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  • heavy metals  (56)
  • Springer  (56)
  • American Chemical Society (ACS)
  • 1995-1999  (56)
  • 1945-1949
  • 1997  (56)
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Keywords
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  • 1995-1999  (56)
  • 1945-1949
Year
  • 1
    Electronic Resource
    Electronic Resource
    Metal accumulation strategies in saprophagous and phytophagous soil invertebrates: a quantitative comparison (1997)
    Springer
    BioMetals 10 (1997), S. 45-53 
    Details
    ISSN: 1572-8773
    Keywords: heavy metals ; millipedes ; slugs ; springtails ; woodlice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract To quantitatively reveal accumulation patterns of environmentally relevant heavy metals in selected saprophagous or phytophagous soil invertebrates, adults of the species Porcellio scaber (Isopoda), Tetrodontophora bielanensis (Collembola), Julus scandinavius (Diplopoda), and Deroceras reticulatum (Gastropoda) were exposed to lead-, cadmium-, or zinc-contaminated food and soil for three weeks. The heavy metal concentrations in the food, the substrate, and the bodies of the invertebrates were measured by atomic absorption spectrophotometry (AAS). The investigated species were found to differ in their metal accumulation strategies, which is interpreted as a consequence of different detoxification mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018366703974
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical effects of heavy metals on the hydration of calcium sulphoaluminate 4CaO·3Al2O3·SO3 (1997)
    Springer
    Journal of thermal analysis and calorimetry 50 (1997), S. 393-400 
    Details
    ISSN: 1572-8943
    Keywords: calcium sulphoaluminate ; ettringite ; hazardous wastes ; heavy metals ; solidification/stabilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The system 4CaO·3Al2O3·SO3-CaSO4·2H2O-Ca(OH)2 was hydrated in the presence of ten dopants, specifically soluble salts of heavy metals. When added in 10% amount, the effect of each salt is strongly evident at shorter curing times, the hydration kinetics being more favoured in the order Pb(NO3)2〈K2CrO4〈 Cd(NO3)2〈 Zn(NO3)2t~Mn(NO3)3=K2MoO4〈Ni(NO3)2〈Cu(NO3)2〈Cr(NO3)3〈Fe(NO3)3. At longer curing times the differences among the systems decrease significantly. The 28-day compressive strength is almost the same for all the systems except those containing Pb(NO3)2, K2MoO4 and K2CrO4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01980499
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  • 3
    Electronic Resource
    Electronic Resource
    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 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02404769
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  • 4
    Electronic Resource
    Electronic Resource
    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 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02404770
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  • 5
    Electronic Resource
    Electronic Resource
    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 ; 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026478427782
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  • 6
    Electronic Resource
    Electronic Resource
    Pollutant exchange at the water/sediment interface in the venice canals (1997)
    Springer
    Water, air & soil pollution 99 (1997), S. 255-263 
    Details
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02406865
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  • 7
    Electronic Resource
    Electronic Resource
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026450118082
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  • 8
    Electronic Resource
    Electronic Resource
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407467
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  • 9
    Electronic Resource
    Electronic Resource
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02406904
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of methylmercury and inorganic mercury on periphytic diatom communities in freshwater indoor microcosms (1997)
    Springer
    Journal of applied phycology 9 (1997), S. 215-227 
    Details
    ISSN: 1573-5176
    Keywords: Freshwater ecotoxicology ; periphyton ; diatoms ; indoormicrocosm ; heavy metals ; methylmercury ; inorganic mercury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of inorganic mercury (HgII) and methylmercury (MeHg) on the colonization of artificial substrates by periphytic diatoms were studied using indoor freshwater microcosms. These consisted of a mixed biotope– water column + natural sediment – with rooted macrophyte cuttings (Elodea densa) and benthic bivalve molluscs (Corbicula fluminea).The periphyton was collected on glass slides in the water column after 34and 71 days. The two Hg sources were introduced either by daily additions to the water column, or once at the beginning into the sediment, using two nominal concentrations: water column, 0.5 μgL-1 and 2 μg L-1 for both compounds: sediment, 0.5 mg kg-1 (fw) and 2 mgkg-1 (fw) for MeHg and 1 mg kg-1 (fw) and 10 mgkg-1 (fw) for HgII. Several complementary criteria were used to analyse the structural and functional perturbations induced: cell density, species richness, diatom size, relative abundance. Exposure to MeHg added to the water column resulted in reduced cell density and changes in species composition with enhancement of e.g. Fallacia pygmaea or Nitzschia palea; inorganic Hg had less effect on the population structure. After contamination via the sediment, the effects of the two compounds were less pronounced than for the water source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007960506716
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