雅安市耕地土壤重金属健康风险评价

通过采样分析探究了雅安市耕地土壤重金属的分布,并利用国家土壤环境质量一级标准和健康风险评价模型对雅安市耕地土壤中Pb、Zn、Cu、Cd的含量进行健康风险评价。结果表明,雅安耕地土壤Pb、Zn、Cu、Cd的含量范围分别为:38.25~127 mg.kg-1Pb、32.91~156.4 mg.kg-1Zn、7.479~82.73 mg.kg-1Cu、1.667~7.949 mg.kg-1Cd,其中Cd超标最为严重,Pb和Zn次之,Cu最小。土壤中重金属Pb、Zn、Cu、Cd的含量所引起的成人与儿童平均个人风险均表现为Cd>Pb>Cu>Zn,其中宝兴县五龙乡东风村人体总的健康危害风险最大,在实际生产生活中应加强相应预防和控制。

Health Risk Assessment of Heavy Metals in Arable Soils of Ya′an

This thesis explored the distribution of heavy metals(Pb, Zn, Cu, Cd)in cultivated land of Ya′an. Contents of heavy metals (Pb, Zn, Cu, Cd) in cultivated land in Ya′an, were investigated to evaluate environmental quality based on the national soil environmental quality standards and health risk assessment model for safety of soils human. The results showed that Pb, Zn, Cu, Cd contents of cultivated soils in the range of: Pb 38.25～127 mg·kg~(-1), Zn 32.91～156.4 mg·kg~(-1), Cu 7.479～82.73 mg·kg~(-1), Cd 1.667～7.949 mg·kg~(-1), which exceeded the most serious Cd, followed by Pb, Zn, and the minimum is Cu.The average order of individual risk index for children and adult health was Cd>Pb>Cu>Zn. For human general hazard indexes, the Dongfeng village of wulong town in Baoxing was the highest. It may produce a threat to human health. Besides, Contents of heavy metals Cd in cultivated land soil in Ya′an was the beyond standard equally; Pb, Zn, Cu of parts of cultivated land in Ya′an existed potential risk. And we should strengthen prevention and control of the corresponding in the actually production and living life.