Heavy metalconcentrations in soils and crops of Baoshan-Wusong area, Shanghai, China
Agropédologie ; Chine ; Ecosystème ; Environnement ; Géographie physique ; Métal lourd ; Pollution ; Propriété du sol ; Shanghai ; Sol ; Statistique
The AA. study the spatial distribution of metalconcentration in soils and crops and determine abnormal differences in metal content between the samples and regional background. Statistical data reveal that the high level of metalconcentrations
As the total metalconcentrations exponentially decrease along the 40 km distance away from the source area, the percentage of metals in three potentially mobile fractions steadily increases. It is concluded that despite the rapid decay of total
metalconcentrations, large amounts of potentially mobile metals are probably stored in the floodplain sediments even at a large distance from the source area.
Selective extractions and heavy-liquid analyses were used to assess the chemical forms of sediment-associated metal and the relationship between grain size, density and metalconcentration and to identify sources of metalliferous material
. The results are also discussed in a wider context of particulate metal transport in rivers and recommendations are made for refining density-based models of metal dispersal.
Dammed lake ; European part of Russia ; Heavy metals ; Hydrochemistry ; Interannual variability ; Lacustrine sediment ; Lake ; Moscow ; Pollution ; Spatial variation ; Water supply
Variabilité spatio-temporelle des concentrations de métaux lourds de 1989 à 1998.
Biogeochemistry ; European part of Russia ; Freshwater environment ; Heavy metals ; Hydrobiology ; Lake ; Pollution ; Reservoir ; Upper valley ; Vegetation ; Volga
L'A. étudie la concentration des métaux lourds dans deux espèces d'épis d'eau du réservoir d'eau de Gorki. Il effectue une analyse comparée de l'accumulation d'éléments dans les plantes des lacs artificiels en série sur la Haute-Volga.
Asian part of Russia ; Baikal ; Biocenosis ; Biology ; Biomass ; Biota ; Heavy metals ; Lake ; Pollution ; Siberia ; Water pollution
Hydrobiotes dominants et biomasses globales des sous-systèmes de la biocénose du lac Baïkal. Concentration des métaux lourds (mg/kg) dans la biomasse sèche de quelques hydrobiotes du lac.
Accumulation rates of airborne heavy metals in wetlands
Carottage ; Drainage ; Ecosystème ; Etats-Unis ; Géochimie ; Indiana ; Milieu humide ; Métaux lourds ; Pollution du sol ; Pollution industrielle ; Sédimentologie
Core sampling ; Drainage ; Ecosystem ; Geochemistry ; Heavy metals ; Humid environment ; Indiana ; Industrial pollution ; Sedimentology ; Soil pollution ; United States of America
concentrations for 22 sediment cores are determined by ICP-AES after ashing and strong acid extraction. Relations between organic content and metalconcentrations at depth are used to separate natural and anthropogenic sources. The results provide important
Accumulation rates of heavy metals (Cd, Cr, Cu, Mn, Pb, and Zn) retained in wetland sediments in northwest Indiana, downwind of the Chicago-Gary-Hammond industrial area, are quantified to assess anthropogenic influences on atmospheric fluxes. Metal
information on the effect of different management regimes, specifically drainage, and on the retention of heavy metals.
Segment-scale patterns and hydraulics of trace metalconcentrations in fine grain sediments of a cobble and boulder bed mountain stream, southeast Alaska
Results indicate that there are no consistent downstream trends typical of those associated with tributary mixing at basin scales or with geochemical variability at segment-scales. Little in this work supports the concept of metal-rich or depleted
in groundwater, in areas contaminated by tailings deposits. Vertical trends in concentrations of metals show that they are distributed based on apportionment of metal phases between reducing oxidizing environments and pH fluctuations.
Sites were established where sediments and water throughout the stratigraphic section were collected and analyzed. Chemical analyses indicate enriched concentrations of cadmium, copper, manganese, and zinc in sediments and porewater, and arsenic
The dispersal of metal minig wastes in the catchment of the river Geul (Belgium-The Netherlands).
Bassin-versant ; Belgique ; Cours d'eau ; Geul ; Géographie de l'Europe ; Mine ; Métaux ; Pays-Bas ; Pollution ; Transport solide
The study area covers the catchment of the transboundary river Geul in Belgium and the Netherlands. The fluvial dispersal of mining wastes has caused enhanced concentrations of lead, zinc and cadmium in aquatic sediments and flooplain soils in both
countries. The objective of this study is to investigate quantitatively the dispersal of metal mining wastes in this catchment. - (AGD)
Concentrations of metals in very small volumes of soil solutions
Cation ; Composition ; Echantillonnage ; Géographie physique ; Métaux ; Sol ; Solution du sol
Une nouvelle méthode de prélèvement de faibles quantités de solution du sol (0,3g) montre que les solutions du sol contiennent de fortes concentrations et des proportions insolites de métaux. Dans les sols étudiés, la solution est proche, tant en
Assessment of nutrient and heavy metal contamination in surface water and sediments of the upper Tigris River, Turkey
Action anthropique ; Alluvion ; Analyse des groupes ; Anatolie ; Cours d'eau ; Eau de surface ; Ecosystème aquatique ; Exploitation minière ; Métaux lourds ; Pollution ; Qualité de l'eau ; Tigris ; Turquie
Alluvium ; Anatolia ; Aquatic ecosystem ; Cluster analysis ; Heavy metals ; Human impact ; Mining activity ; Pollution ; Stream ; Surface water ; Turkey ; Water quality
Acción antrópica ; Agua de superficie ; Aluvión ; Anatolía ; Análisis de grupos ; Calidad del agua ; Contaminación ; Corriente de agua ; Ecosistema acuático ; Explotación minera ; Metales pesados ; Turquía
The concentrations of total nitrogen (TN), total phosphorus (TP), As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn in both surface water and sediment samples from the upper Tigris River were determined to evaluate the level of contamination. All metal
concentrations in water samples, except Cu, were lower than the maximum permitted concentration for the protection of aquatic life. TN, TP and metalconcentrations in sediment samples from the first three sites situated downstream of Ergani Copper Mine Plant were
much higher than those at other sites. There was a significant decrease in the concentrations of heavy metals in sediment from the last site downstream of the Dicle Dam. Cluster analysis suggests that As, Cd, Co, Cu, Ni, Pb and Zn are derived from
anthropogenic sources, particularly metallic discharges of the copper mine plant.
