mill residuals used to reclaim a sandy soil (1996)
    Springer
    Water, air & soil pollution 89 (1996), S. 167-187 
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    ISSN: 1573-2932
    Keywords: Pulp and paper mill sludge ; nitrogen ; DOC ; heavy metals ; water quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Primary sludge, secondary sludge, and wood ash from a pulp and paper mill were combined with sand to create a synthetic topsoil (C:N ratio of 18:1) to restore an abandoned gravel pit. Synthetic topsoil was applied to field microcosms at rates equivalent to 0, 2170, 4341, or 6511 kg N/ha; each was seeded with grass. Fifteen chemical constituents in leachate were measured during two field seasons. Cadmium, Ni and Zn were mobilized rapidly by soil disturbance. Chloride and SO4-S eluted rapidly from the sludge along with Na. Nitrate leached with Ca late in each field season when sludge N-mineralization and nitrification exceeded plant uptake and microbial immobilization. Ammonium elution was negligible. Dissolved organic carbon (DOC) was mobilized by decomposition of organic matter in the sludge, as were Mg and K. Copper eluted with DOC, probably as an organic ligand. Lead and ortho-P were below our detection limits. We concluded that a synthetic topsoil with a 30:1 C:N ratio applied at a rate of 2100-4300 kg N/ha should provide adequate plant nutrition while minimizing water quality hazards.
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    URL: http://dx.doi.org/10.1007/BF00300429
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    Feasibility of a counter-current extraction procedure for the removal of heavy metals from contaminated soils (1996)
    Springer
    Water, air & soil pollution 89 (1996), S. 317-335 
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    ISSN: 1573-2932
    Keywords: Soil remediation ; extraction ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Effective remediation and sanitation technologies for soils contaminated with heavy metals are limited. We investigated the feasibility of a counter-current metal extraction procedure for the removal of selected heavy metals (Cd, Cu, Ph, and Zn) from two contaminated soils. The process involved a decarbonation (removal of carbonates), acid solubilisation, washing, and liming step. Results from batch equilibration experiments simulating the counter-current process showed more than 85% of the Cd present to be removed. Removal efficiencies for Cu and Pb were limited to approximately 15%, this mainly due to resorption of these elements during the decarbonation step. As most Zn was found to be present in a more difficult acid-extractable solid phase, its extractability accounted for only 25%. While reaction (pH) conditions of both decarbonation and solubilisation determined removal efficiencies, washing the extracted soil with deionized water only slightly increased the amount of metals removed. Metal distribution among solid phases — exchangeable, carbonate, reducible, organically bound, and residual — was affected by the different treatments. The amount of metals contained in the exchangeable and residual fractions determined their extractability. Except for Cu, the reducible and organically bound fractions were less important. After solubilisation 13 to 70% of the metals were present in an exchangeable solid phase. This implicates that washing the solubilized soil with a salt may increase the extractability of metals, especially for Zn and Pb. Based on our results the process is critically evaluated and possibilities for optimization formulated.
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    URL: http://dx.doi.org/10.1007/BF00171639
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    Competitive adsorption phenomena adsorption phenomena of petrochemicals — benzene, toluene, and xylene in hexane in fixed-beds of sands (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 221-235 
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    ISSN: 1573-2932
    Keywords: petrochemicals ; adsorption ; soil ; multi-components ; fixed-column-reactor ; experiment ; breakthrough
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Present-day massive exploration, extraction, transport, and use of petrochemicals pose a real threat of continuous or occasional accidental contamination of precious groundwater. However, the knowledge of the pathways and mechanisms involved in the transport, retention, and degradation of such chemicals once they are within the soil matrix is very limited. One of the important means of petrochemical retention in the soil is through the process of chemical adsorption onto the soil. An investigation was conducted to observe the adsorption phenomena of several components of petrochemicals (benzene, toluene, and xylene) solved in hexane utilizing the columnar continuous plug-flow configuration of a fixed bed of sands. Three types of soils were investigated for the time variation of the adsorption of the organic chemicals. The results are the indicative values of the adsoption of the principal components of petrochemicals in paacked-soil-bed subjected to tortuous seepage flow conditions of the fluids. The adsorption results are presented in the form of breakthrough curves. The paper includes the analytical methodology of UV spectroscopy which was utilized to measure the concentrations of various chemical components of the petrochemical mixture.
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    URL: http://dx.doi.org/10.1007/BF02406167
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    Forms of Cu, Ni, and Zn in soils of sudbury, ontario and the metal concentrations in plants (1996)
    Springer
    Water, air & soil pollution 90 (1996), S. 531-542 
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    ISSN: 1573-2932
    Keywords: heavy metals ; smelting ; soil contamination ; plant contamination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Forms of Cu, Ni, and Zn in the contaminated soils of the Sudbury mining/smelting district were studied to assess metal mobility and plant availability. Soil, tufted grass (Deschampsia caespitosa (L.) Beauv.), tickle grass (Agrostis scabra Willd.), dwarf birch (Betula pumila L. var. glandulifera Regel) and white birch (Betula paprifera Marsh.) leaf and twig samples were taken from 20 locations around three Cu-Ni smelters. The sampling sites were collected to cover a wide range of soil pH and soil Cu and Ni concentrations. The water-soluble, exchangeable, sodium acetate-soluble, and total concentrations of the metals in the soils were analyzed. The soils were contaminated with Cu and Ni up to 2000 µg g−1. Zinc concentrations were also elevated in some samples above the normal soil level of 100 µg g−1. The mobility of Cu and Zn, expressed as the proportion of metals in Fl and F2 forms, increased with soil pH decrease. A strong positive correlation was found between the soil exchangeable (F2) Ni and the soil pH. Concentrations of Cu and Ni in birch twigs showed a good linear relationship with exchangeable forms of the metals in soils. A highly significant correlation was also found between total Ni in soils and the metal content of the twigs. No significant correlation was found between Zn concentrations in the soils and plants. Birch twigs are a good indicator (better than leaves) of Cu and Ni contamination of the Sudbury soils. The mobile forms of Cu and Ni and low pH seem to be the main factors that will control the success of revegetation. Strong variability of the soil metal mobility requires any reclamation effort be site-specific.
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    URL: http://dx.doi.org/10.1007/BF00282667
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    Solubility of heavy metals in a contaminated soil: Effects of redox potential and pH (1996)
    Springer
    Water, air & soil pollution 90 (1996), S. 543-556 
    Details
    ISSN: 1573-2932
    Keywords: heavy metals ; solubility ; redox potential ; pH ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract To assess the mobilities of Pb, Cd, and Zn from a contaminated soil, the effects of redox potential and pH value on metal solubilities were investigated. Both redox potential and pH were found to greatly affect heavy metal solubility in the soil. Results showed that the soil suspension under continuous oxygen aeration for 21 days resulted in increases of redox potential from 290 to 440 mV and pH value from 6.9 to 7.0, respectively. Soluble concentrations of Pb, Cd, and Zn varied with time, and were all lower than 1 mg kg−1. When the soil suspension was aerated with nitrogen, final redox potential was −140 mV and pH value of 7.1. The soluble metal concentrations were slightly higher than those aerated with oxygen. The equilibrium solubility experiments were conducted under three different pH values (3.3, 5.0, 8.0) and three redox potential (325, 0, −100 mV). Results showed that metals were sparingly soluble under alkaline conditions (pH = 8.0). Metal solubilities were higher when under slightly acidic conditions (pH = 5.0), and increased drastically when pH was kept at 3.3. When solubilities were compared under same pH values, it was observed that metal solubilities increased as redox potential decreased. Generally speaking, acidic and reducing conditions were most favorable for metal solubilization, and the effect of pH was more significant than that of redox potential. It was proposed that heavy metals were mostly adsorbed onto Fe-Mn oxyhydroxides. The pH-dependent metal adsorption reaction and the dissolution of Fe-Mn oxyhydroxides under reducing conditions was the mechanism controlling the release of heavy metals from soils.
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    URL: http://dx.doi.org/10.1007/BF00282668
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    Sulphur and heavy metal concentrations in Scots pine bark in northern Finland and the Kola peninsula (1997)
    Springer
    Water, air & soil pollution 93 (1997), S. 395-408 
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    ISSN: 1573-2932
    Keywords: air pollution ; pine bark ; sulphur ; pH ; conductivity ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Sulphur and heavy metal deposition in northern Finland (= in Lapland) and the Kola Peninsula were surveyed using Scots pine bark samples. Sulphur concentrations in bark close to the Kola smelters were on an average twice as high as on the Finnish side of the border. The Cu and Ni concentrations near the smelters were almost 100-fold the mean values in northern Finland. There was a marked decrease in the sulphur and heavy metal concentrations with increasing distance from the emission sources. The effects of emission from the Kola Peninsula were evident in Finland only close to the border, especially in the eastern parts of Inari (NE corner of Lapland) where the Cu and Ni concentrations were 2- to 6-fold those in western Lapland. The sulphur and heavy metal concentrations in most of northern Finland were low. However were the concentrations of Cr in bark in the SW corner of Lapland considerably high, due to the emissions from the Tornio refined steel plants.
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    The influence of heavy metals on carbon dioxide evolution from a typic xerochrept soil (1997)
    Springer
    Water, air & soil pollution 93 (1997), S. 409-417 
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    ISSN: 1573-2932
    Keywords: CO2 evolution ; heavy metals ; loading effect ; metal equivalent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In a laboratory study the effects on soil respiration of trace metals (Ni, Cd, Cu, Mn, Pb, Zn) added at loading rates ranging from 0 to 1000μg g−1 were determined. Differences in toxicity with respect to the type of metal salt added were also evaluated. The inhibitory effect on soil respiration differed considerably among the heavy metals and increased with the increasing loading rate. No linear relationships were found between the degree of inhibition and the levels of total and available metals. Toxicity evaluation at 20 and 50% inhibition of soil respiration showed Cu as the most toxic and Mn as the most tolerable metal. A ‘metal equivalent’ was calculated as the sum of the amounts of the available metals weighted to their relative toxicity with respect to the least toxic one: Mn equivalent=Mn+1.9Pb+2.1Ni+2.5Zn+6.7Cd+6.7Cu. The ionic potential of the heavy metals was found to be positively related to the percent inhibition of soil respiration. Chlorides and sulphates appeared to depress soil respiration more than nitrates, the latter counter-balancing the toxic effect of the heavy metals.
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    HEAVY METAL CONTAMINATED SOILS IN AN OLD INDUSTRIAL AREA OF WALES, GREAT BRITAIN: SOURCE IDENTIFICATION THROUGH STATISTICAL DATA INTERPRETATION (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 85-98 
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    ISSN: 1573-2932
    Keywords: soil ; pollution ; heavy metals ; smelters ; factoranalysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A combined statistical and computergraphic approach is proposed for apportionment and attribution of soil contaminants in complex areas. The field test site lies north of Swansea, south Wales and contains two major pollutant sources, an active nickel refiner and (4 km away) the site of major base metal smelting in the nineteenth century (the Lower Swansea Valley reclamation study area). Soil samples (70 samples, 0–15 cm) were collected on a regular grid of 1000 m interval. They were extracted using 0.05 M diammonium EDTA and the extracts analysed for Cd, Co, Cu, Fe, Mn, Ni, Pb and Zn. Soil pH and %organic content were also determined. Factor analysis yielded three groups which explained 73.8% of the data variance (1: Cd, Cu, %OM, Pb, Zn, Ni; 2: Cd, Zn, Mn, pH; 3: Cu, Mn, Co, Ni, Fe). Isoline plots were classifiable into the same three groups. It was concluded that factor 3 contained those elements associated with smelter emissions, factor 1 with contamination from the Lower Swansea Valley and in factor 2 pedogenetic processes control the occurrence of the elements.
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    URL: http://dx.doi.org/10.1023/A:1026478427782
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    WHOLE-CATCHMENT LIMING AT TJØNNSTROND, NORWAY: AN 11-YEAR RECORD (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 163-180 
    Details
    ISSN: 1573-2932
    Keywords: acid deposition ; liming ; catchment ; lake ; water chemistry ; fish ; soil ; model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In June 1983 a whole-catchment liming experiment was conducted at Tjønnstrond, southernmost Norway, to test the utility of terrestrial liming as a technique to restore fish populations in remote lakes with short water-retention times. Tjønnstrond consists of 2 small ponds of 3.0 and 1.5 ha in area which drain a 25-ha catchment. The area is located at about 650–700 meters above sea-level in sparse and unproductive forests of spruce, pine and birch with abundant peatlands. A dose of 3 ton/ha of powdered limestone were spread by helicopter to the terrestrial area. No limestone was added to the ponds themselves. The ponds were subsequently stocked with brown and brook trout. Liming caused large and immediate changes in surface water chemistry; pH increased from 4.5 to 7.0, Ca increased from 40 to 200 μeq/L, ANC increased from –30 to +70 μeq/L, and reactive-Al decreased from about 10 to 3 μmol/L. During the subsequent 11 years the chemical composition of runoff has decreased gradually back towards the acidic pre-treatment situation. The major trends in concentrations of runoff Ca, ANC, pH, Al and NO3 in runoff are all well simulated by the acidification model MAGIC. Neither the measured data nor the MAGIC simulations indicate significant changes in any other major ion as a result of liming. The soils at Tjønnstrond in 1992 contained significantly higher amounts of exchangeable Ca relative to those at the untreated reference catchment Storgama. In 1992 about 75% of the added Ca remains in the soil as exchangeable Ca, 15% has been lost in runoff, and 10% is unaccounted for. The whole-catchment liming experiment at Tjønnstrond clearly demonstrates that this liming technique produces a long-term stable and favourable water quality for fish. Brown trout in both ponds in 1994 have good condition factors, which indicate that the fish are not stressed by marginal water quality due to re-acidification. The water quality is still adequate after 11 years and 〉20 water renewals. Concentrations of H+ and inorganic Al have gradually increased and approach levels toxic to trout, but the toxicity of these are offset by the continued elevated Ca concentrations. Reduced sulphate deposition during the last 4 years (1990–94) has also helped to slow and even reverse the rate of reacidification. The experiment at Tjønnstrond demonstrates that for this type of upland, remote terrain typical of large areas of southern Norway, terrestrial liming offers a suitable mitigation technique for treating acidified surface waters with short retention times.
