土壤pH值对重金属形态的影响及其相关性研究  

Effect of pH value on heavy metals form of soil and their relationship

作　　者：杨秀敏[1] 任广萌[1] 李立新[1] 罗克洁[1] 

机构地区：[1]黑龙江科技大学环境与化工学院,黑龙江哈尔滨150022

出　　处：《中国矿业》2017年第6期79-83,共5页China Mining Magazine

基　　金：黑龙江省自然科学基金项目资助(编号:D2015006)

摘　　要：为了研究土壤pH值与土壤重金属形态的相关性,通过重金属污染土壤中添加海泡石,进行了土壤重金属形态的分析及土壤pH值与土壤重金属形态的相关性研究。分析结果表明:添加海泡石可明显提高土壤pH值,降低重金属的可交换态浓度,使可交换态重金属转化为其他形态。土壤中可交换态重金属Cd、Zn、Pb浓度与土壤的pH值均呈显著负相关。除了土壤中Zn的铁锰氧化态和有机物结合态以外,Cd、Zn、Pb的碳酸盐结合态、铁锰氧化态、有机物结合态和残渣态浓度均与土壤的pH值呈显著正相关。植物体内重金属浓度与土壤pH值之间存在显著的负相关。研究表明海泡石可显著改变土壤pH值及土壤重金属的形态,并且重金属形态与土壤pH值存在显著的相关性。Through adding sepiolite in the heavy metals contaminated soil for the correlation of pH value and heavy metals of the soil, the form of heavy metals in soil was analyzed, and study on the relationship between pH value and heavy metals forms of the soil. The results showed that sepiolite could significantly improve the pH of the soil and reduce the concentration of exchangeable fraction of heavy metals, which made the exchangeable form transform into other forms. The exchangeable form of heavy metals Cd,Zn and Pb in soil and pH values were in significant negative correlation. Except the Fe-Mn oxide form and organic forms of Zn, the carbonate form, Fe-Mn oxide form, organic forms, residual forms concentration of Cd. Zn and Pb were positively correlated with the soil pH value. The concentrations of heavy metals in plant and pH in soil were significant negative correlation. The study results showed that sepiolite can significantly change the soil pH value and soil heavy metal forms and there was a significant correlation between heavy metal pollution and pH value of soil.

关 键 词：海泡石 污染土壤 重金属形态 PH值 相关性 

分 类 号：X53[环境科学与工程—环境工程]