城市道路土壤重金属污染及潜在生态危害评价

文章采用了单因子及内梅罗综合污染指数法,对泰安市城市道路两侧土壤重金属污染现状进行了调查评价,并采用Hakanson提出的潜在生态危害指数法对土壤中重金属的潜在生态危害进行了评价。结果表明,城市道路两侧土壤重金属Pb、Cd、Cu、Zn、Cr、As单项污染指数分别为0.11、6.8、1.15、0.86、0.41、0.29,污染程度依次为Cd>Cu>Zn>Cr>As>Pb;各道路综合污染程度依次为东岳大街>岱宗大街>泰山大街>龙潭路>温泉路。城市道路土壤重金属污染呈现Cd污染严重的明显特征,潜在生态危害单项系数达到204,重度污染程度,其余重金属Pb、Cu、Zn、Cr、As轻微污染;潜在生态风险指数214.88,达到中度生态危害程度。

Heavy Metal Pollution and the Ecological Hazard in Urban Soils of Side Roads in Tai'an

Taking Tai'an as an example,the actuality of heavy metal pollution in the target soil was studied,using the single factor and N.L.Nemerow composite index method.The potential ecological hazard suggested by Hakanson was used to assess ecological hazards of heavy metals in urban soils.Results showed that the single pollution indexes of urban soils were 0.11,6.8,1.15,0.86,0.41 and 0.29 for Pb,Cd,Cu,Zn,Cr and As respectively.The target soil was highly polluted by Cd,the potential ecological hazard single index of Cd was 204,and slightly polluted by Pb,Cu,Zn,Cr and As;Potential ecological risk index is up to 241.88,at the medium ecological hazard degree.