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    URL: http://dx.doi.org/10.1023/A:1026442821924
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    Pollutant exchange at the water/sediment interface in the venice canals (1997)
    Springer
    Water, air & soil pollution 99 (1997), S. 255-263 
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    ISSN: 1573-2932
    Keywords: heavy metals ; sediments ; pollution ; resuspension ; release processes ; bioavailability ; anthropogenic ; metal ; residual inetal ; geochemical phases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The space-time distribution of some pollutants (Cu, Ph, Zn, Cd, Fe, Mn, V, Ni, Cr) in the sludge of the canals of Venice was studied. The contamination levels were comparable to, or higher, than those measured in the most polluted sediments of the Lagoon of Venice Sediments were collected by two different sampling techniques I ) collection of sediment cores (upper 5 cm) by a syringe-type corer, 2) collection by traps, placed on the bottom of the canal Traps pennitted the sampling of sediments essentially resuspended by overlying water turbulence This sediment fraction is subjected to variations of its physicochemical parameters (principally change of redox conditions) and therefore to pollutant exchange at the water/sediment interface The metals principally exchanged during sediment resuspension were Cd, Pb, Zn and Cu These metals have principally an anthropogenic origin and are bound to the most labile geochemical phases of the sediment (such as sulphides), which can be oxidised during sediment resuspension, releasing metals into the water Fe, Cr and Ni were only partially exchanged, while Mn and V were generally not exchanged, a significant fraction of these metals is of natural origin and is bound to the most refractory phases of the sediment.
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    URL: http://dx.doi.org/10.1007/BF02406865
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    LONG-TERM TRANSFORMATIONS AND REDISTRIBUTION OF POTENTIALLY TOXIC HEAVY METALS IN ARID-ZONE SOILS INCUBATED: I. UNDER SATURATED CONDITIONS (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 399-423 
    Details
    ISSN: 1573-2932
    Keywords: fractionation ; redistribution ; saturation ; kinetics ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Solid-phase transformations of Cd, Cu, Cr, Ni and Zn, added as soluble salts at several levels to two arid-zone soils, were studied over a period of one year. The soils were maintained under a saturated-paste regime and sampled periodically. A selective sequential dissolution procedure was employed to determine the changes in metal distribution among six operationally defined solid-phase fractions. A function, Uts was introduced to measure the fractional attainment of equilibrium of the soils following a perturbation. The direction and rate of redistribution of the added metals in the soils were affected by the nature of the metal, the soil properties and the metal loading level. Cd added to the soils was transferred from the exchangeable (EXC) into the carbonate (CARB) fraction. When soluble Cu, Cr, Ni and Zn were added at low loading levels, metals were transferred from the reducible oxides(RO) bound and easily reducible oxides (ERO) bound fractions and the EXC fraction, into the CARB fraction. However, at the higher loading level, metals were transferred from the EXC and CARB fractions into the organic matter bound (OM), ERO and RO fractions. The Uts function approached lower values as incubation continued but remained removed from 1. The overall flux of metals among fractions was the combined result of the readjustment of the metals in the native soil to changing conditions due to saturation, and the transfer of added soluble metals to the less labile fractions.
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    URL: http://dx.doi.org/10.1023/A:1026450118082
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    Effect of copper smelting air pollution on the mites (ACARI) associated with young scots pine forests polluted by a copper smelting works at Głogów, Poland. II. Soil mites (1997)
    Springer
    Water, air & soil pollution 97 (1997), S. 287-302 
    Details
    ISSN: 1573-2932
    Keywords: Acari ; bioindicators ; Gamasida ; heavy metals ; Oribatida ; Scots pine forest
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The soil mites were investigated in the areas covered with dead needles in young Scots pine forests (plant associationLeucobryo-Pinetum), polluted by a copper smelting works at Głogów, and in a control plot. The concentration of heavy metals, mainly copper and lead, was the lowest in the control plot, and increased towards the pollution source. A high concentration of these metals reduced the density of mites and species number of Oribatida and Gamasida, while small concentrations were associated with the increasing abundance of mites and species number of Oribatida. Among mites, the following categories were distinguished: a) sensitive to heavy metals, b) sensitive to a high concentration, but tolerant of small concentrations, and c) tolerant of these metals. The changed vertical distribution of mites in the most polluted soil was also observed, due to accumulation of heavy metals in the Of/h horizon.
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    URL: http://dx.doi.org/10.1007/BF02407467
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    Accumulation of inorganic and organic pollutants by biofilms in the aquatic environment (1997)
    Springer
    Water, air & soil pollution 99 (1997), S. 651-659 
    Details
    ISSN: 1573-2932
    Keywords: River sediments ; biofilms ; organic micropollutants ; heavy metals ; temporal variations ; biosorption ; accumulation processes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In a partly urbanized catchment to the south of Trier, Germany, short term variations in river sediment compounds as well as the bioaccumulation of pollutants on surface associated microbial coatings (biofilms) were investigated weekly during a period of six months. Concentrations of selected heavy metals (Cu, Zn, Pb), polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB) and for microbial characterisation protein, carbohydrate and uronic acid were analyzed. Sorption processes on biofilms were determined by temporal variations in pollutants and microbial parameters and through the comparison of sorbed substances in biofilms and sediments. The results show, that sorption events on biofilms play an important and dynamic role in spring and summer for transport and accumulation of the investigated pollutants in the aquatic environment. The amount of pollutants sorbed on sediment particles is not only dependent on the particulate bound or solved pollutants in the river water, but is strongly controlled by the changing conditions of the biofilms.
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    URL: http://dx.doi.org/10.1007/BF02406904
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    The Influence of Age on Cadmium Concentrations in Seabirds (1998)
    Springer
    Environmental monitoring and assessment 50 (1998), S. 159-171 
    Details
    ISSN: 1573-2959
    Keywords: age ; biomonitoring ; heavy metals ; seabirds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effects of age on cadmium concentrations was investigated in Cory's shearwater, Calonectris diomedea, Lesser black-backed gull, Larus fuscus, and great skuas, Catharacta skua. There was no evidence for the continued accumulation of cadmium with increasing adult age. Adult shearwaters did have higher concentrations of cadmium compared to young fledglings, but there was no significant difference between cadmium concentrations in adult and sub-adult gulls. In addition, the sample of great skuas were of known age (3–22 yrs old) and showed no evidence of increasing cadmium concentrations with adult age in liver or kidney. However, it is possible that age accumulation of cadmium in great skuas was masked by individual dietary preferences overriding the effects of increasing age. It is often assumed that cadmium concentrations continue to accumulate with increasing adult age, but seabirds may have evolved some as yet unknown mechanism for excretion or more rapid turnover of cadmium than previously thought. The implications of this for the use of seabirds as biomonitors is discussed.
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    URL: http://dx.doi.org/10.1023/A:1005764008119
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    Studies on the Uptake of Heavy Metals by Various Plant Species on Chromite Minespoils in Sub-tropical Regions of India (1999)
    Springer
    Environmental monitoring and assessment 55 (1999), S. 389-399 
    Details
    ISSN: 1573-2959
    Keywords: accumulation ; heavy metals ; mine spoils ; vegetation ; soil-plant relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The presence of heavy metals (Cr, Ni and Fe) in soil and accumulated by herbs, shrubs and trees regenerated naturally on the minewaste-dumps of Sukinda chromite mines (TISCO sector) were investigated. There was significant correlationship between Cr and Fe in the soil where a tree species (Catunaregam spinosa) occurred. Guazuma ulmifolia and Diospyros montana also did show significant correlation between leaf, stem and soil for Cr, Ni and Fe. Among the shrubs (Calotropis gigantea, Chromolaena odorata, Phyllanthus reticulatus and Woodfordia fruticosa) significant and positive correlations were obtained for Cr and Ni in soil and iron and nickel in leaf and chromium and nickel in stem. Among the annual herbs, whole plant of tephrosia purpurea and Borrevia articularis showed significant and positive correlation with chromium and nickel with the maximum correlation coefficient value. It was concluded that the above information would be useful in revegetation programmes in subtropical regions having seasonal rainfall.
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    URL: http://dx.doi.org/10.1023/A:1005982915175
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    Comparison of Point Estimation Techniques in the Spatial Analysis of Radium-226, Radium-228 and Potassium-40 in Soil (1999)
    Springer
    Environmental monitoring and assessment 59 (1999), S. 191-209 
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    ISSN: 1573-2959
    Keywords: estimation ; geostatistics ; interpolation ; radionuclides ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Many environmental surveys require the implementation of estimation techniques to determine the spatial distribution of the variable being investigated. Traditional methods of interpolation and estimation, for example, inverse distance squared and triangulation often ignore features of the data set such as anisotropy which may have a significant impact on the quality of the estimates produced. Geostatistical techniques may offer an improved method of estimation by modelling the spatial continuity of the variable using semi-variogram analysis. The theoretical model fitted to the semi-variogram is then used in the assignation of weighting factors to the samples surrounding the location to be estimated. This paper outlines the results of a comparison between three common estimation methods, polygonal, triangulation and inverse distance squared and a geostatistical method, in the estimation of soil radionuclide activities. The geostatistical estimation method known as kriging performed best over a range of parameters used to test the performance of the methods. Kriging exhibited the best correlation between actual and estimated values, the narrowest error distribution and the lowest overall estimation error. Polygonal estimation was best at reproducing the data set distribution. Conditional bias was evident in all the methods, low values being over-estimated and high values being under-estimated.
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    URL: http://dx.doi.org/10.1023/A:1006141008027
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    Metals in Feathers of Bonin Petrel, Christmas Shearwater, Wedge-Tailed Shearwater, and Red-Tailed Tropicbird in the Hawaian Islands, Northern Pacific (1999)
    Springer
    Environmental monitoring and assessment 59 (1999), S. 343-358 
    Details
    ISSN: 1573-2959
    Keywords: birds ; environmental pollutants ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Levels of environmental pollutants are usually higher in mainland and coastal areas than in offshore or oceanic islands due to higher inputs from agricultural and industrial sources. Levels of heavy metals are usually higher in adult than in young birds, because they have had longer to accumulate metals in their tissues, and/or because they may eat larger, more contaminated, prey. We examined the levels of arsenic, cadmium, chromium, lead, manganese, mercury, and selenium in the adults and young of Bonin petrel (Pterodroma hypoleuca), Christmas shearwater (Puffinus nativitatis) and red-tailed tropicbird (Phaethon rubricauda) on Midway Atoll, and adult wedge-tailed shearwater (Puffinus pacificus) on Midway Atoll and on Manana Island (off Oahu) in the northern Pacific. All birds were analyzed individually except for Christmas Shearwater chicks where samples were pooled to obtain sufficient quantities for analysis. Significant (p〈0.05) age-related differences were found for mercury, selenium, manganese and chromium in Bonin petrels, for selenium and mercury in Christmas shearwaters, and for chromium and mercury in Red-tailed Tropicbirds. Lead approached significance for all three species. Adults had higher levels than young except for chromium and manganese in the petrels and arsenic in all three species. There were significant interspecific differences in concentrations of all metals except arsenic for the adults nesting on Midway. Christmas shearwaters had the highest levels of all metals except mercury and chromium. Bonin petrels, the smallest species examined, had mercury levels that were over three times higher than any of the adults of the other three species. For wedge-tailed shearwaters, levels of chromium and lead were significantly higher, and manganese and selenium were lower on Midway than Manana. Knowledge of the foraging ranges and habits of these far-ranging seabirds is inadequately known, but does not currently explain the observed differences among species. We could not find a consistent pattern of differences between the burrow nesting species (Bonin petrel, Wedge-tailed shearwater) and the surface nesting tropicbirds. There was no consistent pairwise correlation between any metals across all species.
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    URL: http://dx.doi.org/10.1023/A:1006134125236
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    Heavy Metal Tolerance in Chromogenic and Non-Chromogenic Marine Bacteria from Arabian Gulf (1999)
    Springer
    Environmental monitoring and assessment 59 (1999), S. 321-330 
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    ISSN: 1573-2959
    Keywords: agar diffusion assay ; Arabian Gulf ; chromogenic bacteria ; heavy metals ; toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A simple method – direct agar diffusion assay – was optimised for rapid assessment of heavy metal toxicity to marine chromogenic and non-chromogenic bacteria. The procedure involved spotting of a 10 microliter test solution on the seeded agar plate and incubation of the plates at 30°C to accelerate bacterial growth. Under optimum conditions, test results were obtainable within 12–18 hr instead of 96 hr incubation time generally required for a marine bacterial assay by conventional agar plate methods. A range of sixteen heavy metals, each at 5 different concentrations was tested. Toxicity was demonstrated by the formation of a clear zone of growth inhibition around the point of application. Toxicity of tested chemicals could be easily demonstrated at concentrations as low as 0.1 μg per spot on the agar plate. A dose dependent relation between metal concentration (μg/spot) and the diameter of the clear zone on agar plate was observed, suggesting potential of this method as an easy and economical tool in quantitative toxicology studies.
