芜湖市不同功能区土壤重金属污染状况与环境质量评价

通过对芜湖市工业区、商业区、休闲区和居住区土壤重金属污染现状的调查与分析,分别以本地区自然土壤重金属元素自然含量的平均值和国家土壤环境质量标准作为评价标准,计算出各功能区土壤单因子污染指数,并采用主成分分析法确定权重,对各功能区的土壤环境质量进行综合评价。结果表明:芜湖市各功能区土壤Cd、Hg、Cu、Pb、Cr、Zn含量均超过本地区自然土壤重金属元素自然含量的平均值。其中工业区土壤中Cd、Hg和Cu,商业区土壤中Cd和Hg,休闲区和居住区土壤中Cd均超过国家土壤环境质量标准。Cu、Hg、Pb、Cr、Cd污染均表现为工业区最大,商业区次之,Zn在各功能区含量差异不大。土壤中重金属含量上层高于下层,且在商业区和居住区差异明显。土壤环境质量居民区尚清洁,休闲区和商业区中度污染,工业区重度污染。

Heavy Metal Pollution and Assessment of Soil Environmental Quality in Different Functional Areas in Wuhu City

On the basis of the data on Cd,Hg,Cu,Pb,Cr,Zn heavy metal contents of soils sampled from the industrial zone,commercial area,recreational area and residential area in Wuhu city,Anhui province,the status of soil pollution by heavy metals was studied by use of background contents of these elements under the natural soil condition and the national quality standard of soil environment.Meanwhile,principal component analysis was applied to a comprehensive evaluation of the quality of soil environment.The study in...