江苏省中部城镇河流底泥重金属污染评价及来源分析

为研究河流底泥中重金属的来源以及对环境的危害程度，以江苏省中部某城镇河流底泥为主要研究对象，运用潜在生态风险指数法对重金属污染进行评价，并采用Pearson相关分析、R型聚类分析法对重金属污染来源进行分析。结果表明：Hg、Cd、As、Cu、Ni、Pb、Cr和Zn含量平均值分别为0.41、0.36、12.04、43.26、48.77、35.95、108.11、140.30 mg/kg；重金属Cd、Hg的危害最强且污染较重，Cd污染主要与冶炼、化石燃料燃烧、涂料颜料业有关，Hg污染主要与化石燃料燃烧有关，Cr污染主要与合金制品制造有关，Cu和Ni污染与电镀加工过程有关，As和Zn污染主要与化工制造业有关。

Assessment and source analysis of heavy metal pollution in river sediment of a town in central Jiangsu Province

In order to understand the source of heavy metals in river sediment and their impacts on the local environment, we adopted potential ecological risk index method to evaluate the heavy metal pollution of a town in central Jiangsu Province, then Pearson correlation analysis and R-type cluster analysis to analyze the source of the pollution. Results showed that the average contents of Hg, Cd, As, Cu, Ni, Pb, Cr and Zn were 0.41mg/kg, 0.36 mg/kg, 12.04 mg/kg, 43.26 mg/kg, 48.77 mg/kg, 35.95 mg/kg, 108.11 mg/kg and 140.30 mg/kg, respectively. Among them, Hg and Cd were the most harmful and heavily spread pollutants, Cd pollution was mainly related to smelting, fossil fuel combustion and coating industry, Hg was induced by the fossil fuel combustion, Cr mostly came from the manufacture of alloy products, Cu and Ni were associated with electroplating process, and As and Zn were mainly related to the chemical manufacturing.