Biogeochemistry ; European part of Russia ; Hydrochemistry ; Lake ; Metals ; Reservoir ; Water ; Water pollution
Etude de certains micro-éléments, métaux catalyseurs des processus biogéochimiques : manganèse, cuivre, zinc, plomb. Leur concentration et leur répartition dans l'eau du réservoir de Bratsk ne sont pas homogènes. Ces métaux sont étudiés en priorité
parce que, lorsque leur concentration augmente, ils peuvent être transformés en agents toxiques. - (MMB)
Analyse des concentrations en métaux dans les sédiments de la plaine d'inondation de la Rheidol. Ces concentrations varient avec les remaniements des sédiments par le cours d'eau et l'ancienne activité minière de la région. Discussion de la teneur
Concentrations of heavy metals and polycyclic aromatic hydrocarbons in river sediments: geochemical background, man's influence and environmental impact in Water pollution.
Analyse sédimentaire pour détecter les sources polluantes. Parmi les différents groupes de polluants ayant une grande affinité avec les sédiments on note pour leur importance les métaux lourds et les hydrocarbones. Evolution de la teneur des
Dépendance de la concentration de métaux lourds dans les sols des villes par rapport au niveau de la pollution de l'air
Métaux lourds ; Pollution ; Pollution atmosphérique ; Pollution du sol ; Sol ; Ukraine ; Ville
Atmospheric pollution ; Heavy metals ; Pollution ; Soil ; Soil pollution ; Town ; Ukraine
L'A. présente les résultats de l'étude du rapport entre la concentration, dans les sols urbains, de formes solubles de manganèse, zinc, cuivre, plomb et la concentration pluriannuelle moyenne de ces métaux dans les aérosols de 23 villes d'Ukraine
China ; Flood ; Fluvial deposit ; Geochemistry ; Heavy metals ; Human impact ; Pollution ; Shaanxi ; Stream ; Water management
Acción antrópica ; Acumulación fluviátil ; Chensi ; China ; Contaminación ; Corriente de agua ; Crecida ; Geoquímica ; Gestión del agua ; Metales pesados
anthropogenic inputs, but the source of Cu, Ni, Pb, Zn and Mn is mixed from natural and anthropogenic inputs. Concentration of heavy metals in the downstream of Ankang city is higher than that in the upstream. These results would help to establish non-point
Modern flood slackwater deposits (SWD) were systematically collected after the great flood events which occurred on 19 July, 2010 and on 19 September, 2011 downstream of Ankang City along the upper Hanjiang River valley. Concentrations of heavy
metals (Co, Cr, Cu, Ni, Pb, Zn, Ba, Mn and V) in the fresh flood SWD were determined. Enrichment Factor (EF) and Index of Geoaccumulation (Igeo) were employed for heavy metal assessment. It is highlighted that the source of Co, Cr, Ba and V is mainly from
sources of heavy metal pollution and provide important information for water conservation strategy during the great flood periods in the upper Hanjiang River basin.
Centrality ; Cluster ; Connectivity ; Creative industry ; Finland ; Helsinki ; Industry ; Music ; Network ; Spatial concentration
This study focuses on the creative individuals of a distinct music genre: namely, the bands and artists of the Finnish metal music genre. It shows that they tend to cluster in the largest cities. There are, however, some exceptions—very small
municipalities (in terms of population) with a fair number of metal bands. Still, the capital Helsinki is the most prominent cluster of metal music in Finland. A further social network analysis reveals that the metal music cluster of Helsinki has a network
Cours d'eau ; Danube ; Ecosystème aquatique ; Europe ; Ex-Yougoslavie ; Faune ; Hongrie ; Milieu dulçaquatique ; Métaux lourds ; Poisson ; Pollution ; Pollution de l'eau
Aquatic ecosystem ; Danube ; Europe ; Fauna ; Fish ; Former Yugoslavia ; Freshwater environment ; Heavy metals ; Hungary ; Pollution ; Stream ; Water pollution
, Vimba, Zingel, Stizostedion (Yougoslavie). Les métaux lourds (Cu, Zn, Cd, Mn, Fe, Pb, Co, Ni, Sr et Cr) ont été identifiés dans les nageoires, branchies, écailles, peau, etc. Analyse comparée de la concentration des métaux lourds chez les poissons des
of metal dispersal and storage and how these vary according to different sedimentary environments. Although the total metalconcentrations in the Gruben River valley sediments are extremely high and are in themselves a concern, the small percentage
of metals held in the exchangeable phase and the low potential for remobilisation under the arid conditions would suggest that they pose only a minor risk to the environment.