EDDS对海州香薷修复重金属复合污染土壤的田间效应  

Effect of EDDS on Elsholtzia Splendens Remediation Efficiency on Multiply Heavy Metal Contaminated Soil——A Filed Trial

作　　者：孙小峰[1] 吴龙华[1] 骆永明[1] 

机构地区：[1]中国科学院南京土壤研究所土壤与环境生物修复研究中心

出　　处：《土壤》2006年第5期609-613,共5页Soils

基　　金：国家重点基础研究发展规划项目(2002CB410809);中国科学院知识创新项目(KZCX3-SW-429;CXTD-Z2005-4);国家自然科学基金项目(20477048;40432005)共同资助。

摘　　要：两年田间小区试验研究了加入易降解络合剂EDDS后污染土壤及修复植物海州香薷地上部Cu、Zn、Pb含量及地下水水质变化。结果显示,添加EDDS能在一定程度上提高海州香薷对Cu、Zn、Pb的吸收量,但是对地下水水质影响不大,符合国家III类地下水水质标准。EDDS强化海州香薷修复复合污染土壤有一定的应用前景,且对于地下水的潜在淋滤风险较小,但是在应用期间应注意对环境因素特别是降水及地下水的影响。Field experiment was conducted to study the enhancement of ethylene diamine disuccinic acid （EDDS） on soil NHnNO3 extractable Cu, Zn and Pb concentrations, and Elsholtzia splendens plant Cu, Zn and Pb uptake in a period of two years. Results showed that EDDS addition could improve plant Cu, Zn and Pb uptake by Elsholtzia splendens, but didn＇t significantly affect the ground water quality. However, the potential environmental risk of EDDS application on heavy metal leaching to ground water may need further monitoring. And the efficiency of chelator-enchanced phytoextraction requires further examination in relation to environmental factors especially rainfall and ground water quality.

关 键 词：海州香薷 EDDS 植物修复 环境风险 

分 类 号：X820.6[环境科学与工程—环境工程]