新型功能膜材料对污染土壤铅汞镉钝化作用研究

Inactivation of Pb,Hg and Cd in-Situ in Contaminated Soil by a Functional ized Monolayer Material

采用盆栽实验,研究了在未加钝化剂和添加钝化剂的条件下,Pb、Hg和Cd单因子污染及Pb-Cd和Pb-Hg-Cd复合污染对油菜生长性状的影响和重金属在土壤-油菜系统中迁移、积累的特性。结果表明,重金属Pb、Hg在油菜体内不同部位的分配规律为根>茎、叶,而Cd在油菜体内不同部位的分配规律为茎、叶>根。重金属在土壤-油菜系统中的迁移能力为Cd>Pb>Hg。钝化剂对Pb、Hg和Cd具有良好的吸附钝化作用,可有效地抑制Pb、Hg和Cd在油菜体内的积累。

Effects of single and combined pollutants Pb,Hg,Cd,Pb,Cd and Pb -Hg -Cd on cole growth and their migration an d accumulation in soil -plant system u nder modifying measures were studie d with a pot experiment.The results s howed that the ad-sorption of Pb and Hg by cole is in order of root>stemand leaf,but the adsorption of Cd by cole was in order of stem and leaf >root.The migration of Pb,Hg and Cd in soil -plant systemdecreased in order of Cd>Pb>Hg.It maybe concluded that the a pplication of the modifier could effectively restrain the migration and accumulation of heavy metals,especially,Pb and Hg towards the vegetable.