农业环境科学学报2017，Vol.36Issue(3)：574-582,9.DOI:10.11654/jaes.2016-1325
安庆沿江湖泊及长江安庆段沉积物重金属污染特征及生态风险评价
Pollution characteristics and ecological risk assessment of heavy metals in the sediments from lakes of Anqing City and Anqing section of Yangtze River
摘要
Abstract
To investigate pollution characteristics and ecological risk assessment of heavy metals in the sediments from lakes of Anqing City and Anqing section of Yangtze River, the pollution characteristics of 4 heavy metals including Cu, Zn, Pb and Cd were analyzed in 58 sur-face sediment samples from lakes of Anqing City and Anqing section of Yangtze River, and the ecological risk assessment was evaluated us-ing geo-accumulation index(Igeo)and potential ecological risk index(RI). Results showed that:The concentrations of heavy metals varied greatly in different lakes. The heavy metals in the urban lakes were generally higher than other detected lakes and river. Comparing with the soil background value of Yangtze River basin, the concentration of all 4 heavy metals in sediment samples from urban lakes were higher generally, while heavy metals in other sediment samples were close to the value of soil background, which means human activities such as industrial production and resident's life in urban areas influencing on the content of heavy metals in lake sediments. Igeo also indicated that urban lakes were contaminated by heavy metals among all detected lakes and river, especially Cd, which coming up to moderate pollution. Generally, the order of heavy metal pollution in the sediments of the lakes and river in this study was Cd, Pb, Zn and Cu. The results of eco-logical risk assessment indicated that the ecological risk in urban lakes and Caizi Lake were in middling level, while other lakes and river were slight. The order of ecological risk in these study areas was urban lakes, Caizi Lake, Anqing section of Yangtze River, Xizi Lake, Shi-men Lake and Baidang Lake. The ecological risk was dominated by Cd in all sediments in these study areas.关键词
重金属/生态风险评价/沉积物/长江/湖泊/安庆Key words
heavy metal/ecological risk assessment/sediment/Yangtze River/lakes/Anqing分类
资源环境引用本文复制引用
李法松,韩铖,林大松,周葆华,徐志兵,余光明,钮志远,赵亿,王淑媛..安庆沿江湖泊及长江安庆段沉积物重金属污染特征及生态风险评价[J].农业环境科学学报,2017,36(3):574-582,9.基金项目
国家自然科学基金项目(21577157) （21577157）
安徽省自然科学基金项目(1608085QD76,1708085MB40)The National Natural Science Foundation of China(21577157) （1608085QD76,1708085MB40）
The Natural Science Foundation of Anhui Province,China(1608085QD76, 1708085MB40) （1608085QD76, 1708085MB40）
