文档介绍：2009 年 10 月第三届全国农业环境科学学术研讨会论文集 379
EDTA 辅助小藜修复 Pb 及 Pb-Cd 复合污染
土壤的研究56
王学锋,姚远鹰
(河南省环境污染控制重点实验室, 河南师范大学化学与环境科学学院, 河南新乡 453007)
摘要:通过盆栽试验,研究了 Pb 及 Pb-Cd 复合污染土壤添加 EDTA(乙二胺四乙酸)对小藜生长和转运、富集 Pb、
Cd 的影响。结果表明,高浓度的 EDTA 对小藜的生长有抑制作用,Pb 及 Pb-Cd 复合处理下 EDTA 最佳添加浓度均为
mmol·kg-1,此时小藜对 Pb 的转运系数达 和 ,富集系数达 和 ,分别比对照提高 554%,493%,
8 431%和 2 367%;对 Cd 的转运系数达 和 ,富集系数达 和 ,分别比对照提高 165%,355%,77%
和 283%。 mmol·kg-1EDTA 辅助小藜修复 Pb-Cd 复合污染土壤的效果优于修复 Pb 污染土壤的效果。
关键词:乙二胺四乙酸;小藜;Pb-Cd 复合污染;转运系数;富集系数
EDTA Assisted Phytoremediation of Chenopodium serotinum L. for Pb and Pb-Cd Contaminated Soil
WANG Xue-feng, YAO Yuan-ying
(Henan Key Laboratory for Environmental Pollution Control, College of Chemistry and Environmental Science, Henan Normal
University, Xinxiang 453007, China )
Abstract: An outdoor pot experiment was conducted to study the effect of EDTA on the phytoremediation of Pb and Cd by
Chenopodium serotinum L. The results revealed that 10 mmol·kg-1 EDTA was harmed for Chenopodium serotinum L.
mmol·kg-1 was the best EDTA concentration for phytoremediation. In Pb and Pb-Cd contaminated soil, TF of Pb were markedly
enhanced to and , BCF were markedly enhanced to and , which were respectively augmented 554%, 493%,
8 431% and 2 367% by mmol·kg-1 EDTA parison with the blank tests; TF of Cd were markedly enhanced t