黄石市青山湖底泥重金属污染评价分析

Analysis and assessment on heavy metal pollution in bottom mud of Qingshan Lake in Huangshi City

为了解黄石市青山湖底泥中重金属含量、污染程度以及各种污染物的浓度分布规律,对青山湖2,3,4号湖底泥中8种重金属元素(Cu、Pb、Cd、Zn、Cr、Ni、As、Hg)进行了实地采样和分析研究。参照国家土壤环境质量标准,利用单项污染指数评价法和内梅罗综合污染指数法对底泥中的重金属污染程度进行了评价,并分别对表层和深层底泥中的重金属污染物浓度分布规律进行了分析比较。结果表明,青山湖底泥中主要的重金属污染物是Cd和As,其次是Cu、Zn、Hg、Ni、Cr、Pb,且深层底泥受重金属污染程度明显小于表层底泥。

In order to make clear the heavy metal content, pollution degree and concentration distribution in the bottom mud of Qingshan Lake in Huangshi City, field sampling and analysis for 8 heavy metals（ Cu, Pb, Cd, Zn, Cr, Ni, As, Hg） were con-ducted in No. 2, 3, 4 sub-lakes of Qingshan Lake. By referring to the national soil environmental standards, the pollution of heavy metals in the mud are assessed by single pollution index method and Nemero index method, and the distribution law of heavy metals in surface layer and deep layer are analyzed and compared. The analysis results show that the main heavy metals in the mud of Qingshan Lake are Cd and As, and the followings are Cu, Zn, Hg, Ni, Cr, Pb, and the heavy metal pollution in sur-face mud is more serious than that in the deep layer.