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    A Gradient Study of 34 Elements in the Vicinity of a Copper-Nickel Smelter in the Kola Peninsula (2000)
    Springer
    Environmental monitoring and assessment 60 (2000), S. 71-88 
    Details
    ISSN: 1573-2959
    Keywords: copper-nickel smelter ; ICP mass spectrometry ; Kola peninsula ; pollution ; soil ; trace elements ; vegetation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Concentrations of 34 elements determined by ICP mass spectrometry were studied in surface soil and vegetation along a north–south gradient through the ‘Pechenganickel’ smelter complex in Kola peninsula, northern Russia. Strong influence from the smelter was evident for Fe, Co, Ni, and Cu, mainly associated with dry deposition of large particles. Also for As, Se, Mo, Sb, Te, Bi, and Pb the smelter or associated sources appeared to be distinct contributors of contamination consisting presumably of smaller particles. Significant but less distinct effects leading to enhanced concentration levels were observed for P, S, V, Cr, Zn, and Tl. In the case of Mn, Rb, Sr, Cs, and Ba the concentrations in vegetation were generally lower near the source, which may be due to cation exchange with protons or heavy metal cations in the soil and subsequent leaching from the root zone. For Li, Be, B, Na, Mg, Al, Ca, Y, Cd, La, Th, and U no particular influence from the smelter complex was observed. Some characteristic differences observed in element concentrations in different plant species and between different years of Pinus sylvestris needles are discussed. The high concentrations observed for many trace elements in the humus horizon indicates that it acts as an active biogeochemical barrier against downward transport of these elements.
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    URL: http://dx.doi.org/10.1023/A:1006165031985
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    Estimation of the Soil Respiration Using the Constant Pressure Volumetric Respirometer and the Flow-Through Respirometer UNI-RES10 (2000)
    Springer
    Environmental monitoring and assessment 64 (2000), S. 583-590 
    Details
    ISSN: 1573-2959
    Keywords: biological activity of soil ; constantpressure volumetric respirometer ; flow-through respirometer ; respirometry methods ; soil ; soil respiration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Among commonly employed methods of fast estimation of the soil biological activity a method of the oxygen consumption determination is used. The main goal of this research was an estimation of a soil respiratory metabolism using the constant pressure volumetric respirometer and also using the flow-through respirometer UNI-RES10.Soil respiration measurements were done using both types of respirometers in temperatures 10, 15, 20, 25, 30 and 35 °C, keeping up the constant humidity. The investigated soil was a soil humus belonged to organic soils from the Dziekanów Leśny field. The soil respiration was also measured for 8 plant communities in Sudeten Mountains with various respiration intensity.After the experiments it was stated that both measuring instruments could be used for the soil metabolism evaluation. Readouts obtained from the UNI-RES10 respirometer are smaller then readouts when using the constant pressure volumetric respirometer. The flow-through respirometers have to be calibrated to obtain results comparable with these from volumetric ones. The volumetric and flow-through respirometry methods are useful for the comparative analysis of metabolism levels.
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    Assessing the risk of soil contamination in the Swiss Jura using indicator geostatistics (1997)
    Springer
    Environmental and ecological statistics 4 (1997), S. 49-64 
    Details
    ISSN: 1573-3009
    Keywords: soil ; pollution ; threshold ; geostatistics ; indicators ; kriging ; risk ; Swiss Jura
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The probability that the concentrations of toxic substances in soil or other medium exceed tolerablemaxima at any unsampled place can be estimated by indicator geostatistics. The method is developed and used to estimate and map the risk of contamination by cadmium, copper and lead in the topsoil of a 14.5 km 2 region in the Swiss Jura. It combines both direct measurements of metal concentrations and thecalibration of a geological map, and it shows that the risk of toxicity is least on Argovian rocks. Two approaches are proposed to divide a region into safe' and 'hazardous' zones on the basis of probability maps. The first declares as contaminated all places where the risk of contamination exceeds a given threshold. The second approach first evaluates the financial costs that might result from a wrongdeclaration, after which the site is allocated to a class so as to minimize that cost. The risk of exposure for humans and animals is generally greater for contaminated agricultural land than for forest soil, and so land use is taken into account in both procedures.
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    Toxicity of Nickel to the Earthworm and the Applicability of the Neutral Red Retention Assay (1998)
    Springer
    Ecotoxicology 7 (1998), S. 291-295 
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    ISSN: 1573-3017
    Keywords: earthworm ; nickel ; soil ; toxicology ; eisenia veneta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The toxic effects of nickel on survival, growth, and reproduction of Eisenia veneta were investigated following 4 weeks of exposure to a nickel-chloride spiked loamy sand soil. The ability of a simple earthworm biomarker, the lysosomal membrane stability of coelomocytes, to reflect nickel exposure was also studied. Nickel caused a significant toxic effect on E.veneta at soil concentrations above 85 mg Ni/kg. Reproduction (cocoon production) was the most sensitive parameter being reduced at soil concentrations above 85 mg Ni/kg (EC10 = 85 mg Ni/kg). Survival of adults was only reduced at concentrations above 245 mg Ni/kg, while adult and cocoon wet weight were not affected by soil nickel concentrations up to 700 mg Ni/kg. The lysosomal membrane stability, measured as neutral-red retention time, was reduced at soil nickel concentrations similar to those that reduced reproduction, and demonstrated a dose-response relationship. The neutral-red retention time showed large individual variation for the earthworms within each exposure concentration. It was concluded that the lysosomal membrane stability, measured as neutral red retention time, has a potential role in risk assessment, but care should be taken conducting this test.
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    Litter decomposition and nitrogen mineralization in oak stands along an urban-rural land use gradient (1997)
    Springer
    Urban ecosystems 1 (1997), S. 117-131 
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    ISSN: 1573-1642
    Keywords: decomposition ; heavy metals ; litterbags ; nitrification ; nitrogen mineralization ; urbanization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We investigated litter mass loss and soil nitrogen (N)-transformation rates in oak stands along a 130-km, urban-rural transect originating in New York City to examine the relationship between changes in these parameters and previously documented differences in soil temperature, heavy metal and total salt concentrations, and soil biota. Reference litter from a rural site was placed in litterbags, and rates of mass loss and changes in N concentration in litter residues were measured over a 6-month period. Net N-mineralization and nitrification rates were measured in A horizon soils using laboratory incubations under constant moisture and temperature. Both mass loss (76%) and N release (65%) from litterbags reached their maximum in urban stands, whereas net N-mineralization rates were 2.3-fold higher than in rural A horizon soils. Litter fragmentation by earthworms and higher soil temperatures are potential causes of the higher mass loss rates observed in urban stands. The higher releases of N measured in the urban litterbags could be a result of their faster mass loss rates, exogenous inputs of N from atmospheric deposition, a relatively low heterotrophic demand for N, or a combination of these factors. The results of this study suggest that in comparison with rural stands, urban forests are characterized by comparatively high rates of litter decomposition, and may also be characterized by comparatively high rates of N mineralization. Additional studies are needed to test whether these effects are common to urban environments in general.
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    Growth and survival of Pseudomonas cepacia DBO1(pRO101) in soil amended with 2,4-dichlorophenoxyacetic acid (1991)
    Springer
    Biodegradation 2 (1991), S. 245-252 
    Details
    ISSN: 1572-9729
    Keywords: 2,4-dichlorophenoxyacetic acid ; bacterial growth ; biodegradation ; Pseudomonas cepacia ; soil ; survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The 2,4-dichlorophenoxyacetic acid (2,4-D) degrading pseudomonad, Pseudomonas cepacia DBO1(pRO101), was inoculated at approximately 107 CFU/g into sterile and non-sterile soil amended with 0, 5 or 500 ppm 2,4-D and the survival of the strain was studied for a period of 44 days. In general, the strain survived best in sterile soil. When the sterile soil was amended with 2,4-D, the strain survived at a significantly higher level than in non-amended sterile soil. In non-sterile soil either non-amended or amended with 5 ppm 2,4-D the strain died out, whereas with 500 ppm 2,4-D the strain only declined one order of magnitude through the 44 days. The influence of 0,0.06, 12 and 600 ppm 2,4-D on short-term (48 h) survival of P. cepacia DBO1(pRO101) inoculated to a level of 6×104, 6×106 or 1×108 CFU/g soil was studied in non-sterile soil. Both inoculum level and 2,4-D concentration were found to have a positive influence on numbers of P. cepacia DBO1(pRO101). At 600 ppm 2,4-D growth was significant irrespective of the inoculation level, and at 12 ppm growth was stimulated at the two lowest inocula levels. P. cepacia DBO1(pRO101) was able to survive for 15 months in sterile buffers kept at room temperature. During this starvation, cells shrunk to about one third the volume of exponentially growing cells.
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    Identification of the key factors affecting composting of a weathered hydrocarbon-contaminated soil (1999)
    Springer
    Biodegradation 10 (1999), S. 105-112 
    Details
    ISSN: 1572-9729
    Keywords: bioremediation ; composting ; petroleum ; soil ; thermophilic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effects of the C/N ratio, CaCO3 and PO4 addition, and temperature profile on reactor-based composting of weathered hydrocarbon-contaminated soil were evaluated in a series of 30-day tests in temperature-controlled mini-composters. Soil containing 17,000 mg (kg dry soil)−1 mineral oil and grease (MOG) was composted with maple leaves and alfalfa. Although the leaves and alfalfa also contained MOG, degradation of contaminated soil derived MOG (total MOG degradation minus MOG degradation in a control with no soil) increased from 0 to 45% as the quantity of co-substrate increased from 0 to 63%. Simulation of biopile conditions (i.e., aeration and addition of mineral salts but no co-substrate) resulted in only 6% MOG degradation. Addition of CaCO3 before composting increased total MOG degradation from 23% to 43%. Total MOG degradation increased with decreasing C/N ratio. At a molar C/N ratio of 17, 43% of the total MOG was degraded in 30 days, while at a C/N ratio of 40 there was no total MOG degradation. When temperatures ranging from 23 to 60 °C were investigated, 50 °C maintained for 29 days resulted in the maximum degradation which was 68% of total initial MOG.
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    Microbial degradation of pentachlorophenol (1996)
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    Biodegradation 7 (1996), S. 1-40 
    Details
    ISSN: 1572-9729
    Keywords: bacteria ; degradation ; fungi ; pentachlorophenol ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Pentachlorophenol (PCP) was the most prevalent wood preservative for many years worldwide. Its widespread use had led to contamination of various environments. Traditional methods of PCP clean-up include storage in land-fill sites, incineration and abiotic degradation processes such as photodecomposition. Some aerobic and anaerobic microorganisms can degrade PCP under a variety of conditions. Axenic bacterial cultures, Flavobacterium sp., Rhodococcus sp., Arthrobacter sp., Pseudomonas sp., Sphingomonas sp., and Mycobacterium sp., and fungal cultures, Phanerochaete sp. and Trametes sp. exhibit varying rates and extent of PCP degradation. This paper provides some general information on properties of PCP and reviews the influence of nutrient amendment, temperature and pH on PCP degradation by various aerobic and anaerobic microorganisms. Where information is available, proposed degradation pathways, intermediates and enzymes are reviewed.
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    Degradation of olestra, a non caloric fat replacer, by microorganisms isolated from activated sludge and other environments (1996)
    Springer
    Biodegradation 7 (1996), S. 257-265 
    Details
    ISSN: 1572-9729
    Keywords: biodegradation ; sewage ; soil ; Pseudomonas aeruginosa ; fat replacement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Olestra is a non-caloric fat substitute consisting of fatty acids esterified to sucrose. Previous work has shown that olestra is not metabolized in the gut and is excreted unmodified in human feces. To better understand the fate of olestra in engineered and natural environments, aerobic bacteria and fungi that degrade olestra were enriched from sewage sludges, soils and municipal solid waste compost not previously exposed to olestra. Various mixed and pure cultures were obtained from these sources which were able to utilize olestra as a sole carbon and energy source. The fastest growing enrichment was obtained from activated sludge and later yielded an olestra-degrading pure culture of Pseudomonas aeruginosa. This mixed culture extensively degraded both 14C-fatty acid labeled olestra and 14C-sucrose labeled olestra during 8 days of incubation. Longer-term incubation with pure cultures of P. aeruginosa demonstrated that 〉98% of 14C-sucrose labeled olestra and 〉72% of 14C-fatty acid labeled olestra was mineralized to CO2 after 69 days. These results indicate that olestra degraders are present in environments not previously exposed to olestra and that olestra can serve as a sole carbon and energy source. Furthermore, a common bacterial species was isolated from activated sludge and shown to have the ability to degrade olestra.
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    Copper in Scots pine forests around a heavy-metal smelter in south-western Finland (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 1727-1732 
    Details
    ISSN: 1573-2932
    Keywords: copper ; element flux ; heavy metals ; Pinus ; soil pollution ; understorey vegetation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Distribution and fluxes of copper within Pinus sylvestris stands were studied during 1992–1994 along a heavy-metal pollution gradient in south-western Finland. The stands are situated at distances of 0.5, 4 and 8 km from a copper-nickel smelter that started operating in 1945 at Harjavalta. According to the results, copper concentrations in the soil, in the understorey vegetation and in the trees increased steeply towards the smelter. Almost 50 years' accumulation of heavy metals in the soil has caused direct toxic effects to soil microbes, thus decreasing decomposition and nutrient mineralisation. During the past few years, sulphur and heavy metal emissions from the copper and nickel smelter have been radically decreased. However, the heavy metals which have been accumulating in the soil for decades continue to affect the vegetation for a long time through soil processes. Consequently, long-term accumulation in the soil has to be taken into account when determining the critical loads of forest ecosystems for heavy metals.
