ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (19)
  • lead
  • sediment
  • 2000-2004  (19)
  • Energy, Environment Protection, Nuclear Power Engineering  (17)
  • Medicine  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Relation of Waterfowl Poisoning to Sediment Lead Concentrations in the Coeur d'Alene River Basin (2000)
    Springer
    Ecotoxicology 9 (2000), S. 207-218 
    Details
    ISSN: 1573-3017
    Keywords: lead ; waterfawl ; sediment ; toxicity ; mining ; risk assessment ; swans ; ALAD ; protoporphyrin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract For many years, waterfowl have been poisoned by lead after ingesting contaminated sediment in the Coeur d'Alene River Basin, in Idaho. Results of studies on waterfowl experimentally fed this sediment were combined with results from field studies conducted in the Basin to relate sediment lead concentration to injury to waterfowl. The first step in the model estimated exposure as the relation of sediment lead concentration to blood lead concentration in mute swans (Cygnus olor), ingesting 22% sediment in a rice diet. That rate corresponded to the 90th percentile of sediment ingestion estimated from analyses of feces of tundra swans (Olor columbianus) in the Basin. Then, with additional laboratory studies on Canada geese (Branta canadensis) and mallards (Anas platyrhynchos) fed the sediment, we developed the general relation of blood lead to injury in waterfowl. Injury was quantified by blood lead concentrations, ALAD (δ-aminolevulinic acid dehydratase) activity, protoporphyrin concentrations, hemoglobin concentrations, hepatic lead concentrations, and the prevalence of renal nuclear inclusion bodies. Putting the exposure and injury relations together provided a powerful tool for assessing hazards to wildlife in the Basin. The no effect concentration of sediment lead was estimated as 24 mg/kg and the lowest effect level as 530 mg/kg. By combining our exposure equation with data on blood lead concentrations measured in moribund tundra swans in the Basin, we estimated that some mortality would occur at a sediment lead concentration as low as 1800 mg/kg.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008998821913
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    An Overview of Contaminant-Related Issues Identified by Monitoring in San Francisco Bay (2000)
    Springer
    Environmental monitoring and assessment 64 (2000), S. 409-419 
    Details
    ISSN: 1573-2959
    Keywords: monitoring ; assessment ; water ; sediment ; bioaccumulation ; toxicity ; pesticides ; mercury ; PCB
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The San Francisco Estuary Regional Monitoring Program for Trace Substances (RMP) began in 1993 and is sponsored by 74 local, state, and federal agencies and companies through their discharge or Bay use permits. The RMP monitors water, sediment, toxicity, and bivalve bioaccumulation at 25 sites in the Bay that are considered to represent "background" conditions. Several major environmental issues have been identified by the RMP. Polychlorinated biphenyls and mercury were often above water quality guidelines, and often occurred in fish tissues above U.S. Environmental Protection Agency (U.S. EPA) screening values. Concentrations do not appear to be decreasing, suggesting continuing inputs. Episodes of aquatic toxicity often occurred following runoff events that transport contaminants into the Bay from urbanized and agricultural portions of the watershed. Sediment toxicity occurred throughout the Bay, and has been correlated with concentrations of specific contaminants (chlordanes, polynuclear aromatic hydrocarbons) at some locations; mixtures of contaminants were probably also important. Since the RMP does not monitor all ecosystem components, assessments of the overall condition of the Bay cannot be made. However, in terms of contamination, the RMP samples suggest that the South Bay, and North Bay sites are moderately contaminated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006459605924
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Lead Levels in the Airborne Dust Particulates of an Urban City of Central India (2000)
    Springer
    Environmental monitoring and assessment 62 (2000), S. 305-316 
    Details
    ISSN: 1573-2959
    Keywords: airborne dust particulates ; distribution pattern ; fall-out analysis ; flux ; lead
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The dust fall-out rate, distribution pattern andconcentration of lead in the particulate fall-outmatters in urban Raipur city covering an area of 160 km2 during one hydrological year i.e. November1996–June 1997, has been described. The entire cityhas been divided into 6 zones comprising ofindustrial, commercial, residential and heavy trafficareas. A monthly collection and analysis of dustfall-out rate between 3.0(±0.1) and91.3(±1.2) metric tonnes km-2 month-1 wereobserved at all 6 sampling sites. The total annualflux of lead in the fall-out of the city at differentzones is in the range 0.0065–0.4304 kg km-2yr-1. The results show that dust fall-out and thelead levels both are at higher magnitudes in winterand autumn. These large levels of air pollutants havealso been correlated with some meteorological parameters like relative humidity and temperature, and strong positive correlations have been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006241126582
