Historical Characteristics of Contamination and Risk of Heavy Metals in Weishan Lake,China |
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| Authors: | Lihua Sun Wei Guo Shujuan Wang Lekuan Ma |
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| Affiliation: | 1.Key Laboratory of Urban Stromwater System & Water Environment,Beijing University of Civil Engineering and Architecture,Beijing,China;2.School of Environmental Science and Engineering,North China Electric Power University,Beijing,China;3.Chinese Academy for Envirormental Planning,Beijing,China |
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| Abstract: | Combined with the dating analysis of 210Pb and 137Cs, the historical concentration and risk of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn in the core sediment of Weishan Lake were determined. Pollution concentrations, enrichment factor, geo-accumulation index, and ecological risk index of these metals and C/N ratio indicate that the natural inputs prevailed till early 1900s. From late 1970s onwards, the risk posed by these metals was significantly increased. Cu and Hg might cause adverse biological effects. The increase of soil erosion and wastewater discharge in the watershed promoted input and accumulation of these metals in the lake. The coal and petroleum industry in the catchment led the more accumulation of Hg, Cd and Cu in the lake. |
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