EDTA、柠檬酸对Cd、Ni污染土壤植物修复的影响  

Effects of EDTA and Citric Acid on Phytoremediation of Cd and Ni Contaminated Soil

作　　者：王学锋[1] 林海[1] 冯颖俊[1] 皮运清[1] 崔倩[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,河南新乡453007

出　　处：《农业环境科学学报》2006年第6期1487-1492,共6页Journal of Agro-Environment Science

基　　金：河南省自然科学基金(0611012000);新乡市科技攻关项目(06S049)

摘　　要：通过不同浓度的EDTA和柠檬酸对土壤进行处理,强化四川黄芥修复Cd-Ni复合污染土壤的田间盆栽模拟试验,分析了四川黄芥根部和地上部中Cd、Ni的含量,探讨了EDTA和柠檬酸进入土壤后对Cd、Ni吸收和运输的影响。结果表明,采用四川黄芥对Cd-Ni复合污染土壤进行植物修复时,添加5.0mmol.kg-1的EDTA效果最佳,添加2.5mmol.kg-1的柠檬酸次之。To select the appropriate concentration of EDTA and citric acid used in repairing Cd-Ni compound contaminated soil with Brassi- cajuncea L. cv. Sichuan huangjie, a pot experiment with different application rates of EDTA and citric acid to the soils was conducted. The concentrations of Cd and Ni in root and shoot of Brassicajuncea L. cv. Sichuan huangjie were analyzed and the influence of EDTA and citric acid on absorption and transportation of Cd and Ni was also discussed. The results indicated that, when using Brassica juncea L. cv. Sichuan huangjie in the phytoremediation of Cd-Ni compound contaminated soils, the best repairing efficiency was observed in the treatment of applying 5.0 mmol· kg^-1 to the soil, the next was 2.5 mmol· kg^-1 citric acid.

关 键 词：Cd-Ni复合污染土壤 植物修复 四川黄芥 EDTA 柠檬酸 

分 类 号：X53[环境科学与工程—环境工程]