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    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
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Tracking the metal distribution in the tropical Valencia lake catchment: Soil, rivers and lake (2000)
    Springer
    Environmental geochemistry and health 22 (2000), S. 131-153 
    Details
    ISSN: 1573-2983
    Keywords: heavy metals ; pollution ; sediment ; trace metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Medicine
    Notes: Abstract In tropical areas, the relations between soil, rivers, and lakes are poorly understood as regard to the physicochemical transformation that occurs when solid materials are transferred among them. In order to ascertain the natural dynamics of Na, K, Mg, Ca, Al, Fe, Mn, Pb, Zn, Cu, Ni, Cr, and Co, as well as the perturbations by human activity, soils and sediments from a tropical catchment were studied. To accomplish the above mentioned objective, the Valencia Lake catchment was subdivided into three systems, i.e. soils, rivers and lakes. Original data and those previously published by Mogolló;n and Bifano (1994), and Mogolló;n et al. (1995, 1996) were used to establish the numerical relation between the average concentration in the three systems. The percentage labile fraction and metal distribution in different particle size fractions were studied in selected samples. A total of 410 samples was analysed. Lithology and topography are the main factors that differentiate the physicochemical characteristics of soils and sediments. Processes coupled with solid material transport from the upland to lowland area cause the increase of the HNO3 (1 M) extractable metal concentration, and of the percentage labile fraction, metal redistribution towards fine particle fraction. In spite of the tropical climate, the pedogenesis of exposed sediments and the transport along the river courses, have very low influence. Most of the transformations seem to occur during the soils – river transfer of materials. The carbonate precipitation in the lake causes further increase of metal concentration and the percentage labile fraction. The pollutant input increases metal concentration, the percentage labile fraction and the trend of accumulation toward fine particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006754807724
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Lead in particulate deposits and in leaves of roadside plants, Karachi, Pakistan (2000)
    Springer
    The environmentalist 20 (2000), S. 63-67 
    Details
    ISSN: 1573-2991
    Keywords: lead ; pollution ; deposits ; plants ; Karachi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Lead concentrations were determined for particulates which were deposited during one year on the leaves of roadside plants in Karachi. The particulates were collected from the leaves at a height of one metre. The lead accumulated by the leaves of different species was also measured. A statistically significant correlation was found between the number of passing petrol driven vehicles and the lead concentration in the deposits at different designated sites. However, no significant correlation was found between the concentration in the deposits and the lead accumulated by the leaves. A lead concentration of 30.00±6.6 ppm was recorded as the highest concentration in the particulate deposits, while maximum lead accumulated by the leaves was noted as 3.12±1.09 ppm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006608128242
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Release Kinetics of Water Soluble Organic Carbon (WSOC) from River Sediment and Wetland Soil (2000)
    Springer
    Water, air & soil pollution 118 (2000), S. 407-418 
    Details
    ISSN: 1573-2932
    Keywords: DOC ; release kinetics ; sediment ; Water Soluble Organic Carbon (WSOC) ; wetland soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Release kinetics of Water Soluble Organic Carbon (WSOC) from a wetlandsoil and a river bottom sediment were investigated under variousexperimental conditions in the laboratory. The laminar sublayerconcept was applied to model the release process. The resultsindicate that the release process can be characterized by atypical first order equation derived from the laminar sublayermodeling. The mass transfer rate constants of the releaseprocess increased with the increase in flow velocity following apower function. Due to texture difference, the transfer rateconstant of the wetland soil is about one order of magnitudelarger than that of the river bottom sediment. The influences oftemperature and pH on the release kinetics are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005134121710
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Distribution of Heavy Metals in Near-Shore Sediments of the Swan River Estuary, Western Australia (2000)
    Springer
    Water, air & soil pollution 124 (2000), S. 155-168 
    Details
    ISSN: 1573-2932
