摘要
为评价工业园金属冶炼企业用地土壤重金属污染状况,本文选取As、Cd、Cu、Pb、Hg、Ni6种重金属为主要污染物,采用土壤重金属描述统计分析、单项评价法、内梅罗综合污染指数法和地累计指标法.研究结果表明,As、Cd、Cu、Pb、As、Hg 5种重金属均出现不同程度的富集,尤其Cd含量为土壤背景值的160倍,内梅罗综合污染指数(Pn)高达166,累积指数Igeo结果极强严重污染占总体的33.3％,表明研究区受人为活动影响较严重,Cd已富集,处于严格管控类.
Abstract
In order to evaluate the pollution of soil heavy metals in metal smelting enterprises of industry zone in Ningxia,As,Cd,Cu,Ph,Hg and Ni were selected as the main pollutants by descriptive statistics,single item evaluation,nemerow comprehensive pollution Index and soil accumulation.The results showed that As,Cd,Cu,Ph,As,and Hg polluted different degrees in the study area.Cd content was 160 times higher than the soil background value.Meanwhile the Pn was 166 times,and Igeo accounted for 33.3％of the overall proportion,which showed serious pollution.In summary,the study area was severely affected by human activities,and Cd has been enriched in a strictly controlled class.
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