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    URL: http://dx.doi.org/10.1007/BF00477229
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    Terrestrial ecosystem sensitivity to acidic deposition in developing countries (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2319-2324 
    Details
    ISSN: 1573-2932
    Keywords: sensitivity ; buffering ; acidification ; vegetation effects ; soil ; Al toxicity ; GIS ; mapping ; nutrient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Acidic deposition is considered a problem in Europe and North America but the potential for ecosystem damage from this pollution is also increasing rapidly in many developing countries. It is therefore important to assess current and future risks of ecosystem effects due to acidic deposition in these areas. It is possible to indicate risk areas by linking an assessment of sensitivity to net acidic input rates derived from deposition estimates for sulphur and nitrogen compounds and base cations. A method to assess and map a relative scale of terrestrial ecosystem sensitivity using international datasets is presented. The assessment relies on the determination of buffering mechanisms that prevent effects related to acidic deposition. Land-cover data, edaphic and climate datasets are combined using a GIS. Large areas are assessed as highly sensitive to acidic deposition in tropical regions of Asia, South and Central America and Africa, and also in the Boreal forests of northern Asia. Sensitive areas cover forest and non-forest ecosystems and some areas of agricultural production. Critical loads are not evaluated in this project but initial estimates will be applied to sensitivity classes at a further stage which will allow estimation of areas at risk by comparison with deposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186180
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    Predicting freshwater critical loads from national data on geology, soils and land use (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2443-2448 
    Details
    ISSN: 1573-2932
    Keywords: critical loads ; freshwaters ; geology ; soil ; land use ; sensitivity ; acidification ; catchments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Using information on geology, soils and land use, a map has been generated for Great Britain which indicates five classes of sensitivity of surface waters to acidification. This map has been used for designing sampling strategies for mapping critical loads of acidity for freshwaters. This paper evaluates the freshwater sensitivity map using a data set of water chemistry collected as part of the UK critical loads programme. Discriminant analysis was used to predict five critical load classes from information on geology and soil sensitivity for freshwater sites. This showed geology and soil information can correctly predict approximately 50% of all critical loads classes. In addition, 77% of sites fall within one critical loads class of that predicted. Predictions may be improved by including other variables eg altitude and geographical location. Differences between lake, stream and reservoir sites are also examined. Ranges of critical loads values were determined for each of the five classes of surface water sensitivity. While a trend in critical load values was evident between classes, there was significant overlap. A simplified sensitivity map with only three classes related more closely to critical loads values. The paper demonstrates the usefulness of the surface water sensitivity map for assessing acidification at a national scale, but highlights the difficulties of predicting critical loads for individual sensitive catchments using national data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186200
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    Sulphate sulphur concentration in vegetable crops, soil and ground water in the region affected by the sulphur dioxide emission from Płock oil refinery (central Poland) (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2539-2546 
    Details
    ISSN: 1573-2932
    Keywords: Sulphate sulphur ; abovenormal concentrations ; vegetable crops ; soil ; ground water ; allotment gardens ; household garden ; oil refinery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Research was carried out in 1984–1990 in the region affected by the sulphur dioxide emission from one of the greatest oil refineries in Europe (Płock, central Poland). The sulphate sulphur concentration in the vegetable crops (red beet, carrot, parsley, bean, cabbage and dill), the soil and in ground water was defined in selected allotment gardens of Płock city and in a household garden located in the rural area about 25 km from the town. The highest amount of sulphate sulphur was found in the vegetable crops cultivated in the garden situated in the closest vicinity of the refinery. Sulphate sulphur contents harmful for plants (above 0.50 per cent d.m.) were noted in cabbage and carrot leaves in almost all the gardens (except one). The soil in all examined gardens was characterised by high sulphate sulphur concentration, which considerably exceeds the maximum amount admissible for light soils in Poland, i.e. 0.004 per cent Am. The sulphate sulphur concentration in ground water in all the gardens exceeded the highest permissible content in drinking water in Poland (200 mg*dm−3 of sulphate or about 67 mg*dm−3 of sulphate sulphur). The sulphate sulphur content in the soil and ground water was not significantly dependent on the garden's distance from the refinery. Generally, the abovenormal sulphate sulphur concentrations occurred quite universally in the examined region and they concerned all the considered environmental components (vegetable crops, soil, ground water) and all the gardens.
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    URL: http://dx.doi.org/10.1007/BF01186216
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    Net change in organically bound halogens in relation to soil pH (1996)
    Springer
    Water, air & soil pollution 89 (1996), S. 351-361 
    Details
    ISSN: 1573-2932
    Keywords: organohalogen ; AOX ; organochlorine ; pH ; soil ; production ; mineralisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The total amount of organically bound halogens was determined in soil samples from the Palace Leas meadow hay plots, Northumberland, UK. These plots have been amended with different combinations of farmyard manure, potassium chloride, ammonium sulphate or nitrate since their establishment in 1897, resulting in, among other things, substantial pH differences between the plots. It was found that the amount of organically bound halogens increased significantly with decreasing pH. Net changes in amounts of organohalogens were also studied in soil obtained from a coniferous forest in southern Sweden. The collected soil was divided into four sets of samples, which were incubated in a climate chamber and subjected to different treatment regimes that influence soil pH. Significant changes in amounts of organically bound halogens were detected in three of the four sets of samples, resulting in significantly increasing amounts with decreasing pH. However, although the amount of organically bound halogens detected was related to soil pH in both the field and the experimental study, the net changes observed in the latter investigation were not directly related to soil pH. This shows that net changes in the amount of organically bound halogens in soil are caused by complex processes, and that further studies are needed to clarify the nature of the observed relation between soil pH and amounts of organically bound halogens.
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    URL: http://dx.doi.org/10.1007/BF00171641
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    Mercury speciation in contaminated soils by thermal release analysis (1996)
    Springer
    Water, air & soil pollution 89 (1996), S. 399-416 
    Details
    ISSN: 1573-2932
    Keywords: mercury speciation ; soil ; thermal release analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Thermal release analysis of mercury species in contaminated soils was performed by temperature controlled continuous heating of the samples in a furnace coupled to an Atomic Absorption Spectrophotometer (AAS). It was shown that this method allows the identification of different redox states of Hg-species through their characteristic releasing temperature ranges. The method was applied to Hg-contaminated samples from an inactive chlor-alkali production plant in former East Germany (GER), and from a gold mining area in Poconé, Mato Grosso, Brazil (BRA), as well as synthetic soil samples obtained by spiking pre-heated soil matrices (GER and BRA) with the following mercury species: Hg0, Hg2Cl2, HgCl2, HgO and HgS. The samples GER, in general, frequently showed the presence of Hg2+ probably bound to humic substances, in the case of samples with higher total carbon content. Only in highly contaminated samples (〉3000 ppm of mercury) was Hg0 the predominant species. The samples BRA more frequently showed the presence of mercury species in the lower oxidation states, i.e. Hg1+ in combination with Hg0. The method allows observing changes in Hg-speciation in the samples with time, mainly changes among the oxidation states Hg0, Hg1+ and Hg2+. The treated GER matrix showed a stronger tendency to oxidise Hf-species than the BRA treated matrix, in which only added Hg0 is partially oxidised to Hg2+ and Hg1+. In contrast, the BRA matrix showed a pronounced tendency to reduce spiked Hg2+ to Hg1+. This may be the reason for the presence of Hg1+ in the majority of original BRA samples. The method appears to be very useful to study speciation of mercury and its dynamics. It can be used as a tool for monitoring mercury oxidation states and/or reactions of mercury in soils.
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    URL: http://dx.doi.org/10.1007/BF00171644
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    HEAVY METALS IN ALLOTMENT GARDENS CLOSE TO AN OIL REFINERY IN PŁOCK (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 61-71 
    Details
    ISSN: 1573-2932
    Keywords: allotment gardens ; dustfall ; ground water ; heavy metals ; oil refinery ; soil ; vegetables
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the period 1984–1990 the following vegetables were grown: red beet, carrot and parsley in four allotment gardens of Płock city (Central Poland), situated near the refinery and petrochemical works. Cadmium, lead, copper, chromium, zinc and manganese concentrations were determined in the leaves and roots of vegetables. The heavy metal accumulation in the soil, dustfall (measure of air pollution), and ground water was determined. The quality of the vegetable yield, notably of the leaves, was low. This was mainly due to the excessive chromium and cadmium content in the leaves. Accumulation of heavy metals was relatively low in the soil, rather high in the ground water and variable in the dust.
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    URL: http://dx.doi.org/10.1023/A:1026402218990
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    ACCUMULATION OF CADMIUM AND ZINC FROM DIFFUSE IMMISSION ON ACID SANDY SOILS, AS A FUNCTION OF SOIL COMPOSITION (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 1-16 
    Details
    ISSN: 1573-2932
    Keywords: heavy metals ; pollution ; sandy soils ; zinc smelter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Sandy soils, in the border area of Belgium and the Netherlands (the Kempen region), are heavily contaminated by atmospheric deposition of cadmium and zinc from nearby smelters. Groundwater contamination by leaching from these low retention soils is subject of study. There are reports of high cadmium and zinc concentrations in groundwater in the area, but in most cases the direct sources are unknown. In an attempt to predict present or future risk of groundwater contamination by soil leaching, metal binding processes (retardation) were studied that are specific for these soil types under the existing acidifying conditions. From four fields nine contaminated profiles were sampled and analyzed for cadmium and zinc. Average concentrations of 131 μg g-1 zinc and 1.6 μg g-1 cadmium with maximum values of 2989 μg g-1 respectively 16.3 μg g-1 were found. In addition pH and contents of organic matter, aluminium, iron, and manganese were determined. The relative importance of these soil parameters for metal retardation is derived from the profiles. The data show that organic matter is the most important soil component for binding cadmium and zinc. Adsorption of cadmium and zinc on aluminium, iron and manganese (hydr) oxides appears to be of minor importance at low pH (〈5.5).
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    URL: http://dx.doi.org/10.1023/A:1019297625144
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    Accumulation of cadmium and zinc from diffuse immission on acid sandy soils, as a function of soil composition (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 1-16 
    Details
    ISSN: 1573-2932
    Keywords: heavy metals ; pollution ; sandy soils ; zinc smelter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Sandy soils, in the border area of Belgium and the Netherlands (the Kempen region), are heavily contaminated by atmospheric deposition of cadmium and zinc from nearby smelters. Groundwater contamination by leaching from these low retention soils is subject of study. There are reports of high cadmium and zinc concentrations in groundwater in the area, but in most cases the direct sources are unknown. In an attempt to predict present or future risk of groundwater contamination by soil leaching, metal binding processes (retardation) were studied that are specific for these soil types under the existing acidifying conditions. From four fields nine contaminated profiles were sampled and analyzed for cadmium and zinc. Average concentrations of 131μg g−1 zinc and 1.6μg g−1 cadmium with maximum values of 2989μg g−1 respectively 16.3μg g−1 were found. In addition pH and contents of organic matter, aluminium, iron, and manganese were determined. The relative importance of these soil parameters for metal retardation is derived from the profiles. The data show that organic matter is the most important soil component for binding cadmium and zinc. Adsorption of cadmium and zinc on aluminium, iron and manganese (hydr) oxides appears to be of minor importance at low pH (〈5.5).
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    URL: http://dx.doi.org/10.1007/BF02407193
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    Partitioning of heavy metals in podzol soils contaminated by mine drainage waters, Dalarna, Sweden (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 39-59 
    Details
    ISSN: 1573-2932
    Keywords: acid mine drainage ; heavy metals ; jarosite ; soils ; Sweden
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The discharge of acidic mine drainage waters onto a hillslope in Dalarna, central Sweden, has lead to the contamination of the podzol soils with Cu, Fe, Ni, Pb, Zn and sulfate. Samples from contaminated and reference soils have been collected for chemical and mineralogical analyses. Jarosite is identified by x-ray diffraction analysis as a precipitate in the upper horizons (A, E, B) of the contaminated soils, where the soil acidity (pHKCl∼2.6) promotes jarosite stability. The sequential chemical extraction of soil samples indicates that, in the reference A horizon, Cu, Pb, Ni and Zn are bound primarily to cation exchange sites and organic matter. In the A horizon of the contaminated soils closest to the rock dump, metal partitioning is dominated by the Fe oxide fractions, despite the high organic matter content; Pb is almost completely bound to crystalline Fe oxides, possibly adsorbed to Fe oxides or occuring in a jarosite solid solution. In the reference B and C horizons, Cu, Ni and Zn are primarily adsorbed/coprecipitated in the Fe oxide fractions, while Pb remains with a large fraction bound to organic matter. In the Fe-rich B horizon of the contaminated soils, the partitioning of the metals in cation exchange sites and to organic matter has greatly increased relative to the reference soils, resulting from the mobilization of organo-metal complexes down the profile.
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    URL: http://dx.doi.org/10.1007/BF02407195
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    Heavy metals in allotment gardens close to an oil refinery in Płock (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 61-71 
    Details
    ISSN: 1573-2932
    Keywords: allotment gardens ; dustfall ; ground water ; heavy metals ; oil refinery ; soil ; vegetables
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the period 1984–1990 the following vegetables were grown: red beet, carrot and parsley in four allotment gardens of Płock city (Central Poland), situated near the refinery and petrochemical works. Cadmium, lead, copper, chromium, zinc and manganese concentrations were determined in the leaves and roots of vegetables. The heavy metal accumulation in the soil, dustfall (measure of air pollution), and ground water was determined. The quality of the vegetable yield, notably of the leaves, was low. This was mainly due to the excessive chromium and cadmium content in the leaves. Accumulation of heavy metals was relatively low in the soil, rather high in the ground water and variable in the dust.
