赤水河中重金属含量及污染评价

Heavy Metal Content and Pollution Evaluation in Chishui River

为了了解贵州地区赤水河水体污染状况,对赤水河17个样点中重金属的含量进行了采样检查和分析。结果发现,赤水河河水中的Cd、Cr、Cu、Pb、Hg和As 6种重金属的含量范围分别为0.000 17～0.000 88 mg/L、0.001 29～0.009 00 mg/L、0.002 05～0.008 29 mg/L、0.001 45～0.007 41 mg/L、0～0.001μg/g和0～0.008μg/g。将河水测定结果与《地表水环境质量标准》(GB 3838-2002)比较,根据单因子指数法,河水中6种重金属单因子污染指数均<1.0,总体为清洁水平。但上游的综合污染指数为0.409,属于微污染,下游及整条河的综合污染指数分别为0.553、0.602,综合属于轻度污染。总体而言,赤水河中重金属的污染需要引起有关部门的重视。

In order to understand water pollution situation in Chishui River,Guizhou Province,the heavy metal content in 17 sampling sites were tested and analyzed.It was found that the contents of Cd,Cr,Pb,Cu,Hg and As in Chishui River were 0.000 17-0.000 88 mg/L,0.001 29-0.009 00 mg/L,0.002 05-0.008 29 mg/L,0.001 45-0.007 41 mg/L,0-0.001 μg/g and 0-0.008 μg/g.Compared with GB 3838-2002,according to the single factor index method,six single pollution index of heavy metal was less than 1.0.The comprehensive pollution index of upstream is 0.409,belonging to micro-pollution,the comprehensive pollution index of lower reaches and whole river are 0.553,0.602 respectively,belonging to light pollution.On the whole,heavy metal pollution in Chishui River needs to cause the attention of the relevant departments.