聚天冬氨酸强化植物修复重金属污染土壤的研究  

The Research of Enhancing Phytoremediation of Heavy Metals Contaminated Soil with PASP

作　　者：张鑫[1] 史璐皎 刘晓云[1] 张涵[1] 李玲慧[1] 谭天伟[1] 曹辉[1] 

机构地区：[1]北京化工大学,北京100029

出　　处：《中国农学通报》2013年第29期151-156,共6页Chinese Agricultural Science Bulletin

基　　金：北京化工大学科技创新基金项目"聚天冬氨酸强化植物修复重金属污染土壤的研究"(pt2012181)

摘　　要：为了探究PASP作为螯合剂在植物修复过程中的强化作用,采用土柱淋滤实验,研究不同浓度的聚天冬氨酸(PASP)对重金属铅(Pb)、镉(Cd)的活化能力(加入淋出量和空白对比)。结果表明,在一定浓度范围内,PASP对Pb和Cd的活化能力随PASP浓度的增加而增加。在盆栽模拟实验中发现,PASP对玉米修复重金属污染土壤有明显的强化作用。施用11 g/L PASP的玉米株高为114.4 cm,大于施加EDTA的植株(110.9 cm)。确定了PASP的最佳施用浓度为3 g/L和7 g/L,吸收重金属量分别为Pb114.829μg和84.662μg、Cd 54.447μg和66.915μg,与EDTA相比对Cd的吸收量提高约10倍,对Pb的吸收量提高约3倍。进一步用水合肼和乙醇胺对PASP进行衍生化,淋洗实验证明用乙醇胺改性的PASP对重金属的活化效果得以提高,为修复被重金属污染的土壤提供了一种较好的络合剂。In order to explore the enhancing abilities of PASP during phytoremediation,laboratory simulations of soil columns were designed to research the activated ability of different concentration of polyaspartic acid（PASP） on heavy metal lead（Pb） and cadmium（Cd）（joining leaching quantity and blank contrast）.The experiments showed that,in the concentration range,PASP’s activated ability on heavy metals increased with the increasing of PASP’s concentration.With the pot experiments,it was seen that PASP could significantly enhance the effect on corn remediation of heavy metals contaminated soil.The heights of corn that applied 11 g/L PASP was 114.4 cm,which was better than the corn that applied EDTA（110.9 cm）.It was proved that the best concentration of PASP application was 3 g/L and 7 g/L,and the absorption in heavy metals was 114.829 μg and 84.662 μg for Pb,and 54.447 μg and 66.915 μg for Cd.Compared with EDTA,the absorption amount of Cd increased about 10 times as well as 3 times of Pb.Further researches were designed to derive PASP with hydrazine hydrate and ethanolamine.Leaching experiments showed that the activation effect of heavy metals could be improved with ethanolamine modified PASP,which provided a better complexing agent for the repair of soil that contaminated by heavy metals Cd and Pb.

关 键 词：聚天冬氨酸 植物修复 重金属污染土壤 铅 镉 

分 类 号：S19[农业科学—农业基础科学]