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| Pollution characteristics and ecological risk assessment of heavy metals in the sediments from lakes of Anqing City and Anqing section of Yangtze River |
| Received:October 17, 2016 |
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| KeyWord:heavy metal;ecological risk assessment;sediment;Yangtze River;lakes;Anqing |
| Author Name | Affiliation | E-mail | | LI Fa-shong | College of Environmental Resources, Anqing Normal University, Anqing 246011, China
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | HAN Cheng | College of Environmental Resources, Anqing Normal University, Anqing 246011, China | | | LIN Da-song | Innovative team of monitoring and precaution for cropland environment, Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, China | | | ZHOU Bao-hua | College of Environmental Resources, Anqing Normal University, Anqing 246011, China | zhoubh@aqnu.edu.cn | | XU Zhi-bing | College of Environmental Resources, Anqing Normal University, Anqing 246011, China | | | YU Guang-ming | College of Environmental Resources, Anqing Normal University, Anqing 246011, China | | | NIU Zhi-yuan | College of Environmental Resources, Anqing Normal University, Anqing 246011, China | | | ZHAO Yi | College of Environmental Resources, Anqing Normal University, Anqing 246011, China | | | WANG Shu-yuan | College of Environmental Resources, Anqing Normal University, Anqing 246011, China | |
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| 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 surface sediment samples from lakes of Anqing City and Anqing section of Yangtze River, and the ecological risk assessment was evaluated using 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 ecological 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, Shimen Lake and Baidang Lake. The ecological risk was dominated by Cd in all sediments in these study areas. |
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