摘要
选取贵州丹寨汞矿区土壤、炉渣灰、西山矿渣和尾矿废渣4个样品,用Tessier连续萃取法分析Pb、Zn、Cu、Mn元素的含量和存在形态。结果表明,丹寨汞矿区土壤中的Pb、Zn、Cu、Mn元素均超出了土壤背景值,周边尾矿渣的堆放对土壤有一定的污染;特别是土壤和渣中Pb以可交换态存在的质量分数较高,平均为44.7%;Zn、Mn主要以铁锰氧化结合态、有机态和残渣态存在,尽管这部分重金属相对稳定,但在适当的地球化学条件下,这些重金属会重新释放出来,对周边生态环境构成威胁。
Concentration and chemical form analysis of heavy metals（Pb,Zn,Cu,and Mn） were carried out by Tessier sequence extraction in soil,slag ash,Xishan slag and tailings residue samples in Danzhai mercury mining areas in Guizhou.Results showed that the heavy metals elements in soil exceeded the soil background content which was polluted by the surrounding slag dumps,especially Pb was sensitive to the environmental variation with the mass fraction of an average of 44.7%.Zn and Mn mainly in forms of Fe-Mn oxide bound,organic and residual presence.They could be released and polluted the surrounding environment under particular geographical environment despite they were relatively stable in these forms.
出处
《贵州农业科学》
CAS
北大核心
2010年第2期202-204,207,共4页
Guizhou Agricultural Sciences
基金
973国家重点基础研究发展计划项目"喀斯特矿山环境演变与生态安全评价及预警方法研究"(2008CB417209)
国家自然科学基金项目"高氟高砷煤矿区水环境复合污染生态毒性效应及其机理研究"(20977020)
贵州省自然科学基金项目"煤矿酸性废水的化学特征及其生物毒性效应的监测与评价"(QJ20072015)
贵州省社会发展攻关项目"贵阳市"两湖一库"底质污染治理技术研究"[黔科合SY字(2008)3034]
关键词
汞矿
土壤
废渣
重金属
形态分析
贵州
mercury mine areas
soil
residues
heavy metal
chemical form analysis
Guizhou
