孝感市孝南区土壤重金属污染的初步研究

为调查研究孝感市孝南区的土壤重金属污染状况,在该区典型土壤中采集了11个混合土壤样本。通过原子分光光度计对各土壤样本的重金属元素Cd、Cu、Pb的含量进行了测定。依据单项污染指数法和内梅罗综合污染指数法来评价土壤重金属污染程度。结果表明以国家土壤环境质量二级标准评价,该区普遍受到了重金属Cd的污染,综合污染指数为2.23;土壤中Cd为中度污染,Cu和Pb为安全级(清洁水平),其综合污染指数为Cd>Cu>Pb。

Pollution of Several Heavy Metals in Soils of Xiaonan District of Xiaogan City

To investigate heavy metals pollution in soils of Xiaonan district of Xiaogan City,eleven soil samples were collected from representative sites in the district.The contents of the heavy metals(Cd,Cu,Pb) in soil samples were determined by atomic adsorption spectrophotometry.By adopting both the single factor index method and Nemerow multi-factor index method,the pollution indices were calculated to assess pollution extent.Based on official standard values of soil quality in China,the results indicated that the soils were contaminated compoundly and the average integrated pollution index of the district was 2.23,revealing that the soils having been slightly contaminated by Cd;inter-mediately contaminated by Cd,both Cu and Pb at safe grade,and an order of integrated contamination index of Cd>Cu>Pb.