吉林省辉发河底泥重金属污染评价

Evaluation on Heavy Metal Contamination of Sediments in Huifa River of Jilin Province

辉发河为第二松花江的第一大支流,其污染情况对第二松花江和松花湖的环境影响较大。本文以辉发河底泥为研究对象,测定了底泥中砷、镉、铬、铜、汞、铅和锌等重金属元素含量,探讨了重金属元素分布特点,并采用沉积物基准法和地质累积指数法对重金属污染情况进行了评价。结果表明,辉发河底泥砷、镉、铬、铜、汞、铅和锌平均含量分别为5.9、0.162、71.1、17.6、0.037、21.5 mg/kg和53.3 mg/kg,含量水平比较低,各重金属元素在辉发河干流底泥中含量变化规律基本一致;综合两种污染评价方法结果可知,辉发河底泥中重金属总体污染水平较低,污染元素主要为Cr、Pb、Hg和As。

As the largest tributary of the Second Songhua River, the pollution of Huifa River will affect the environment of Songhua Lake and Second Songhua River. The concentrations of heavy metals （As, Cd, Cr, Cu, Hg, Pb and Zn） in sediment samples from Huifa River were analyzed and the distribution of heavy metal was discussed. The contamination characteristics of heavy metals were evaluated by sediment quality guidelines and geoaccumulation index. The results showed that the average content of heavy metals （As, Cd, Cr, Cu, Hg, Pb and Zn） in sediments was low, with 5.9, 0. 162, 71.1, 17.6, 0. 037, 21.5 mg/kg and 53.3 mg/kg, respectively, and the concentration variation of heavy metals along the main stream was the same. By comprehensive analysis on the results from two kinds of pollution evaluation methods, the overall pollution levels of heavy metals of sediment in Huifa River were relatively low, and pollution elements are mainly Cr, Pb, Hg and As.