Spatial distribution and environmental characterization of sediment-associated metals from middle-downstream of Xiangjiang River, southern China |
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| Authors: | Zhao-hui Guo Jie Song Xi-yuan Xiao Hui Ming Xu-feng Miao and Feng-yong Wang |
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| Affiliation: | [1]Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Education, Zhejiang University, Hangzhou 310029, China [2]College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029, China [3]School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China [4]Centre for Environmental Risk Assessment and Remediation, Mawson Lakes Campus, University of South Australia, SA 5095, Australia |
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| Abstract: | 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. |
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| Keywords: | sediment toxic elements spatial distribution environmental risk Xiangjiang River |
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