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The speciation and concentration of heavy metal Cu and Zn were examined by Tessier sequential extraction methods in sediments of Tai Lake,Nansi Lake and Baiyangdian Lake. And the characteristics of overlying water were determined. The results showed three lakes all belong to eutrophic lakes, while Baiyangdian's eutrophication is most serious, the concentration of TP is 0.48mg/L; in sediments Cu existed mainly in the form of residual and organicbound fraction, these two forms accounted for moredoi:10.1016/j.proeng.2011.11.050 fatcat:l6ecmxcmlve6lbjxfkebdkigxq