贵阳市乌当区耕地土壤重金属污染现状及其评价

Pollution of Soil Heavy Metal and Its Evaluation of Farmland in Wudang District of Guiyang

在对乌当区 10乡镇耕地土壤进行全面调查的基础上 ,对土壤重金属污染现状进行了监测与初步评价 ,结果表明 :该区域 10乡镇耕地土壤 5种重金属元素 ( Cd、Pb、Cr、Hg、As)的含量变幅较大 ;全区耕地土壤重金属污染综合评价处于警戒水平 ,多因子综合污染指数为 0 .78,其中 ,金华、朱昌两镇的耕地土壤已受到了重金属轻度污染 ,多因子综合污染指数分别为 1.13、1.2 2 ,羊昌、新堡、下坝、东风、水田等 5乡镇的耕地土壤处于警戒状态 ,新场、百宜、偏坡等 3乡镇的土壤处于安全状态 ;Cd。

Pollution of soil heavy metal and its evaluation of farmland in Wudang area of Guiyang were studied.The results showed that the contents of Cd,Pb,Cr,Hg and As of heavy metals in the soils vary markedly,which the index of comprehensive pollution in the areas was 0.78 so to reach warning level and that Cd,Cr were main the pollution factors of soil heavy meatals in the areas.