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环境化学  2015 

重金属污染评价方法(TCLP)评价资江流域土壤重金属生态风险

Keywords: TCLP,资江流域,土壤,重金属,风险评价

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Abstract:

采用美国最新法定重金属污染评价方法TCLP法(Toxicitycharacteristicleachingprocedure)对湖南省资江流域土壤重金属生态风险进行评价.结果表明,资江流域土壤As、Cd、Cu、Zn、Ni和Pb的有效态含量分别在0.07-9.85、0.10-1.49、0.09-3.58、0.94-90.55、0.13-2.50和0.18-8.25mg·kg-1范围之间,TCLP提取的土壤As、Cu、Zn、Ni、Pb有效态量分别与其总量之间存在显著的相关关系.采用内梅罗综合污染指数进行评价,发现资江流域43个土壤样品中属安全水平、轻污染水平和中污染水平的比率分别为90.7%、7.0%和2.3%.

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