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Spatial distribution and environmental characterization of sediment-associated metals from middle-downstream of Xiangjiang River,southern China 被引量:8

Spatial distribution and environmental characterization of sediment-associated metals from middle-downstream of Xiangjiang River, southern China
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摘要 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. 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.
出处 《Journal of Central South University》 SCIE EI CAS 2010年第1期68-78,共11页 中南大学学报(英文版)
基金 Project (20507022) supported by the National Natural Science Foundation of China Project (EREH050303) supported by the Foundation of Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health
关键词 SEDIMENT toxic elements spatial distribution environmental risk Xiangjiang River 沉积物 空间分布 环境特性 中国 地表水环境质量标准 湘江 环境风险评估 污染物控制
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