    Keywords: cadmium ; copper ; estuarine sediments ; heavy metals ; lead ; sequential extraction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Estuarine systems adjacent to urban areas are at risk of contamination by contaminants from anthropogenic sources, such as heavy metals. We anticipated that the sediments of the Swan River estuary, which runs through metropolitan Perth in Western Australia, would show metal contamination related to industrialization and inputs of stormwater. Total Cu, Pb and Cd concentrations, and Cu, Pb, Cr and Zn inoperationally-defined fractions, were determined inseparate sampling exercises in near-shore sediments ofthe upper Swan River estuary.Total metal concentrations in sediments were not high (maximum values of 297 mg kg-1 for Cu, 184 mg kg-1 for Pb and 0.9 mg kg-1 for Cd) when compared with Australian environmental assessmentguidelines for soils. On the basis of linear regressions between sediment metal concentrations andphysicochemical properties of the sediments (pH, organic carbon, particle size distribution), no single parameter could explain the variation in metal concentrations for all metals. Sediment organic carbon content was positively correlated with Cu concentration; Cu concentrations also increased significantly with increasing clay content anddecreasing sand content. Pb concentrations showed a significant increase with increasing sediment pH, and were approximately three-fold higher in sediments adjacent to stormwater drain outfalls than in sediments remote from drains; no such effect was observed for Cu or Cd. No effect of distance downstream was observed. Sequential extraction of sediments showed that most of the metals were in relatively immobile forms, for example bound to Feoxides, or only extractable by aqua regia. The enhanced concentrations of Pb near stormwater outfalls suggest that vehicle-derived Pb may be an important contributor of Pb to the estuary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005289203825
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Soil Contamination by Pb, Zn and Cn from a Lead Smeltery (2000)
    Springer
    Environmental monitoring and assessment 60 (2000), S. 359-366 
    Details
    ISSN: 1573-2959
    Keywords: cadmium ; household dust ; lead ; lead smeltery emissions ; soil contamination ; zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the environment of a lead smeltery contamination with lead, zinc and cadmium was measured over a 15-year period. Efficient bag filters were installed in order to remove dust from the flue gases. This measure of improvement resulted in a drastic reduction of lead, zinc and cadmium content in suspended particles (by 92, 94 and 89%), to a lesser extent in depositions (by 79, 75 and 68%), whereas in household dust the reduction was considerably lower (by 53, 55 and 70%). It can be assumed that household dust contains also redispersed soil particles on which the dust from the smeltery flue gases has deposited over years. To determine to what extent contaminated soil continues to cause increased population exposure directly or through plants or pastures, in the period 1981–1985 the content of metallic ions in the soil was measured at three depths. Selective solubility of soil metallic compounds was analysed in water, in 1 mol ammoniumacetate solution and in 0.05 mol ethylenediaminetetra-acetic acid (EDTA) solution in relation to their solubility in suspended particles, depositions and household dust. A considerably low portion of soluble metallic compounds was found in the soil and physico-chemical characteristics of the soil and portion of metallic ions bound to fulvice and humic acids were determined. The behaviour of metallic ions in contact with soil samples was studied in laboratory and it was found that approximately 50% of lead, 70% of zinc and 7% of cadmium ions change into non-soluble or poorly soluble compounds. By qualitative phase analysis in the non-soluble fraction PbO2, Pb3P4O13, Zn(OH)2, ZnO, Fe2O3 and Cd(OH)2 were identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006167121513
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Nitrogen and Phosphorus Levels in Sediments from Tropical Catatumbo River (Venezuela) (2000)
    Springer
    Water, air & soil pollution 117 (2000), S. 27-37 
    Details
    ISSN: 1573-2932
    Keywords: eutrophication ; nitrogen ; phosphorus ; river ; sediment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Nitrogen (N) and phosphorus (P) concentrations were determined in sediment samples along the bed of Catatumbo river in both Colombian and Venezuelan territories until the river outlet in Maracaibo lake. Total phosphorus was determined by digestion with HCl followed by analysis using the ascorbic acid method and total nitrogen was done using the standard microkjeldahl method plus nitrate-nitrite. Ammonium, orthophosphate and nitrate were determined using standard methods after extraction steps. The mean concentrations along the river bed were found in an interval of 0.035 and 1.492 mg g-1 dry sed. for nitrogen and 0.027 and 1.039 mg g-1 dry sed. for phosphorus at 95% confidence level. The mean molar ratio N/P in the river bed was 4.42 and 3.46 for river outlet zones in the lake, which indicates that nitrogen is the limiting nutrient. For comparison with previous results of lake sediments from sites near the river outlet it was concluded that Catatumbo river is a significant source of nutrients to the Maracaibo Lake system because sediment nutrients concentrations from Catatumbo river were higher than the ones in Maracaibo Lake. Statistic studies showed significant differences between countries, zones and similar behaviour in the river bed as related to the affluent rivers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005189710803
