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The concentrations of As, Cd, Ni, Cr, Zn, Cu, Hg and Pb in the sediment of Xiyi River were analyzed by flame atomic absorption spectrophotometer (AAS). The results showed the average concentration of total As, Cd, Ni, Cr, Zn, Cu, Hg and Pb in the sediment was higher than the national threshold limit. The values of pollution index and integrated pollution index showed that the pollution level was Cd>;...
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