Behaviour of heavymetals in a mud flat of the Scheldt Estuary, Belgium
Belgique ; Estuaire ; Métal lourd ; Pollution
On the Ballasplaat intertidal mud flat pollution is not uniform, due to varying physico-chemical conditions (essentially variable redox profiles). The transportation of heavymetals across the sediment water interface is very much depending upon
Heavymetal concentrations 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 metal concentration 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 metal concentrations
Assessment on heavymetals pollution of agricultural soil in Guanzhong District
China ; Cultivated land ; Geochemistry ; Heavymetals ; Irrigation ; Pollution ; Shaanxi ; Soil
Chine ; Géochimie ; Irrigation ; Métaux lourds ; Pollution ; Shaanxi ; Sol ; Sol cultivé
This research selected 2 irrigated areas of Heihui and Jiaokou in Guanzhong Plain, and 2 river valleys of Qianhe and Jinghe on the Loess Plateau of Weibei as the typical investigated and evaluated areas, and discussed heavymetals contents
Accumulation rates of airborne heavymetals in wetlands
Core sampling ; Drainage ; Ecosystem ; Geochemistry ; Heavymetals ; Humid environment ; Indiana ; Industrial pollution ; Sedimentology ; Soil pollution ; United States of America
Carottage ; Drainage ; Ecosystème ; Etats-Unis ; Géochimie ; Indiana ; Milieu humide ; Métaux lourds ; Pollution du sol ; Pollution industrielle ; Sédimentologie
Accumulation rates of heavymetals (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 heavymetals.
concentrations for 22 sediment cores are determined by ICP-AES after ashing and strong acid extraction. Relations between organic content and metal concentrations at depth are used to separate natural and anthropogenic sources. The results provide important
The forecast climatic warming will cause hydrological changes on Earth which will be accompanied by changes to the chemism and quality of waters. On account of their wide-spread occurrence and permanence, it is heavymetals in the bottom sediments
forms. For this reason, heavymetals have been termed chemical time bombs.
A total of 219 agricultural soil and 48 vegetable samples were collected and investigated from the midstream and downstream of the Xiangjiang River (the Hengyang-Changsha section). The characteristics of soil contamination and heavymetals
in agricultural soils and vegetables were studied to evaluate the soil environmental quality. It is very necessary to focus on the potential risk of heavymetals for food safety and human health in these agricultural soils and vegetables.
Atmospheric deposition of heavymetals to North European marginals seas: scenarios and trend for lead
Aerosol ; Atmosphere ; Atmospheric circulation ; Europe ; Heavymetals ; Human impact ; Lead ; Model ; North Sea ; Northern Europe ; Numerical model ; Pollution
Action anthropique ; Atmosphère ; Aérosol ; Circulation atmosphérique ; Europe ; Europe du Nord ; Mer du Nord ; Modèle ; Modèle numérique ; Métaux lourds ; Plomb ; Pollution
The contribution of the atmosphere to the input of heavymetals to marine environments of Northern Europe is determined by applying an EMEP-type Lagrangian trajectory model. The results show that the model is capable of simulating long-range
transport of heavymetals from European anthropogenic sources to the North Sea and the Baltic Sea including emission reduction scenarios for lead.
This review discusses the research available on the sources and impacts of 3 heavymetals, (copper, zinc, nickel), and polycyclic aromatic hydrocarbon (PAH) contamination on macroinvertebrate communities in streams. The literature evidence
chemistry and the interaction effects of metals and PAHs.
A total of 118 of agricultural soil and 43 of vegetable samples were collected from Dongguan City, Guangdong, China. The spatial distribution, sources, accumulation characteristics and potential risk of heavymetals in the agricultural soils
and vegetables were depicted in details by 3 different approaches, including total contents of eight metal elements in soils and vegetables, GIS maps and multivariate analysis of heavymetals in soils in the study. The results show that there are higher
accumulation of heavymetals in agricultural soils. It is necessary to focus on potential risk of heavymetals for food safety and human’s health from agricultural soils and vegetables in Dongguan City.
of heavymetals in floodplain soils and sediments along the Alamosa River, 2) examine the spatial distribution of metals with distance downstream from the mined area of the watershed, and 3) use the spatial pattern of heavymetals to reconstruct past flood
and geomorphic history in the watershed. Heavymetals found below the reservoir may have been released to the watershed and deposited before 1912 during a period of earlier mining activity, or during flooding in 1970 and 1971 when water overtopped the dam
. The results of this study suggest the complex fashion in which heavymetals move through the fluvial system.
