Contamination, Fractionation and Biological Risk Related to Metals in Surface Sediments from the Largest Deep Freshwater Lake in China
文献类型： 外文期刊
作者： Li, Hua-Bing 1 ; Gu, Yang-Guang 2 ; Wang, Rong 1 ; Lu, Hui-Bin 1 ;
作者机构： 1.Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
期刊名称：ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY （ 影响因子：2.804； 五年影响因子：3.399 ）
ISSN： 0090-4341
年卷期： 2017 年 72 卷 1 期
页码：
收录情况： SCI
摘要： The toxicity and mobility of metals in the environment are driven by their specific chemical forms and binding states. However, heavy metal fractionation in sediments from plateau deep lakes in China is rare. This study analyzed surface sediments collected from Fuxian Lake, the largest deep freshwater lake in China; parameters examined included total metal concentrations, chemical partitioning, and biological risk assessment. The average total concentrations (mg/kg) were 7.9 for Cd, 97.6 for Pb, 102.8 for Cr, 60.8 for Ni, 73.6 for Cu, and 112.9 for Zn; these levels were significantly higher than their corresponding background values. Cd was preferentially associated with the acid-soluble fraction; significant portions of the Pb, Cr, Ni, Cu, and Zn were mainly associated with the residual fractions. Overall, surface sediments of Fuxian Lake were associated with a 21% incidence of toxicity based on the mean effects range-median quotient. Cd was mainly at high or very high risk levels, and Cu and Zn were mainly at medium or high risk levels based on the risk assessment code (RAC).
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