Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Spatial distribution and environmental characterization of sediment-associated metals from middle-downstream of Xiangjiang River, southern China
Ist Teil von
Journal of Central South University of Technology, 2010-02, Vol.17 (1), p.68-78
Ort / Verlag
Heidelberg: Central South University
Erscheinungsjahr
2010
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The contamination and environmental risk assessment of the toxic elements in sediments from the middle-downstream （Zhuzhou---Changsha section） of the Xiangjiang River in Hunan Province of China were studied. The results show that As, Cd, Pb and Zn are major contaminants in sediments, and average concentrations of these elements significantly exceed both the Control Standards for Pollutants in Sludge of China （GB4284--84） for agricultural use in acidic soils and the effect range median （ERM） values. The average concentrations of As, Cd and Pb in the river water slightly exceed the limit of Surface Water Environment Quality Standard （GB3838--2002）. The concentrations of As and Cr in depth profiles extensively change, but slight changes are observed in Pb and Zn. Cd and Zn in most sediment samples can easily enter the food-chain and bring possible ecotoxicological risk to organisms living in sediments according to the risk assessment code.