Acción antrópica ; Acumulación fluviátil ; Chensi ; China ; Contaminación ; Corriente de agua ; Crecida ; Geoquímica ; Gestión del agua ; Metales pesados
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 heavymetal assessment. It is highlighted that the source of Co, Cr, Ba and V is mainly from
anthropogenic inputs, but the source of Cu, Ni, Pb, Zn and Mn is mixed from natural and anthropogenic inputs. Concentration of heavymetals in the downstream of Ankang city is higher than that in the upstream. These results would help to establish non-point
sources of heavymetal pollution and provide important information for water conservation strategy during the great flood periods in the upper Hanjiang River basin.
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
Geochemical behavior assessment and apportionment of heavymetal contaminants in the bottom sediments of lower reach of Changiang River
China ; Geochemistry ; Heavymetals ; Jiangsu ; Pollution ; Principal components analysis ; River bed ; Sediment load ; Stream
Analyse en composantes principales ; Changjiang ; Charge solide ; Chine ; Cours d'eau ; Géochimie ; Jiangsu ; Lit fluvial ; Métaux lourds ; Pollution
Análisis en componentes principales ; Carga solida ; Cauce ; China ; Contaminación ; Corriente de agua ; Geoquímica ; Jiangsu ; Metales pesados
From sediment samples collected in the lower reach of Changjiang River (from Nanjing to Shanghai), the AA. examine the correlation between heavymetals and geochemical indices, including Fe2O3, Al2O3, total organic carbon (TOC) and black carbon (BC
), as well as magnetic susceptibility (MS). Using these indices they investigate the contamination characteristics of heavymetals in the sediments with Principal Component Analysis (PCA). The results indicate that the combination of geochemical
and multivariable statistical methods clearly characterizes the geochemistry of heavymetals in sediment of the lower reaches of the Changjiang River and suggests that power plants are the main source of heavymetal pollution.
Cartographie thématique ; Eau souterraine ; Hongrie ; Métaux lourds ; Nitrate ; Pente de versant ; Pollution ; Propriétés du sol ; Ruissellement ; Sol
This paper investigates how geomorphological conditions and human activities influence the extent of nitrate contamination of groundwater. An attempt was made to plot a map of nitrate-contamination hazard. The areal distribution of heavymetal
contamination was studied in a dry valley and on slopes of different exposure. A correlation between landforms and heavy-metal concentrations in the soil was sought for. The sample area was located near Cserépfalu in the Bogács basin.
Evaluation of water quality pollution indices for heavymetal contimation monitoring. A study case from Akpabuyo-Odukpani area, Lower Cross River Basin (southeastern Nigeria)
Geochemistry ; Heavymetals ; Index ; Nigeria ; Pollution ; Surface water ; Water quality
Eau de surface ; Géochimie ; Indice ; Métaux lourds ; Nigéria ; Nigéria du Sud ; Pollution ; Qualité de l'eau
has proved to be a useful tool to separate geological and anthropogenic causes of variation in soil heavymetal content and to identify common pollution sources.
Alpes ; Bosque ; Contaminación ; Contaminación atmosférica ; Degradación del medio ambiente ; Dendrología ; Europa ; Italia ; Metales pesados ; Montaña
Air pollution dispersal in the European Alps has been studied both for glacial and forest environments. In this study, chemical elements and heavymetals in the tree rings were analyzed for seven sites of European larch (Larix decidua Mill
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 metal concentration 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.
China ; Geochemistry ; Heavymetals ; Human impact ; Lake ; Loess ; Pollution ; Sedimentation ; Stream ; Suspended load ; Trace-element ; Water quality
Action anthropique ; Charge en suspension ; Chine ; Cours d'eau ; Elément-trace ; Géochimie ; Lac ; Loess ; Métaux lourds ; Pollution ; Qualité de l'eau ; Sédimentation
Caractéristiques géochimiques des éléments dans les sédiments en suspension du Fleuve Jaune. Etude de la spéciation physico-chimique des métaux lourds dans les eaux des rivières et lacs, vallée du Changjiang. Impact de la pollution des métaux sur la
qualité des eaux du lac Taihu. Pollution par les métaux lourds des sédiments des lacs Dianchi, Erhai et Poyanghu. Une nouvelle méthode de calcul de la moyenne pour les données de l'environnement. Fractionnement et chloration du carbone organique dans l'eau