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    URL: http://dx.doi.org/10.1007/BF02407196
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    Spatial and Temporal Variability of Total Non-Residual Heavy Metals Content in Stream Sediments from the Suquia River System, Cordoba, Argentina (1997)
    Springer
    Water, air & soil pollution 93 (1997), S. 303-319 
    Details
    ISSN: 1573-2932
    Keywords: heavy metals ; TNR ; stream sediments ; Suquía River
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Suquía is a semiarid (rainfall, 700-900 mm y-1), medium-size (7700 km2) riversystem located in central Argentina. Its mountainous upper catchment includes pristine areas aswell as a variety of human settlements and a reservoir lake. A large city (Córdoba, ca. 1.3million inhabitants) and a terminal hypersaline lake are included in the middle and lower basin.Total non-residual (TNR) heavy metals (Pb, Cu, Ni, Zn, Mn, and Fe) have been determined inriver bed sediments in two seasons (spring and autumn), seeking to establish the factors whichcontrol the temporal and spatial variability. The major findings were: a) concentrations of TNRmetals were, in general, higher during springtime than during autumn, particularly downstreamfrom the city of Córdoba; b) organic matter played a significant role as a controlling factorwherever it defined reducing conditions, lowering the concentrations of Mn and Fe hydrousoxides; c) a higher organic load (e.g., downstream the city) and more pronounced reducingconditions could be the causes for the increased Fe concentration, probably precipitated assulfides; d) organic matter exhibited a closer correlation with some TNR metals in autumn,probably caused by a larger capacity for complexation in the biologically-processed organicdebris; and, e) the existence of pristine areas in the drainage basin allowed for the calculation ofenrichment factors (EF) which show the significance of several environmental impacts in theSuquía system.
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    URL: http://dx.doi.org/10.1023/A:1022113330970
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    Sulphur and Heavy Metal Concentrations in Scots Pine Bark in Northern Finland and the Kola Peninsula (1997)
    Springer
    Water, air & soil pollution 93 (1997), S. 395-408 
    Details
    ISSN: 1573-2932
    Keywords: air pollution ; pine bark ; sulphur ; pH ; conductivity ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Sulphur and heavy metal deposition in northern Finland (= in Lapland) and the Kola Peninsulawere surveyed using Scots pine bark samples. Sulphur concentrations in bark close to the Kolasmelters were on an average twice as high as on the Finnish side of the border. The Cu and Niconcentrations near the smelters were almost 100-fold the mean values in northern Finland. Therewas a marked decrease in the sulphur and heavy metal concentrations with increasing distancefrom the emission sources. The effects of emissions from the Kola Peninsula were evident inFinland only close to the border, especially in the eastern parts of Inari (NE corner of Lapland)where the Cu and Ni concentrations were 2- to 6-fold those in western Lapland. The sulphur andheavy metal concentrations in most of northern Finland were low. However were theconcentrations of Cr in bark in the SW corner of Lapland considerably high, due to the emissionsfrom the Tornio refined steel plants.
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    URL: http://dx.doi.org/10.1023/A:1022160930526
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    The Influence of Heavy Metals on Carbon Dioxide Evolution from a Typic Xerochrept Soil (1997)
    Springer
    Water, air & soil pollution 93 (1997), S. 409-417 
    Details
    ISSN: 1573-2932
    Keywords: CO2 evolution ; heavy metals ; loading effect ; metal equivalent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In a laboratory study the effects on soil respiration of trace metals (Ni, Cd, Cu, Mn, Pb, Zn)added at loading rates ranging from 0 to 1000 µg g-1 were determined. Differences intoxicity with respect to the type of metal salt added were also evaluated. The inhibitory effect onsoil respiration differed considerably among the heavy metals and increased with the increasingloading rate. No linear relationships were found between the degree of inhibition and the levels oftotal and available metals. Toxicity evaluation at 20 and 50% inhibition of soil respiration showedCu as the most toxic and Mn as the most tolerable metal. A ‘metal equivalent’ was calculated asthe sum of the amounts of the available metals weighted to their relative toxicity with respect tothe least toxic one: Mn equivalent = Mn + 1.9Pb + 2.1Ni + 2.5Zn + 6.7Cd + 6.7Cu. The ionicpotential of the heavy metals was found to be positively related to the percent inhibition of soilrespiration. Chlorides and sulphates appeared to depress soil respiration more than nitrates, thelatter counter-balancing the toxic effect of the heavy metals.
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    URL: http://dx.doi.org/10.1023/A:1022111323406
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    Ash from Cereal and Rape Straw Used for Heat Production: Liming Effect and Contents of Plant Nutrients and Heavy Metals (1997)
    Springer
    Water, air & soil pollution 93 (1997), S. 93-108 
    Details
    ISSN: 1573-2932
    Keywords: straw ash ; ashes ; bottom ash ; fly ash ; biofuel ; cereal straw ; rape straw ; straw combustion ; fertilizer ; plant nutrients ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The composition of 79 samples of straw ash from seven heating plants in Sweden wasanalysed with the aim of evaluating straw ash as a fertilizer and liming agent. The variation in ashcomposition was explained mainly by ash fraction (bottom ash vs. fly ash) and straw type (wheat,barley, rye, rape) but also by heating plant. Compared with concentrations of Zn, Pb and Cd inbottom ash, levels in fly ash were 10-90 times higher. Fly ash also contained more Cu and Kcompared with bottom ash. The Cd/P ratio was 0.03 in bottom ash and 0.6 g Cd/kg P in fly ash.Ash from rape straw had a higher Ca content and liming effect compared with ash from cerealstraw; e.g., the liming effect of rape ash was more than three times higher than that of wheat ash.The liming effect varied between 3.5 and 44% CaO and depended mainly on the Ca content. Theaverage P content was 1.7% (0.2-4.4%), with slightly higher concentration in rape ash than inwheat ash. The potential for using straw ash as a fertilizer and liming agent is discussed. Compared withcommercial fertilizers the use of bottom ash as a P fertilizer results in a lower addition of Cd.However, the total heavy metal content of straw ash poses a potential problem.
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    URL: http://dx.doi.org/10.1023/A:1022179708289
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    Spatial and temporal variability of total non-residual heavy metals content in stream sediments from the Suquia River system, Cordoba, Argentina (1997)
    Springer
    Water, air & soil pollution 93 (1997), S. 303-319 
    Details
    ISSN: 1573-2932
    Keywords: heavy metals ; TNR ; stream sediments ; Suquía River
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Suquía is a semiarid (rainfall, 700–900 mm y−1), medium-size (7700 km2) river system located in central Argentina. Its mountainous upper catchment includes pristine areas as well as a variety of human settlements and a reservoir lake. A large city (Córdoba, ca. 1.3 million inhabitants) and a terminal hypersaline lake are included in the middle and lower basin. Total non-residual (TNR) heavy metals (Pb, Cu, Ni, Zn, Mn, and Fe) have been determined in river bed sediments in two seasons (spring and autumn), seeking to establish the factors which control the temporal and spatial variability. The major findings were: a) concentrations of TNR metals were, in general, higher during springtime than during autumn, particularly downstream from the city of Córdoba; b) organic matter played a significant role as a controlling factor wherever it defined reducing conditions, lowering the concentrations of Mn and Fe hydrous oxides; c) a higher organic load (e.g., downstream the city) and more pronounced reducing conditions could be the causes for the increased Fe concentration, probably precipitated as sulfides; d) organic matter exhibited a closer correlation with some TNR metals in autumn, probably caused by a larger capacity for complexation in the biologically-processed organic debris; and, e) the existence of pristine areas in the drainage basin allowed for the calculation of enrichment factors (EF) which show the significance of several environmental impacts in the Suquía system.
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    URL: http://dx.doi.org/10.1007/BF02404763
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    Heavy metal contaminated soils in an old industrial area of Wales, Great Britain: Source identification through statistical data interpretation (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 85-98 
    Details
    ISSN: 1573-2932
    Keywords: soil ; pollution ; heavy metals ; smelters ; factor analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A combined statistical and computergraphic approach is proposed for apportionment and attribution of soil contaminants in complex areas. The field test site lies north of Swansea, south Wales and contains two major pollutant sources, an active nickel refiner and (4 km away) the site of major base metal smelting in the nineteenth century (the Lower Swansea Valley reclamation study area). Soil samples (70 samples, 0–15 cm) were collected on a regular grid of 1000 m interval. They were extracted using 0.05 M diammonium EDTA and the extracts analysed for Cd, Co, Cu, Fe, Mn, Ni, Pb and Zn. Soil pH and %organic content were also determined. Factor analysis yielded three groups which explained 73.8% of the data variance (1: Cd, Cu, %OM, Pb, Zn, Ni; 2: Cd, Zn, Mn, pH; 3: Cu, Mn, Co, Ni, Fe). Isoline plots were classifiable into the same three groups. It was concluded that factor 3 contained those elements associated with smelter emissions, factor 1 with contamination from the Lower Swansea Valley and in factor 2 pedogenetic processes control the occurrence of the elements.
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    URL: http://dx.doi.org/10.1007/BF02407095
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    INCREASED CADMIUM AVAILABILITY TO CROPS ON A SEWAGE-SLUDGE AMENDED SOIL (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 361-372 
    Details
    ISSN: 1573-2932
    Keywords: heavy metals ; contamination ; mobilization ; cadmium ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Analysis of spatial distribution of sewage-sludge born cadmium on the experimental plot revealed positive correlation of total cadmium and organic matter. Soil pH fluctuated randomly on the field. ‘Bioavailable’ concentrations, as determined by NH4-acetate extraction, were closely correlated to the total cadmium levels, and only negligible effects of pH and/or organic matter fluctuations were recorded. Desorption model using modified Freundlich isotherm was applied to predict risks of cadmium solubilization at different conditions. Simulations revealed that the organic matter content within the ranges found at the experimental field cannot support a proper immobilization of cadmium at pH-range observed at the field. The phenomenon was explained by ineffective care for the soil in the past.
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    URL: http://dx.doi.org/10.1023/A:1026407720823
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    soil lead levels in orchards and roadsides of mission peninsula, michigan (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 373-384 
    Details
    ISSN: 1573-2932
    Keywords: lead ; lead arsenate ; orchards ; soil ; Michigan ; automobile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Pb content in orchard soils at Mission Peninsula, Michigan was determined to assess the impact of historical lead arsenate applications. Soil samples at 72 sites located in five orchards were collected at depths of 2-, 20-, 50-, and 100 cm. Atomic absorption spectroscopy was used to quantify Pb levels (μg g-1). Mean surface Pb levels at individual orchards ranged from〈 1–136 μg g-1 and rapidly decreased with depth, to 〈1–5 μg g-1 at 100 cm. The impact of textural class and slope angle on Pb levels was also analyzed. Correlation coefficients linking Pb levels with textural class were weak, ranging from 0.21 to –0.07. Varying slope steepness and slope position within orchards failed to affect the spatial pattern of soil Pb. Soil Pb levels were also compared at 5 sites along local roads with varying levels of automobile traffic. Samples were collected 1 m from the roadside at the same depth intervals studied in orchards. Average daily traffic along the busiest roadsites ranged from 8200 to 16 000; these sites had Pb levels of 90–210 μg g-1. Such locales had Pb levels similar to the more intensively sprayed orchards.
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    URL: http://dx.doi.org/10.1023/A:1026459704894
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    Increased cadmium availability to crops on a sewage-sludge amended soil (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 361-372 
    Details
    ISSN: 1573-2932
    Keywords: heavy metals ; contamination ; mobilization ; cadmium ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Analysis of spatial distribution of sewage-sludge born cadmium on the experimental plot revealed positive correlation of total cadmium and organic matter. Soil pH fluctuated randomly on the field. ‘Bioavailable’ concentrations, as determined by NH4-acetate extraction, were closely correlated to the total cadmium levels, and only negligible effects of pH and/or organic matter fluctuations were recorded. Desorption model using modified Freundlich isotherm was applied to predict risks of cadmium solubilization at different conditions. Simulations revealed that the organic matter content within the ranges found at the experimental field cannot support a proper immobilization of cadmium at pH-range observed at the field. The phenomenon was explained by ineffective care for the soil in the past.
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    URL: http://dx.doi.org/10.1007/BF02406068
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    Soil lead levels in orchards and roadsides of mission Peninsula, Michigan (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 373-384 
    Details
    ISSN: 1573-2932
    Keywords: lead ; lead arsenate ; orchards ; soil ; Michigan ; automobile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Pb content in orchard soils at Mission Peninsula, Michigan was determined to assess the impact of historical lead arsenate applications. Soil samples at 72 sites located in five orchards were collected at depths of 2−, 20-, 50−, and 100 cm. Atomic absorption spectroscopy was used to quantify Pb levels (jig g−1). Mean surface Pb levels at individual orchards ranged from 〈1–136 pg g−1 and rapidly decreased with depth, to 〈 1-5 μg g−1 at 100 cm. The impact of textural class and slope angle on Pb levels was also analyzed. Correlation coefficients linking Pb levels with textural class were weak, ranging from 0.21 to −0.07. Varying slope steepness and slope position within orchards failed to affect the spatial pattern of soil Pb. Soil Pb levels were also compared at 5 sites along local roads with varying levels of automobile traffic. Samples were collected 1 m from the roadside at the same depth intervals studied in orchards. Average daily traffic along the busiest roadsites ranged from 8200 to 16 000; these sites had Pb levels of 90–210 μg g−1. Such locales had Pb levels similar to the more intensively sprayed orchards.
