期刊论文

中文

农业环境科学学报

1672-2043

2006

25

3

722-727

10.3321/j.issn:1672-2043.2006.03.035

湖南省教育厅重点科研项目（00A003） 湖南农业大学青年基金（QN25）

本校为其他机构

采集2种重金属污染土壤，运用Tessier和Leleyter2种连续提取法分析了土壤重金属Ph、Cd、Cu和Zn的形态及其分布，研究了EDTA萃取前后土壤重金属Pb、Cd、Cu和Zn的生物可利用性。结果表明，EDTA能有效地萃取土壤中重金属，在一定浓度条件下。EDTA溶液对Pb、Cd和Cu的萃取能力比其对Zn的强。EDTA萃取前，2种污染土壤中重金属的生物可利用态含量及其百分比都较低．而其生物潜在可利用态和不可利用态的含量及其百分比都较高。萃取后，2种污染土壤重金属的生物可利用态含量和百分比都有不同程度的增加，而其生物潜在可利用态和不可利用态的含量有所减少。EDTA促进了生物潜在可利用态和不可利用态的重金属...

Two contaminated soils were collected at lead-zinc mining area located in southern Hunan Province. The bioavailabilities of Pb, Cd, Cu and Zn in the two contaminated soils before and after extracted with an EDTA were investigated with Tessier＇s five sequential extraction procedures and Leleyter＇s eight sequential extraction procedures. The results showed that EDTA solution has strong chelating abilities for heavy metals from two contaminated soils, however the extractive efficiencies of Zn was less than those of Pb, Cd, and Cu. Before extract...