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 11
    Electronic Resource
    Electronic Resource
    Trace Metals in Marine Algae and Sediment Samples from the Bosphorus (2000)
    Springer
    Water, air & soil pollution 118 (2000), S. 27-33 
    Details
    ISSN: 1573-2932
    Keywords: algae ; Bosphorus ; sediment ; trace metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Concentration of As, Cr, Fe, Zn, Co, Sb, Pb, Cd and Cu weredetermined in sediment and algae samples collected from theBosphorus in Turkey. Certain algae species were chosen among thegreen, brown and red algae species at three sampling stations.Element analyses were carried out by atomic absorptionspectrophotometry and instrumental neutron activation analysis. The locations having the highest metal concentrations insediments were as follows: As at Poyraz; Cr, Zn, Sb at RumeliFeneri and Fe, Co at Garipçe. In genral, the accumulation ofmost of the metals showed no direct correlation with algaespecies. On the other hand, C. verticillatus and C. barbataspecies of brown algae showed ability to accumulate arsenic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005149500870
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Lead biogeochemistry in the littoral zones of south-central Ontario lakes, Canada, after the elimination of gasoline lead additives (2000)
    Springer
    Water, air & soil pollution 118 (2000), S. 179-201 
    Details
    ISSN: 1573-2932
    Keywords: atmosphere ; bioaccumulation ; isotope ratios ; lead ; macrophytes ; sediments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Stable Pb isotope ratios were used to trace thesources and pathways of Pb between the atmosphere,surficial sediment fractions, the white water-lilyNymphaea odorata, and waters collected at 26littoral sites in 23 Ontario lakes in summer 1993,three years after alkyl Pb additives were finallyeliminated from Canadian gasoline. Based onsimilarities of isotopic composition, the exchange ofPb between lakewater and sediment 'carbonate', andsubsequently between 'carbonate', 'oxide' and othersediment fractions, was the most likely water-sedimentpathway of Pb movement. pH controlled Pb fractionationwithin surficial sediments, with the 'organic' poolcomprising 80–97% of total Pb in most acidic lakesand 15–60% in alkaline lakes. About 28% of the Pb inN. odorata shoots was accumulated directly fromwater, whereas there was no evidence of root uptake ofPb from sediments. The Pb in plant tissues wasisotopically homogeneous and dissimilar to thevariable composition exhibited in ambient waters andsediments. Plant Pb isotopes strongly resembled thehistorical Canadian atmospheric (alkyl Pb) signature.A possible explanation is that, like essential tracemetals, historically-accumulated Pb was highlyconserved during the annual growth cycle of thislong-lived, clonal macrophyte, being storedover-winter in underground rhizomes and recycled intospring growth. Given the low rate of 'new' Pb uptake,historical alkyl Pb may continue to dominate planttissues for some time, even though it was notdetectable in littoral waters and sediments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005194309413
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    Runoff and Sediment Attenuation by Undisturbed and Lightly Disturbed Forest Buffers (2000)
    Springer
    Water, air & soil pollution 122 (2000), S. 121-138 
    Details
    ISSN: 1573-2932
    Keywords: Soil erosion ; sediment ; water pollution ; forestry ; logging ; buffer strips
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A runoff plot experiment found that ten metre undisturbed forest buffers removed80–90% of runoff and over 95% of sediment produced by logging skid tracks. The study was carried out on 21º slopes in a native forest in eastern New South Wales, Australia. The experiment included three replicates of four treatments including undisturbed control, skid track, skid track + undisturbed buffer and skid track + disturbed buffer. Skid track and control plots were 20 m long by 5 m wide. Buffer plots consisted of a 20 m by 5 m skid track directing runoff to a 10 m by 5 m naturally vegetated buffer that was either undisturbed or lightly disturbed. Runoff and sediment yields from plots were monitored over two successive summers. Undisturbed buffers greatly reduced overland flow and decreased sediment yields from around 100 Mg ha1 to less than 0.5 Mg ha-1. Differences in both runoff and sediment yield between undisturbed buffer and control treatments were minimal and not statistically significant. Disturbed buffers achieved similarly large reductions in runoff and sediment yield in two out of three replicates. The third replicate yielded as much or more runoff and sediment than the skid track plots suggesting that disturbance increased the risk of buffer failure. The peak rate of outflow from buffer plots was generally not related to peak buffer inflow until a threshold inflow of 1.6 L s-1 was reached, after which peak outflow and peak inflow were linearly related.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005283403178
