三明市铅锌矿污染土壤的重金属含量及其形态分布研究  

Study on the Content and Distribution of Heavy Metals in Polluted Soil from Sanming

作　　者：张丽华[1] 郑承松[2] 张君诚[1] 邹志明[1] 

机构地区：[1]三明学院化学与生物工程系,福建三明365004 [2]三明市环保局,福建三明365000

出　　处：《三明学院学报》2008年第2期184-187,共4页Journal of Sanming University

基　　金：福建省教育厅科技项目(JA06046);福建省自然科学基金项目(E0610025)

摘　　要：以三明市实际受重金属污染的土壤为研究对象,研究了污染土壤中重金属的种类、含量以及重金属的形态分布情况。重金属全量微波消解结果表明,污染土壤含有Zn、Pb、Cu、Cr、Ni等5种重金属,含量由高到低的顺序为Zn>Pb>Cu>Cr>Ni,其含量分别为4564、1587、737、46、12 mg/kg,其中Zn、Pb和Cu均超过土壤环境质量三级标准限值。形态分析结果表明,污染土壤中的重金属Zn以水溶态和可氧化态为主,Pb主要以可还原态为主,Cu以可氧化态为主,Cr和Ni主要以残渣态为主。Zn和Ni的不稳定态含量较高,具有潜在的环境影响能力,在土壤利用时应给予关注。For the polluted soil from Sanming, the species, content and distribution of heavy metals in tested soil were studied. The microwave digestion result showed that the soil contained Zn, Pb, Cu, Cr and Ni. The degree of content of heavy metals was Zn〉Pb〉Cu〉Cr〉Ni. The concentration for Zn, Pb, Cu, Cr and Ni was 4564,1587,737,46and 12 mg/kg respectively. It was found that the concentration for Zn, Pb or Cu exceeded the third grade limit of soil environmental standard respectively. The sequential extraction showed that Zn in tested soil was mainly associated with water soluble and oxidizable fractions, Pb was mainly in reducible fraction, Cu was mainly in oxidizable fraction, Cr and Ni were mainly in reducible fraction. Zn and Ni existed in more active forms, which may result in potential bad impact on soil environment, so more attention should be paid.

关 键 词：污染土壤 重金属 化学形态 BCR连续提取 

分 类 号：X131.3[环境科学与工程—环境科学]