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    URL: http://dx.doi.org/10.1007/BF02406069
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    Bivalves and heavy metals in polluted sediments: A chemometric approach (1997)
    Springer
    Water, air & soil pollution 99 (1997), S. 615-622 
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    ISSN: 1573-2932
    Keywords: Near-shore sediments ; heavy metals ; bioindicators ; bivalves ; benthic populations ; multivariate analysis ; multiple regression analysis ; predictive models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Copper, lead, cadmium, zinc, chromium, manganese, iron and nickel were determined in near-shore sediments in the harbour of Trieste (Northern Adriatic), in an area highly exposed to urban and industrial wastes, where severe alteration of benthic population was observed. A typical bivalve of this area,Corbula gibba, was used as bioindicator of sea-bottom pollution. Multivariate statistical analysis of the chemical data interpret concentrations and distributions of heavy metals in these sediments, attesting anthropogenic source for Cu, Pb, Cd and Zn. Using labile fractions of heavy metals in sediments as ‘predictors’, and length or bionnass of the bivalve as dependent variables, we obtained, by a multiple regression procedure, a predictive model showing the influence of metals on this benthic organism of this polluted area.
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    URL: http://dx.doi.org/10.1007/BF02406900
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    Heavy Metal Content in Xylem Sap (Vitis Vinifera) from Mining and Smelting Areas (1998)
    Springer
    Environmental monitoring and assessment 50 (1998), S. 189-200 
    Details
    ISSN: 1573-2959
    Keywords: grapevines ; heavy metals ; mining ; smelting ; xylem sap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract No data are available on the content of heavy metals in the xylem sap of grapevines growing in contaminated areas. The aim of this work was to obtain data on the concentration of Pb, Zn, Cd and Cu in the xylem sap of grapevine (Vitis vinifera) cultivar Monica (ungrafted), growing near contaminated sites: a smelter, an abandoned and an active mine, and to investigate relationships between xylem sap mineral composition and the heavy metal content of the soil. The concentrations of Pb, Zn, Cd and Cu in the sap were enhanced compared to that of the soil, ranging from 4.3 to 611.4 µg Pb $$g_{d.wt.}^{ - 1} $$]〉$$ , 801 to 6176 µg Zn $$g_{d.wt.}^{ - 1} $$]〉$$ , 2.5 to 45 µg Cd $$g_{d.wt.}^{ - 1} $$]〉$$ and 19.8 to 161 µg Cu $$g_{d.wt.}^{ - 1} $$]〉$$ . Dry matter of xylem sap was significantly related to the heavy metals content in xylem saps, but no significant relationship between the metals in sap and total and DTPA/TEA extractable metal fraction in soil was found.
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    URL: http://dx.doi.org/10.1023/A:1005854213903
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    Contrasting effects of sewage sludge and commercial fertilizer on egg to adult development of two herbivorous insect species (1994)
    Springer
    Ecotoxicology 3 (1994), S. 94-109 
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    ISSN: 1573-3017
    Keywords: heavy metals ; old-fields ; municipal sludge ; blackfaced leafhopper ; Graminella nigrifrons ; Cicadellidae ; cabbage looper moth ; Noctuidae ; Trichoplusia ni
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Municipal sewage sludge containing heavy metals had a toxic effect on the development of the cabbage looper, Trichoplusia ni (Lepidoptera: Noctuidae), one of two herbivorous insects commonly found in an Ohio old-field which had been subjected to long-term sewage sludge application. Soils were removed in 1992 from an old-field following 11 years of heavy nutrient enrichment (1978 to 1988) with applications of either sewage sludge (Milorganite®) containing heavy metal contaminants or urea-phosphate fertilizer. Egg to adult development rate and survival of the blackfaced leafhopper, Graminella nigrifrons (Homoptera: Cicadellidae), and the cabbage looper was determined on maize (leafhopper) and broccoli (looper) seedlings grown in soils from sludge-treated, fertilizer-treated, or untreated control plots of the old-field. Fertilizer and sludgetreated soils had higher levels of N. P and organic matter, and a lower pH than the untreated control soils, while sludge-treated soils contained significantly higher concentrations of Cd, Cu, Pb, and Zn. Maize appeared to be unaffected by the three soil treatments, and survival and rate of egg to adult development of the leafhopper was not affected. Broccoli seedlings grown in both the high nutrient fertilizer and sludge soils were greener and larger than broccoli grown in control soils. However, the cabbage looper had significant larval and pupal mortality (25 to 40%) and prolonged egg to adult development on sludge-grown broccoli compared to control and fertilizer treatments. As assimilation into the food chain of heavy metals and other organic pollutants, such as PCBs, is in part a function of the interaction of soil chemistry and type of plant, the application of municipal sludges to old-fields needs to be carefully monitored, as contaminants may have significant developmental and behavioural effects on some secondary links in the old-field food chain.
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    URL: http://dx.doi.org/10.1007/BF00143408
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    Validity of lowcost laboratory geochemistry for environmental applications (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 119-131 
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    ISSN: 1573-2932
    Keywords: geochemical investigations ; geochemical validation ; heavy metals ; ICP-AES ; environmental monitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A little known alternative to highcost environmental analysis, especially in Europe, is the use of commercially available, lowcost exploration geochemical laboratory analysis. To test for suitable accuracy and precision, both indicated parameters were monitored during several sample runs for environmental examinations at a selected commercial geochemical laboratory using various digestive methods and ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry). By evaluating duplicate samples and repeated measurements of internal standards and comparing the results with precision needed for environmental investigations, exploration geochemical analysis is found to be more than adequate for most elements and digestive methods in environmental applications. Accuracy is highest for total digestion ICP-AES analysis, with expectedly greater error margins for aqua regia digestion. Lowcost exploration geochemical analysis is an inexpensive analytical tool for screening, detailed investigations and monitoring of contaminated sites.
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    URL: http://dx.doi.org/10.1007/BF02406160
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    Beryllium in environmental air, water and soil (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 133-146 
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    ISSN: 1573-2932
    Keywords: beryllium ; environment ; air ; water ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The study was specifically aimed to obtain concentration of beryllium in various environmental matrices such as air, water and soil in the vicinity of the Beryllium Metal Plant situated at Turbhe, New Bombay. Two analytical techniques - Morin fluorescence method and Atomic Absorption Spectrophotometry using graphite furnace were standardised for beryllium estimation. The beryllium concentration in the natural matrices studied - air, water and soil were in the range of 0.41–0.43 ng m−3, 0.01–0.02 ng mL−1 and 325–767 ng g−1 respectively.
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    URL: http://dx.doi.org/10.1007/BF02406161
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    Long-term transformations and redistribution of potentially toxic heavy metals in arid-zone soils incubated: I. Under saturated conditions (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 399-423 
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    ISSN: 1573-2932
    Keywords: fractionation ; redistribution ; saturation ; kinetics ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Solid-phase transformations of Cd, Cu, Cr, Ni and Zn, added as soluble salts at several levels to two arid-zone soils, were studied over a period of one year. The soils were maintained under a saturated-paste regime and sampled periodically. A selective sequential dissolution procedure was employed to determine the changes in metal distribution among six operationally defined solid-phase fractions. A function,U ts was introduced to measure the fractional attainment of equilibrium of the soils following a perturbation. The direction and rate of redistribution of the added metals in the soils were affected by the nature of the metal, the soil properties and the metal loading level. Cd added to the soils was transferred from the exchangeable (EXC) into the carbonate (GARB) fraction. When soluble Cu, Cr, Ni and Zn were added at low loading levels, metals were transferred from the reducible oxides(RO) bound and easily reducible oxides (ERO) bound fractions and the EXC fraction, into the CARB fraction. However, at the higher loading level, metals were transferred from the EXC and CARB fractions into the organic matter bound (OM), ERO and RO fractions. TheU ts function approached lower values as incubation continued but remained removed from 1. The overall flux of metals among fractions was the combined result of the readjustment of the metals in the native soil to changing conditions due to saturation, and the transfer of added soluble metals to the less labile fractions.
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    URL: http://dx.doi.org/10.1007/BF02406176
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    PARTITIONING OF HEAVY METALS IN PODZOL SOILS CONTAMINATED BY MINE DRAINAGE WATERS, DALARNA, SWEDEN (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 39-59 
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    ISSN: 1573-2932
    Keywords: acid mine drainage ; heavy metals ; jarosite ; soils ; Sweden
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The discharge of acidic mine drainage waters onto a hillslope in Dalarna, central Sweden, has lead to the contamination of the podzol soils with Cu, Fe, Ni, Pb, Zn and sulfate. Samples from contaminated and reference soils have been collected for chemical and mineralogical analyses. Jarosite is identified by x-ray diffraction analysis as a precipitate in the upper horizons (A, E, B) of the contaminated soils, where the soil acidity (pHKCl ∼ 2.6) promotes jarosite stability. The sequential chemical extraction of soil samples indicates that, in the reference A horizon, Cu, Pb, Ni and Zn are bound primarily to cation exchange sites and organic matter. In the A horizon of the contaminated soils closest to the rock dump, metal partitioning is dominated by the Fe oxide fractions, despite the high organic matter content; Pb is almost completely bound to crystalline Fe oxides, possibly adsorbed to Fe oxides or occuring in a jarosite solid solution. In the reference B and C horizons, Cu, Ni and Zn are primarily adsorbed/coprecipitated in the Fe oxide fractions, while Pb remains with a large fraction bound to organic matter. In the Fe-rich B horizon of the contaminated soils, the partitioning of the metals in cation exchange sites and to organic matter has greatly increased relative to the reference soils, resulting from the mobilization of organo-metal complexes down the profile.
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    URL: http://dx.doi.org/10.1023/A:1026461612610
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    Hydrochemistry of the aquifers in the Rio las Avenidas basin, Pachuca, Hidalgo, Mexico (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 185-201 
    Details
    ISSN: 1573-2932
    Keywords: Avenidas basin ; Pachuca mines ; hydrochemistry ; hydrochemical facies ; heavy metals ; groundwater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Groundwater in the Rio de las Avenidas sub-basin corresponds to the bicarbonate-sodium and bicarbonate-calcium hydrochemical facies, which result from the mineralization of water passing through alkaline rocks (andesites) which prevail in this basin. However, the presence of high concentrations of Na+ and K+ reveals the existence of an external inflow of these elements: the registered mean values are respectively 94.3 and 19.0 ppm, with the Tèllez and Tizayuca areas standing out with reported values of up to 142 ppm. As for the concentration of soluble water cations, we find in decreasing order: Na+, Ca2+, Mg2+, K+, along with the anions HCO3 −, Cl−, SO4 2−, CO3 −, which combine to form the NaHCO3, NaCl, Ca(HCO3)2, MgSO4 and KCl salts. The presence of biological contaminants, P and detergents in the groundwater indicates that it may have been contaminated by waste water. In addition to the contaminants mentioned above, large quantities of Pb, B, Zn, Fe, Mn, Cr, Co were detected and although Fe, Pb, Zn, B, and Mn are closely related to the local lithology, the high concentrations of these elements along with the occurrence of Co, Cr, Cd, and Ni confirm the gradual degradation of the aquifers in the sub-basin. The water temperature indicates the existence of low temperature thermal processes in the area.
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    URL: http://dx.doi.org/10.1007/BF02407204
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    HYDROCHEMISTRY OF THE AQUIFERS IN THE RIO LAS AVENIDAS BASIN, PACHUCA, HIDALGO, MEXICO (1997)
    Springer
    Water, air & soil pollution 96 (1997), S. 185-201 
    Details
    ISSN: 1573-2932
    Keywords: Avenidas basin ; Pachuca mines ; hydrochemistry ; hydrochemical facies ; heavy metals ; groundwater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Groundwater in the Rio de las Avenidas sub-basin corresponds to the bicarbonate-sodium and bicarbonate-calcium hydrochemical facies, which result from the mineralization of water passing through alkaline rocks (andesites) which prevail in this basin. However, the presence of high concentrations of Na+ and K+ reveals the existence of an external inflow of these elements: the registered mean values are respectively 94.3 and 19.0 ppm, with the Tèllez and Tizayuca areas standing out with reported values of up to 142 ppm. As for the concentration of soluble water cations, we find in decreasing order: Na+, Ca2+, Mg2+, K+,along with the anions HCO3 -, Cl-, SO4 2-, CO3 -, which combine to form the NaHCO3, NaCl, Ca(HCO3 2, MgSO4 and KCl salts. The presence of biological contaminants, P and detergents in the groundwater indicates that it may have been contaminated by waste water. In addition to the contaminants mentioned above, large quantities of Pb, B, Zn, Fe, Mn, Cr, Co were detected and although Fe, Pb, Zn, B,and Mn are closely related to the local lithology, the high concentrations of these elements along with the occurrence of Co, Cr, Cd, and Ni confirm the gradual degradation of the aquifers in the sub-basin. The water temperature indicates the existence of low temperature thermal processes in the area.