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 14
    Electronic Resource
    Electronic Resource
    Speciation of As(III) and As(V) in some Ghanaian Gold Tailings by a Simple Distillation Method (2000)
    Springer
    Water, air & soil pollution 122 (2000), S. 317-326 
    Details
    ISSN: 1573-2932
    Keywords: arsenic ; distillation ; gold tailing ; neutron activation analysis ; sediment ; speciation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract As(III) and As(V) in goldtailings and river-bedsediments from Obuasi were determined by distillationof arsenic as AsCl3. Results yielded 3750±426 mg kg-1 (45.2%) for As(V) and 3050±66 mg kg-1 (36.7%) for As(III) in the tailings. In the river-bed sediments, one spot yielded: As(III) 0 mg kg-1 (0%) and As(V) 1447±51 mg kg-1 (100%), whilst a second spot yielded: As(III) 0 mg kg-1 (0%) and As(V) 2976±51 mg kg-1 (100%). Using arsenic oxide standards, the recovery of As(III) and As(V) in the trioxide were 94.8 and 0.6% respectively. In a mixture of the two oxides, the recovery of As(III) was 87.6% with practically no interference from As(V). Total As content of the tailings was determined by neutron activation analysis (NAA) to be 8305±75 mg kg-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005286832435
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 15
    Electronic Resource
    Electronic Resource
    Selective Removal of Lead from Calcareous Polluted Soils using the Ca-EDTA Salt (2000)
    Springer
    Water, air & soil pollution 122 (2000), S. 351-368 
    Details
    ISSN: 1573-2932
    Keywords: contaminated soil ; EDTA ; lead ; removal of lead ; treatment of calcareous soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract EDTA is a powerful chelating reagentwhich has been often proposed for the decontaminationof lead polluted soils. Despite the pronouncedselectivity of this reagent for Pb, a low degree ofutilisation is observed when treating calcareoussoils, due to the co-dissolution of calcite. Thisstudy demonstrates that it is possible to suppresscalcite dissolution and optimise the degree of EDTAutilisation, using the calcium salt of EDTA, insteadof the common sodium salts. Initial experiments, whichwere carried out mixing pure cerrusite (PbCO3)with a Na2CaEDTA solution, have shown that Pb isquantitatively solubilised, while calcium precipitatesin the form of aragonite. The performance of thisreagent in the decontamination of soils has beentested on a soil sample from Lavrion (Greece)containing 7.3–8.8% of Ca and heavily polluted withPb at levels up to 3.5%. The parameters which weretested include the reaction time, the stoichiometricexcess of Na2CaEDTA with respect to Pb and theeffect of successive treatment stages with freshNa2CaEDTA solutions. The experimental resultshave shown that long reaction times, exceeding 24 hr, are required in order to obtain sufficient Pbremoval and preserve the calcium content of the soil.Lead extraction increases from 27 to 40% prolongingthe reaction time from 1 to 24 hr atNa2CaEDTA/Pb = 1 mol/mol. Increasing theNa2CaEDTA/Pb molar ratio from 1 to 3.5 mol/mol,enhances the dissolution of Pb from 40 to 53%, whichis not proportional to the stoichiometric excesssupplied. The efficiency of Pb removal is maximized,up to 75%, applying three successive leaching stages.The major benefit of Na2CaEDTA in comparison withthe disodium EDTA salt is the preservation of soilcalcite. The initial calcium content of the soil wasfound to increase by 4% using the Ca salt; on thecontrary, the treatment with Na2H2EDTA undersimilar experimental conditions has resulted indissolving 27% of soil Ca.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005295119231
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 16
    Electronic Resource
    Electronic Resource
    Lead Accumulation in Quercus Nigra and Q. Velutina near Smelting Facilities in Alabama, U.S.A. (2000)
    Springer
    Water, air & soil pollution 118 (2000), S. 1-11 
    Details
    ISSN: 1573-2932
    Keywords: air pollution ; atmospheric deposition ; dendrochemistry ; lead ; tree rings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Lead is very toxic and if ingested cancause severe health problems to both animals andhumans. To determine if lead accumulation in treescould provide a direct pathway to enter the foodchain, oaks (Q. nigra or Q. velutina)growing near two lead smelting facilities in Alabama,U.S.A., were analyzed for lead in acorns, leaves and treecores. A relatively pristine site was used as acontrol. Lead was not detected in acorns collected atany site, and was only found in tree cores from thesites near smelters. Significant increases in treecore lead from 1975–1995 were detected at the activesmelter site. Results were different from the inactivesmelter site; lead increased in tree cores until thesmelter ceased operation, then decreased afterclosing. Soil lead decreased linearly with distancefrom both smelters. In addition, a significantpositive relationship was observed between leaf andsoil lead at the site with the active smelter, andmay be the result of both translocation via treeroots, and foliar absorption of deposited lead ionsinto the leaf structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005138313978
