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Accumulation and risk assessment of heavy metals in water, sediments, and aquatic organisms in rural rivers in the Taihu Lake region, China

文献类型： 外文期刊

作者： Bo, Luji 2 ; Wang, Dejian 1 ; Li, Tianling 3 ; Li, Yan 2 ; Zhang, Gang 1 ; Wang, Can 1 ; Zhang, Shanqing 3 ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China

2.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Peoples R China

3.Griffith Univ, Environm Futures Ctr, Gold Coast, Qld 4222, Australia

4.Griffith Univ, Sch Environm, Gold Coast, Qld 4222, Australia

关键词： Heavy metals;Sediment;Rural;Aquatic organisms;Accumulation;Risk assessment

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Concentrations of heavy metals (Cd, Cr, Cu, Ni, Pb, and Zn) were measured in water, sediments, Ceratophyllum (hornwort), and Bellamya sp. (edible snail) from residential, mixed (industrial and commercial), and agricultural areas with rural rivers in the Taihu Lake region, China. Zn concentrations were the highest, whereas Cd concentrations were the lowest among the six metals in water, sediments, and aquatic organisms. Cd was mainly present in the acid-soluble fraction, Cr in the residual fraction, and Pb in the reducible fraction of sediments. Heavy metal concentrations in water, sediments, and aquatic organisms in the three areas followed the order of the mixed area > residential area > agricultural area. Heavy metal concentrations in aquatic organisms were not only related to total metal concentrations in water and sediments but also to metal speciation concentrations in sediments. In addition, the bio-concentration factor (BCF) values of Cr, Cu, Pb, and Zn for Bellamya sp. were higher than those for Ceratophyllum, whereas the BCF values of Cd and Ni for Bellamya sp. were lower than those for Ceratophyllum. An ecological risk assessment of heavy metals in sediments showed that Cd posed the highest ecological risk to the environment. A health risk assessment showed that consuming Bellamya sp. from the mixed area could cause a potential health risk.

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