TCLP法评价泉州市大气降尘重金属的生态环境风险Assessment of Toxicity of Heavy Metal Contaminated Dustfall in Quanzhou City by Toxicity Characteristic Leaching Procedure
胡恭任;于瑞莲;林燕萍;戚红璐;
摘要(Abstract)：
对泉州市不同功能区大气降尘中的重金属(Cu、Zn、Pb、Cd、Cr、As、Fe、Mn、Co、Ni、V)含量进行了分析测定,采用由美国环保署(USEPA)提出并被广泛推荐采用的TCLP法对泉州市不同功能区大气降尘中的重金属元素(Cu、Zn、Pb、Cd、Cr)的生态环境风险进行评价。以TCLP法提取的泉州市大气降尘重金属Cu、Cd、Zn、Pb、Cr、As、Fe、Mn、Co、Ni和V含量分别在2.592～63.20、0.084～2.978、9.276～3141、0.147～345.0、0.628～9.696、0.019-5.152、5.037-248.9、55.00-1261、0.040-63.56、0.735-37.43和0.020-24.07 mg/kg之间。根据TCLP法测定项目的法定阈值,泉州市大气降尘不同程度地受到Cu、Zn、Pb、Cd、Cr的污染,其中以Pb、Zn污染最为严重,其次为Cu、Cd、Cr。相关性分析结果显示,Fe、Mn、Ni、Cr、V的TCLP法提取量受样品pH值的显著影响;Pb、Cd、Mn、Co、Ni、As提取量除了受金属本身的总量影响外,还受到其它元素总量和TCLP提取量的影响。主成分分析结果表明,交通尾气尘、燃油尘、装饰材料尘、地面土壤尘、工业粉尘、建筑尘和燃煤烟尘等是泉州市大气降尘的主要来源,占总贡献率的86.01%。
关键词(KeyWords)： 大气降尘;泉州市不同功能区;生态环境风险评价;TCLP法
基金项目(Foundation): 国家自然科学基金项目(批准号:21177043;40673061);; 泉州市科技计划项目(资助号:2012Z86);; 环境地球化学国家重点实验室开放基金项目(资助号:SKLEG7021)
作者(Authors): 胡恭任;于瑞莲;林燕萍;戚红璐;
DOI: 10.16461/j.cnki.1000-4734.2013.01.003
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