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    URL: http://dx.doi.org/10.1023/A:1026452116613
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    Computing atmospheric transport and deposition of heavy metals over Europe: Country budgets for 1985 (1996)
    Springer
    Water, air & soil pollution 92 (1996), S. 343-374 
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    ISSN: 1573-2932
    Keywords: long-range transport ; atmospheric deposition ; heavy metals ; country budgets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Heavy Metal Eulerian Transport (HMET) model has been used to calculate the exchange of As, Cd, Pb and Zn between European countries in 1985. The model was run separately for each emitter country and the computed deposition field was used to calculate the contribution of the emitter to each receptor country. The results of these computations are presented in the form of a country budget matrix for each metal. Accuracy of such computations is dependant on the size and linearity of the numerical method applied to the transport equation. Exchange of heavy metals due to atmospheric transport over Europe is significant. Approximately 30% to 90% of the heavy metals emitted from each country is deposited in other countries. The remaining mass is deposited in European seas, Atlantic Ocean and transported outside the model domain. The largest part of the emission from each country is deposited in the same country. The next largest fraction is transported to the nearest neighbors. The results indicate also a significant long range ransport of heavy metals to the Soviet Union. This is partly justified by the size and location of this receptor country, as well as, the prevailing meteorological conditions in Europe. However, this large transport to USSR is slightly overestimated due to some artificial properties of the numerical method applied to basic model equations. In addition to the country budget, export versus import and emission versus deposition of metals were analyzed for each country. The largest positive difference between export and import was found for Poland, German Federal Republic and Yugoslavia (As, Cd and Zn), and United Kingdom, Italy and Belgium (Pb). The Soviet Union and Czechoslovakia are the countries where import of all metals is significantly larger than export. When emission versus deposition of heavy metals is analyzed, the Soviet Union has much higher emissions than deposition of all metals compared to other European countries.
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    URL: http://dx.doi.org/10.1007/BF00283567
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    Nutrient distribution in a Norway spruce stand after long-term application of ammonium nitrate and superphosphate (1996)
    Springer
    Water, air & soil pollution 92 (1996), S. 451-467 
    Details
    ISSN: 1573-2932
    Keywords: Biomass ; calcium ; fertilization ; loss ; magnesium ; nitrogen ; nutrient ; potassium ; recovery ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The distribution of nutrients between soil layers and above-ground tree components was examined in a Norway spruce stand that had received ammonium nitrate (annually) and superphosphate (about every third year) for 22 years. Four treatments were included in the study; control (n = 4), N1P1, N2P2 and N3P2 (n = 2), which had received a total of 0, 730, 1700 and 2550 kg nitrogen (N) ha-1, 0, 130, 300 and 300 kg phosphorus (P) ha-1 and 0, 340, 784 and 784 kg calcium (Ca) ha-1, respectively. Compared with the control, stem-wood growth had been three times higher in N1P1 and three and a half times higher in N2P2 and N3P2. Amounts of N, P, Ca, potassium (K) and magnesium (Mg) in the above-ground tree biomass increased (p〈0.05) with the fertilizer dose, whereas manganese (Mn) did not. The recovery of fertilizer N and Ca in soil and above-ground tree biomass was negatively related to the fertilizer dose, although there had been a buildup of the N and Ca pools in the mor layer. This strongly indicates that at least the higher doses of N addition caused substantial nitrate leaching. Soil pools of K, Mg and Mn decreased as the fertilizer dose increased. However, the system total amounts (above-ground tree biomass plus soil) of K and Mg did not differ between treatments suggesting that no extra losses of these ions induced by nitrate leaching have occurred. Thus, in an aggrading forest ecosystem, N additions are likely to be followed by increased uptake of K, Mg and Ca. This may to some extent prevent extra leaching of these ions, which otherwise would be expected when there is an increase in nitrate leaching.
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    Heavy Metals and Chlorinated Hydrocarbon Concentrations in the Red Fox in Relation to Some Biological Paramaters (1999)
    Springer
    Environmental monitoring and assessment 54 (1999), S. 87-100 
    Details
    ISSN: 1573-2959
    Keywords: heavy metals ; organochlorines ; red fox
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Heavy metals and organochlorine contamination were analyzed in tissues of red foxes (Vulpes vulpes) from the Province of Siena (central Italy). Mercury (Hg), cadmium (Cd) and lead (Pb) concentrations were assessed in liver tissues and the data were analyzed for differences in relation to sex and age. Overall Hg, Cd and Pb mean values were 0.16, 0.62 and 0.64 μg g_1 d.w., respectively. HCB, DDT and PCB concentrations were assayed in fatty tissues and muscle. The highest levels of those pollutants were found in muscle (0.47, 1.16 and 20.2 μg g_1 lipid basis of HCB, DDTs and PCBs respectively), rather than in fat (0.23, 0.49 and 7.2 μg g_1 l.b. of HCB, DDTs and PCBs respectively). Pollutant accumulation was analyzed in relation to sex, age and sexual maturity of females.
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    URL: http://dx.doi.org/10.1023/A:1005974014029
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    Differentiation of Clams from Fishing Areas as an Approximation to Coastal Quality Assessment (1999)
    Springer
    Environmental monitoring and assessment 54 (1999), S. 229-237 
    Details
    ISSN: 1573-2959
    Keywords: coastal index ; discriminant analysis ; fishing areas ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The quality assessment of fishing areas on the basis of the levels of heavy metals in clams ( Chamelea gallina) was attempted by using discriminant analysis. Five metals, Hg, Pb, Cd, Cu and Zn, were analyzed in the soft edible parts of clams from three fishing areas. The descriptive methods applied to data obtained do not show enough differences between sampling stations for management purposes. Only discriminant analysis is successful in the differentiation between all fishing areas. Through the first discriminant function, the group centroids are proposed as index of different source of clams. These values standardized are proposed as coastal quality index.
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    URL: http://dx.doi.org/10.1023/A:1005960212211
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    Levels of Heavy Metals in Karelian Wildlife, 1989–91 (1999)
    Springer
    Environmental monitoring and assessment 56 (1999), S. 177-193 
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    ISSN: 1573-2959
    Keywords: accumulation ; bioindicators ; concentrations ; heavy metals ; Karelia ; wildlife
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The levels of mercury, cadmium, lead, copper, nickel, zinc and iron were determined in samples of liver, kidney, skeletal muscle, heart, lungs and hair of moose (N = 67), reindeer (N = 45), brown bear (N = 18), wild boar (N = 10) and squirrel (N = 18) shot in Karelia from 1989 to 1991 during regular hunting. The highest heavy-metal concentrations were found in livers, kidney, lungs and hair samples. The samples of muscle contained lowest levels of these elements. The tissues of moose, reindeer and brown bear were contaminated with heavy metals to a greatest extent. Lowest levels of toxicants were recorded in wild boar. Results indicate a widespread presence of heavy metal in the environment and in wildlife, which may be linked to acid precipitation. There was no evidence of these elements accumulated to toxic levels, but Karelian public have been informed that the eating of moose liver and kidney would probably result in their exceeding WHO standard weekly intake limit for cadmium.
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    URL: http://dx.doi.org/10.1023/A:1005988511058
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    Soil Contribution to the Elemental Composition of Epiphytic Lichens (Tuscany, Central Italy) (1999)
    Springer
    Environmental monitoring and assessment 58 (1999), S. 121-131 
    Details
    ISSN: 1573-2959
    Keywords: bioaccumulation ; Italy ; lichens ; soil ; trace elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Total concentrations of Al, Ba, Cd, Co, Cr, Cu, Fe, Mn, Mo, Pb, Sr, Ti, V and Zn in the epiphytic lichen Parmelia sulcata and superficial soils from 60 remote sampling sites in Tuscany (central Italy) were determined to evaluate the contribution of soil to the elemental composition of the lichen. The results showed that in the Mediterranean environment, the trace element content of unwashed lichen samples is greatly affected by soil contamination. However, despite the strong correlations between the concentrations of lithogene elements such as Al, Fe and Ti in P. sulcata, lichen levels of these elements were not at all linearly correlated with their concentrations in the soil, suggesting that dust contamination is highly variable and probably dependent on local site characteristics. All methods evaluated to minimize soil contamination indicated Cu, Pb and Zn as elements of atmospheric origin. However, while levels of Pb were similar to those reported for background areas, moderate pollution by Cu and Zn, probably from fertilizers used in agriculture, was revealed. For elements such as Cd and Mo, identified as atmophile, some uncertainty exists due to the fact that they are essential for lichen metabolism and accumulate intracellularly in lichens; they may therefore occur in soluble form in the lichen thallus.
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    URL: http://dx.doi.org/10.1023/A:1006047431210
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  • 89
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    Assessment of the Heavy Metal Pollution Effects on the Soil Respiration in the Baix Llobregat (Catalonia, NE Spain) (2000)
    Springer
    Environmental monitoring and assessment 61 (2000), S. 301-313 
    Details
    ISSN: 1573-2959
    Keywords: biological activity ofsoil ; constant-pressure volumetric respirometer ; heavy metals ; respirometry methods ; soil ; soil degradation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A main goal of investigations is to determine could a soilrespiration be an indicator of the soil pollution. In this case a measured levelof the soil oxygen consumption depends of its pollution. It alsomeans that the pollution reduces biological processes in edaphon.Investigated soil samples were taken from polluted andnon-polluted places in the Baix Llobregat near Barcelona (Catalonia, NE Spain). Soil samples were taken from the top ofsoil (0–5 cm) without a litter. Soil analysis were done, determining percentage shares of coarsefragments, coarse sand, fine sand, coarse silt, fine silt, clay,CaCO3, organic matter as well as water pH and conductivityCE (1:5 [mS cm-1]). Also were determined (in mg kg-1)quantities of heavy metals, as Fe, Al, Mn, Zn, Cr, Ni, V, Cu, Cd, Pb.The soil respiration was investigated in temperatures15 and 30 °C and with controlled humidity.The respiration in 30 °C is number of times greater thenin 15 °C both for polluted and non-polluted soils.Particularly high coefficients of correlation between the soilrespiration and soil pollution in polluted soils were obtainedfor Pb: r = 0.75 in 15 °C and r = 0.98 in30 °C; for Ba: 0.90 and 0.57; for V: 0.99 and 0.81. In non-polluted soils highest correlation coefficients are for Pb: r = 0.70 in 15 °C; Fe: 0.60 and 0.72; Al: 0.68 and0.64; Mn: 0.51 and 0.66; Ba: 0.63 and 0.61; Cr: 0.94 and0.70; Ni: 0.64 and 0.65; Cu: 0.69 and 0.48; as well as V: 0.62in 15 °C; and Cd: 0.69 in 15 °C.This way the soil respiration could be a good indicator of the soil pollution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006105329210
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  • 90
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    Lead in Soil and Sediment in Iqaluit, Nunavut, Canada, and Links with Human Health (2000)
    Springer
    Environmental monitoring and assessment 63 (2000), S. 329-339 
    Details
    ISSN: 1573-2959
    Keywords: bioavailable ; lead ; sediment ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This study determined the spatial distribution of soiland of sediment-associated lead in Iqaluit, Nunavut.Samples were collected from the following areas:outside the built-up area of the town to reflectbackground concentrations; known or potential pointsources of lead, such as the Upper Base, the SylviaGrinnell Dump and the Metal Dump (North 40); andresidential and commercial areas of Iqaluit and Apex,a satellite community. In the laboratory, the 〈63 μm sample fraction was analyzed for total lead andbioavailable lead, estimated by non-residual acidextractable lead content. The research findings revealthat elevated levels of bioavailable lead are presentin the study area. Total lead concentrations generallydo not exceed environmental guidelines. However, leadconcentrations in the Sylvia Grinnell Dump, and Apexand Iqaluit grid areas exceed health-based guidelines.The research concludes that there is not a serioushealth hazard posed by lead levels in the soil andsediment in the study area. However, severalenvironmental (elevated lead levels, bioavailableforms of lead and bare soil surfaces) and behaviouralfactors (vigorous and unsupervised play outside) maycreate a risk of lead exposure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006253529308
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  • 91
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    The role of biomarkers in environmental assessment (4). Terrestrial plants (1994)
    Springer
    Ecotoxicology 3 (1994), S. 180-192 
    Details
    ISSN: 1573-3017
    Keywords: adaptation ; damage ; drought ; fluorinated compounds ; heavy metals ; phytochelatins ; proline ; putrescine ; seleno amino acids ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The potential of metabolites, enzymatic processes and changes in plant performance as biomarkers in environmental assessment is reviewed. Biomarkers may be used as an early warning system of specific or general stress at each biological level, from molecules to ecosystems. The sensitivity of a species and, thus, the efficiency of a biomarker will depend on the degree of already present adaptation to environmental stress and on the homogeneity of the investigated population. Biomarkers for specific environmental stresses are scarce; better known are biomarkers for environmental stress complexes such as heavy metals, physiological drought and extreme temperature or biomarkers as a reaction on a full scale of environmental stresses. It is argued that a battery of biomarkers is necessary to evaluate chemical hazards to species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00117083
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  • 92
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    Effects of Copper on Macrobenthic Assemblages in Soft Sediments: A Laboratory Experimental Study (1998)
    Springer
    Ecotoxicology 7 (1998), S. 161-173 
    Details
    ISSN: 1573-3017
    Keywords: copper ; heavy metals ; laboratory experiment ; soft sediment ; macrofauna ; assemblages
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Assemblages of marine benthic invertebrates have been shown to differ in areas with or without contamination by heavy metals. In this study, soft sediment assemblages were exposed to sediments and water treated with copper (in the form of Cu EDTA) in a laboratory experiment to test the hypothesis that copper could create differences in infaunal assemblages. The patterns of survival of all taxa were monitored and compared to the controls. Copper was found to reduce the abundance of most taxa, but the size of the response varied between taxa. Crustaceans were particularly sensitive to both the laboratory conditions and copper and were the most severely affected. Polychaetes were more resilient, surviving well in the controls and being reduced in abundance in polluted treatments, but with some families persisting in even the severely polluted treatment until the end of the experiment. Bivalves and gastropods were also reduced in number in the polluted treatments and unaffected in the controls. Oligochaetes and nemerteans did not respond in any particular pattern to any treatment or control. The results are discussed in relation to extrapolating results from ecotoxicological studies to predictions of ecosystem response to heavy metal pollution and pollution in general. It is concluded that laboratory ecotoxicological studies provide excellent evidence for potential effects. If used in collaboration with surveys and manipulative experiments in the field they can demonstrate causal links between pollutants and environmental impacts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1014356327595