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 17
    Electronic Resource
    Electronic Resource
    Heavy Metal Pollution by Atmospheric Transport in Natural Soils from the Northern Part of Eastern Carpathians (2000)
    Springer
    Water, air & soil pollution 120 (2000), S. 347-358 
    Details
    ISSN: 1573-2932
    Keywords: atmospheric pollution ; cadmium ; cobalt chromium ; copper ; lead ; manganese ; nickel ; Romania ; soil contamination ; zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The present paper is a study of the heavy metal contamination ofnatural soils due to atmospheric transport in the northern partof Eastern Carpathians. The study area is located north of BaiaMare, the main Romanian centre for processing complex sulphideores. Ten undisturbed soil profiles of andosols and andic soilswere investigated. The distribution of heavy metals (Pb, Cu, Zn,Mn, Ni, Co, Cr and Cd) was studied along the soil profile and atspecific distances from the pollution sources. In addition tothe total nitric acid soluble fraction of the metals, amounts oflead, copper, zinc and manganese extractable with 0.05 Mhydrochloric acid were determined to evaluate the fraction ofeach metal potentially available to plants. Surface soils in theIgnis Mountains (10 km from Baia Mare) were more polluted withlead (200–800 ppm), with the concentration decreasing withdistance from the processing plants. Lower lead concentrationswere observed in the deeper soil horizons. The fraction of leadextractable in 0.05 M hydrochloric acid was generally higher athigh total concentrations of lead. From its geographical andsoil profile distributions it is also evident that cadmium wasalso supplied in appreciable amounts to the topsoil from thesame polution sources, whereas the trend was weaker for zincand chromium and not evident for copper, manganese, nickel, orcobalt. The fraction extractable with 0.05 M hydrochloric acidgenerally followed the order Pb 〉 Cu 〉 Zn 〉 Mn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005255718970
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 18
    Electronic Resource
    Electronic Resource
    Methyl Mercury Production and Distribution in River Water-Sediment Systems Investigated Through Radiochemical Techniques (2000)
    Springer
    Water, air & soil pollution 124 (2000), S. 113-124 
    Details
    ISSN: 1573-2932
    Keywords: bioturbation ; freshwater systems ; methylation ; sediment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The toxicological consequences of Hg releases to the environment are largely governed by the conversion ofinorganic Hg to the most toxic methylmercury (MeHg), that is biomagnified through aquatic food chains. To gain further insight on the biological and physico-chemical factors controlling MeHg production and distribution among freshwater sediments and water, we used a sensitive and specific radiochemical procedure, developed at the National Institute for Minamata Disease. Systems containing 203Hg2+-spiked sediment cores (0.7 μg total Hg g-1 d.w.) and overlying water, both from a pristine mountain stream in Southern Japan, were incubated for 21–38 days in different conditions. Inorganic Hg and MeHg in sediment and water were extracted in dithizone-benzene and measured after separation by thin-layer chromatography. The conversion of added Hg to MeHg was 3.0 to 13.7% in sediments, with a tendency for higher proportions in the top layers. Surprisingly, more MeHg was found in the sediment (11.3%) and water (66.5%) of a system bubbled with air than in one bubbled with nitrogen (4.2 and 44.1%). Artificially increased levels ofbioturbation reduced by half the MeHg concentrationsand % of added total Hg in sediment and water. In allsystems, 55–68% of total Hg and MeHg in water wereassociated to suspended particles 〉1μm. MeHgbioaccumulation factors (BFs) from water ranged270–8100 and from sediment, 0.2–5.7 (wet weight basis). BFs in relation to water where 3 times higher for MeHg than for total Hg.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005206109083
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 19
    Electronic Resource
    Electronic Resource
    Effects of lead administerd to pregnant rats on the brain of their offspring (Delayed consequences) (2000)
    Springer
    Bulletin of experimental biology and medicine 129 (2000), S. 21-23 
    Details
    ISSN: 1573-8221
    Keywords: brain ; offspring ; lead
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Low neuronal density in the neocortex, low serotonin concentration in the brain stem and hemisphere, 2-fold reduced norepinephrine content in the brain stem, and behavioral disorders were found in 40-day-old offspring of female rats treated with lead on day 18 of pregnancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02433857
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...