海泡石与菌根对污染土壤中Pb、Cd、Zn形态的影响  

Effect of sepiolite and mycorrhizal on form of Pb、Cd and Zn in heavy metal contaminated soil

作　　者：杨秀敏[1] 潘宇[1] 钟子楠[1] 罗克杰[1] 

机构地区：[1]黑龙江科技学院资源与环境工程学院,哈尔滨150027

出　　处：《黑龙江科技学院学报》2012年第5期497-500,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：黑龙江省教育厅科学技术研究项目(11511350)

摘　　要：为修复重金属复合污染的土壤,采用连续提取法,通过盆栽实验研究了海泡石与菌根对土壤重金属Pb、Cd、Zn形态的影响。结果表明:海泡石可使Pb、Cd的可交换态转化成其他4种形态,使Zn的可交换态转化成碳酸盐结合态、有机物结合态和残渣态;菌根能显著增加可交换态的Pb、Cd、Zn浓度,降低了Pb的碳酸盐结合态、Cd的铁锰氧化态、Zn的有机物结合态的浓度。海泡石和菌根联合处理同单施海泡石的结果相似,说明联合修复中对重金属形态的影响海泡石起主导作用。该研究证实了海泡石可以调节重金属Pb、Cd、Zn的形态,从而降低污染土壤中重金属的生物有效性。This paper is an attempt to study the effect of sepiolite and mycorrhizal on soils form using sequential extraction procedure for the remediation of compound heavy metal contaminated soil. The re- suits show that adding sepiolite can trigger the transformation of Pb and Cd from their exchangeable forms to another four forms, thus accelerating the transformation of Zn from exchangeable forms to carbonate forms, organic forms and residual forms. Moreover, adding mycorrhizal can produce a significant increase in the concentration of Pb, Cd and Zn in their exchangeable forms and decrease in the carbonate forms concentrations of Pb, Fe/Mn-oxidation forms concentrations of Cd, organic forms concentrations of Zn. The combination of sepiolite and mycorrhizal gives a similar effect to only using the treatment of sepiolite, explaining that sepiolite plays the dominant role in affecting the form of heavy metal in the combined treatment. Research confirms that sepiolite can regulate the heavy metal forms and reduce the biological effectiveness of heavy metal in contaminated soil.

关 键 词：海泡石 菌根 土壤 重金属形态 

分 类 号：X53[环境科学与工程—环境工程]