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  • 93
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    Estimating the Effect on Soil Organisms of Exceeding No-Observed Effect Concentrations (NOECs) of Persistent Toxicants (1999)
    Springer
    Ecotoxicology 8 (1999), S. 9-21 
    Details
    ISSN: 1573-3017
    Keywords: NOEC ; competition ; biodiversity ; nematodes ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In estimating the effects of toxic substances on ecosystems we generally lack information on the sensitivity (expressed as a no-observed effect concentration, NOEC) of individual species in the field, and have to rely on information from laboratory test species, expressed as a frequency distribution of NOECs. In this case we can express toxic stress as the fraction of organisms that is exposed above its NOEC: the potentially affected fraction (PAF). This paper describes a model of the soil food web and the effect of toxic stress by persistent pollutants. The model predicts that in the absence of competition, individual species disappear from the foodweb at toxic concentrations 3–5 times their NOEC. With competition present, species affected by toxic stress are replaced by less sensitive ones. This has a twofold effect: species disappear from the foodweb at a lower concentration because loss of competitiveness occurs well before absolute extinction, but the replacement of disappearing species implies that the effect on total biomass and diversity becomes only noticeable at a PAF level near 100%. Model predictions are in good agreement with observations on nematode communities in experimental fields contaminated with copper and zinc. The model serves to illustrate why overall measures of ecosystem functioning (total biomass, production, diversity) are affected by toxic stress only at high levels of pollution, which is particularly true for systems with a high diversity. This apparent robustness masks a considerable genetic ‘erosion’, i.e. the disappearance of sensitive species or genotypes. The PAF is a good indicator of the latter effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008845226732
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  • 94
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    Studies of Soils, Soil Water and Stream Water at a Small Catchment near Guiyang, China (1998)
    Springer
    Water, air & soil pollution 101 (1998), S. 137-162 
    Details
    ISSN: 1573-2932
    Keywords: acidification ; acid rain ; catchment ; China ; geochemistry ; soil ; soil water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Acid deposition is considered to be a major environmental problem in China, but information about effects on soils and waters is scarce. To contribute to increased knowledge about the problem a small catchment (about 7 ha) in the outskirts of Guiyang, the provincial capital of Guizhou in south-western China, was instrumented for collection of precipitation, throughfall, soil water and stream water. In addition soil samples have been collected and analyzed for key properties. Median pH in the precipitation is 4.40 (quartiles: 4.19 and 4.77) and the median sulfate concentration 228 µeq/L (quartiles: 147 and 334 µeq/L). The dry deposition of both SO2 and alkaline dust is considerable. The sum of wet deposition of sulfate and dry deposition of SO2 has been estimated to about 8.5 gSm-2yr-1. The total S-deposition may be somewhat higher due to dry deposition of sulfate and occult deposition. In soil water, SO4 2- is the major anion, generally ranging from 300 to 2500 µeq/L in the different plots. Calcium is an important cation, but there is also a considerable contribution of aluminum from the soil. In some of the plots the concentrations of inorganic monomeric aluminum (Ali) are typically between 200 and 400 µm. Potential harmful levels of aluminum and/or high Ali/(Ca2+ + Mg2+) molar ratios occur in the catchment, but damages to vegetation have not yet been reported. In most cases exchangeable aluminum accounts for between 75 and 95% of the total effective cation exchange capacity (CECE) in the mineral soils. The aluminum chemistry cannot easily be explained by conventional models as the Gaines-Thomas ion-exchange equation or equilibrium with an Al(OH)3 mineral phase. The stream water is generally less acidic and has considerably lower concentrations of aluminum than the soil water, even though quite acid events have been observed (pH 〈 4.4). The median pH values are 4.9 and 5.0 in the two first order streams and 6.3 in the dam at the lower boarder of the catchment.
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    URL: http://dx.doi.org/10.1023/A:1004985209931
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  • 95
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    Temporal Changes in Cadmium, Thallium, and Vanadium Mobility in Soil and Phytoavailability under Field Conditions (1998)
    Springer
    Water, air & soil pollution 101 (1998), S. 399-410 
    Details
    ISSN: 1573-2932
    Keywords: bioavailability ; bush bean ; cadmium ; contamination ; heavy metal ; industrial waste ; mobility ; Phaseolus vulgaris ; sandy soil ; Savannah River Site ; soil ; thallium ; vanadium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A field study was conducted over a 30 mo period to examine movement of Cd, Tl, and V through the profile of a Coastal Plain soil (Typic Kandiudult) and the availability of these trace metals to bush bean (Phaseolus vulgaris L.) plants. The metals were applied to field plots as dissolved salts and mixed into the surface 7.5 cm. The greatest concentration of all three metals was observed in the surface soils, with a steep decrease occurring down to the 7.5 to 15 cm depth. Thallium was the most mobile of the three metals; approximately 15% of the applied Tl and 〈3% of the applied Cd and V moved below the surface 7.5-cm region during the 30-mo experiment. Extractable concentrations of all three metals in the surface soils decreased significantly (P ≤0.05) during the initial 18 mo after treatment. No further decrease occurred between 18 and 30 mo. The presence of Al- and Fe-oxides and small amounts of clay minerals and organic matter in this highly-weathered, low cation-exchange soil were likely responsible for the retention of the trace metals. Bioavailability, as measured by concentrations and total amounts of metals in root and aboveground tissues of plants, did not change significantly between 18 and 30 mo. These data suggest that bioavailability of Cd, Tl, and V decreased over time as a result of transformation of these elements into unavailable forms and not to leaching. These changes in bioavailability occurred soon after application, becoming negligible after 18 mo.
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    URL: http://dx.doi.org/10.1023/A:1004906313547
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  • 96
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    Heavy Metal Fractionation and Extractability in Dredged Sediment Derived Surface Soils (1998)
    Springer
    Water, air & soil pollution 102 (1998), S. 313-328 
    Details
    ISSN: 1573-2932
    Keywords: dredged sediment derived surface soils ; heavy metals ; sedimentdisposal site ; sequential extraction DTPA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The objective of this study was to characterise pollution with heavy metals in surface soils sampled at various dredged sediment disposal sites in the Flemish region (Belgium). The sites selected varied in the period since sediment disposal ceased and in current vegetation and land use. Total metal contents (Cd, Co, Cu, Fe, Mn, Ni, Pb, and Zn) in the surface soils varied widely. For some disposal sites Cd and Zn concentrations greatly exceeded reference values for clean soil. The distribution of the metals as determined by sequential extraction differed between elements, but was simular for all the soils. This suggested that metals in these sediment derived surface soils were accumulated and transformed in a similar way. Residual fractions were low compared to total contents (2 – 4% for Cd, 25% – 35% for Co, 7 – 18% for Mn, 4 – 22% for Zn, 12 – 41% for Ni, 11 – 42% for Pb, 20 – 45% for Cu, 〈 10% for Zn). High metal concentrations in the acid-extractable and reducible fractions may indicate pollution from anthropogenic sources. DTPA-extractable metals, which may be considered indicative of plant-available contents, were relatively high compared to the total contents. The relative extractability, expressed as the ratio of DTPA-extractable to total contents, decreased in the order Cd (38%) 〉 Cu (28%) = Zn (26%) 〉 Pb (13%) 〉 Ni (10%) 〉 Co (3%). Most of the sites studied would be of concern if they were used for agricultural activities. No trends in metal availability in the period following disposal were apparent from the data.
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    URL: http://dx.doi.org/10.1023/A:1004916632457
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  • 97
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    Removal of Heavy Metals from Calcareous Contaminated Soils by EDTA Leaching (1999)
    Springer
    Water, air & soil pollution 109 (1999), S. 1-15 
    Details
    ISSN: 1573-2932
    Keywords: EDTA ; heavy metals ; leaching ; lead ; soil remediation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The performance of EDTA for the treatment of calcareous soils contaminated with heavy metals from mining and smelting activities was evaluated in this study. Soil samples containing variable levels of contamination, from 500 to 35 000 mg kg-1 Pb and 700 to 20 000 mg kg-1 Zn, were subjected to EDTA treatment and the extraction of heavy metals was found to vary, ranging between 50 and 98% for Pb and 50 to 100% for Zn. Total residual concentrations were above the limits set by regulatory authorities; leachable metals, however, were efficiently removed and treated soils were all acceptable in terms of toxicity. The effect of EDTA concentration and pulp density was studied on a soil sample containing 12 000 mg kg-1 Pb and 10 000 mg kg-1 Zn. Heavy metals removal was improved at low pulp densities and when EDTA concentration was increased from 0.025 to 0.25 M. The tetrasodium salt Na4-EDTA was found to be less effective for metals removal compared to the disodium salt Na2-EDTA, though applied at higher concentrations. This experimental work has also demonstrated the great importance of soil matrix for the overall evaluation of the EDTA leaching as a cost effective remedial option. The simultaneous dissolution of calcite was found to consume approximately 90% of the available EDTA. It was thus concluded that for the treatment of calcareous soils the design criteria and cost estimations should be based on the calcite content of the soil.
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    URL: http://dx.doi.org/10.1023/A:1005089515217
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  • 98
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    The Impact of Atmospheric Deposition of Non-Acidifying Substances on the Quality of European Forest Soils and the North Sea (1999)
    Springer
    Water, air & soil pollution 109 (1999), S. 357-396 
    Details
    ISSN: 1573-2932
    Keywords: critical load ; deposition ; heavy metals ; persistent organic pollutants ; soil quality ; water quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the pilot study ESQUAD the impact of atmospheric deposition of three heavy metals (cadmium, copper and lead) and two persistent organic pollutants (benzo(a)-pyrene and lindane) on the quality of European soils and seawater has been calculated. Calculations have been made of atmospheric transport and deposition using a detailed emissions database for Europe. This enabled deposition maps to be produced to a resolution of approximately 50 km. The distribution of pollutant concentrations in forest soils was calculated for each grid cell using a database of soil property parameters in Europe. For the North Sea, a model was used to map long-term concentrations in water and sediment, which are due to atmospheric deposition and other, non-atmospheric sources. The model calculations allowed detailed comparisons of deposition fluxes and concentrations of the substances studied with critical loads and environmental quality threshold values, including critical loads. Although significant uncertainties were identified, the study gives insight in how threshold exceedance rates in Europe relate to pollutant type, threshold type, environmental compartment and chemophysical phase (adsorbed, dissolved). For all pollutants and for all compartments exceedances were calculated for at least some of the quality thresholds that were chosen.
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    URL: http://dx.doi.org/10.1023/A:1005083425852
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  • 99
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    Chemical Composition of Urban Wet Deposition in Amman, Jordan (1999)
    Springer
    Water, air & soil pollution 112 (1999), S. 55-65 
    Details
    ISSN: 1573-2932
    Keywords: anions ; cations ; chemical composition ; heavy metals ; rain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Precipitation events were collected during the period from October 1996 to April 1997 from two sites in the city of Amman, Jordan. The samples were analyzed for major cations (Na+, K+, Ca2+, Mg2+ and NH4+), major anions (F-, Cl-, NO3- and SO42-), in addition to heavy metals (Cu2+, Cd2+, Zn2+, and Pb2+). High levels of Ca2+ and SO42- were observed. The results were comparable with some regional values and they indicate that about 58% of Na+ and Cl- are of marine origin, while Ca2+, K+ and a large fraction of SO42- are of soil dust origin. Heavy metals were detectable in most of the samples, zinc showed the highest concentrations. Significant correlation was obtained between zinc and lead, which may indicate automobile emission source.
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    URL: http://dx.doi.org/10.1023/A:1005086616451
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  • 100
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    Environmental Impacts in the Jianghan Plain: Evidence from Lake Sediments (1999)
    Springer
    Water, air & soil pollution 112 (1999), S. 21-40 
    Details
    ISSN: 1573-2932
    Keywords: China ; eutrophication ; heavy metals ; palaeolimnology ; spheroidal carbonaceous particles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract There is growing concern about the environmental impact of rapid economic growth in China. The problem is compounded by the scarcity of baseline data on the state of China's natural environment. As a step towards solving this problem, palaeolimnological methods have been applied to seven lakes in the Jianghan Plain, China, to evaluate recent changes in human impact. Lake sediment cores show enhanced concentrations of fossil fuel derived spheroidal carbonaceous particles (SCP) and Pb at all sites across the Jianghan Plain. The distribution of these industrial contaminants shows the overwhelming influence of the industrial cities. Wuhan dominates the fossil fuel derived pollution, while the copper smelter at Daye dominates the heavy metal pollution. Analysis of sediment diatom assemblages indicates mean total phosphorus concentrations of greater than 40 μg L-1 P in the lakes of the more intensely agricultural western part of the Jianghan Plain. The sediment concentration profiles for biogenic elements at these sites indicates a post-1960 eutrophication. Evidence for eutrophication in the eastern lakes is much weaker, though some evidence is present at all sites. The tracers of industrial pollution (Pb and SCP) correlate with Mn in the many of the lake sediments. This is compatible with both soil acidification, and soil gleyification due to intensified rice production.
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    URL: http://dx.doi.org/10.1023/A:1005040713678
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