• 研究报告 •

沙颍河流域沉积物重金属污染特征及生态风险评价

1. （南京大学生命科学学院， 南京 210046）
• 出版日期:2016-07-10 发布日期:2016-07-10

Pollution characteristics and ecological risk assessment of heavy metals in the sediments of Shaying River.

ZHONG Ming, WAN Yun, WAN An, HU Jin, AN Shu-qing, LENG Xin*

1. (School of Life Science, Nanjing University, Nanjing 210046, China).
• Online:2016-07-10 Published:2016-07-10

Abstract: In order to understand the pollution status of heavy metals in the sediments of Shaying River, we acquired the surface sediments and determined the concentrations of 7 heavy metals (As, Cd, Cr, Cu, Hg, Pb, and Zn) in May 2013. The results showed that the average contents of As, Cd, Cr, Cu, Hg, Pb, and Zn were 8.49, 0.35, 51.4, 27.2, 0.094, 26.8, and 111.8 mg·kg-1. Average contents of Cd, Cu, Hg, Pb, and Zn elements were higher than the background values in soils of Henan Province. These five heavy metals were influenced by human activities at varying levels. The heavy metal contamination in sediments estimated by geo-accumulation index (Igeo) followed the order: Cd>Hg>Zn>Pb>Cu>Cr>As. The pollution of Cd was the most serious, and 91.43% of the samples were contaminated by Cd. The result of potential ecological risk index showed that the ecological risk of the heavy metals was: Cd>Hg>As>Cu>Pb>Zn>Cr. Cd showed a very strong risk, Hg was  of strong risk, and the other 5 kinds were of low risk. The heavy metals pollution of Zhoukou section of Yinghe River and its tributaries Jialu River and Qingyi River were prominent, which should arouse the attention of the local environmental protection departments.