泉州市主要工业区土壤重金属健康风险评价

Health Risk Assessment of Heavy Metals in Main Industrial Park Soil of Quanzhou

为了解泉州市工业区土壤重金属的污染程度,采用现场采样及室内测试方法对泉州市主要工业区土壤中Cd、As、Pb、Zn、Cu、Hg、N i和C r等重金属的含量进行测定分析,应用健康风险评价模型对这些工业区土壤重金属通过皮肤暴露途径所引起的健康风险作出评价。结果表明,工业区土壤已受到不同程度的重金属污染,其中以Zn、Cu、Pb污染最为严重。土壤重金属的含量空间分布并不均匀。土壤重金属非致癌风险大小为:Pb>As>Cu>C r>Cd>Zn>Hg>N i,均小于致癌风险阈值1,对人体不会造成健康危害。致癌风险Cd>As,均低于致癌风险阈值,表明Cd和As不是主要的致癌风险因素。

In order for preliminary understanding of soil heavy metals pollution in industrial park,the concentrations of Cd,As,Pb,Zn,Cu,Hg,Ni and Cr in soil in industrial park of Quanzhou are analyzed and investigated to evaluate environmental quality based on health risk assessment model for safety of human.The results show that the soil in these industrial parks have been polluted by heavy metals.Especially,the pollutions of Zn,Cu,Pb are the most serious,and the spatial distribution of heavy metals in the soil is not uniform.The order of non-cancer hazard indexes of heavy metals in soil is PbAsCuCrCdZnHgNi,and the order of carcinogen risks of heavy metals is CdAs.The non-cancer hazard indexes and carcinogen risks of metals are both lower than that their threshold values.They are not to be direct threats to people health.