农业环境科学学报Issue(7)：1293-1300,8.DOI:10.11654/jaes.2015.07.010
EDDS与EDTA强化苎麻修复镉铅污染土壤
EDTA and EDDS Enhanced Remediation of Cd and Pb Contaminated Soil by Ramie(Boehmeria Nivea)
摘要
Abstract
Ramie(Boehmeria nivea)has showed potential to remediate heavy metal contaminated soils. However, low availability of heavy metals in soils limits the remediation efficiencies. Here a pot experiment was conducted to assess the effects of two chelating agents, ethylene diamine disuccinate(EDDS)and ethylene diamine tetraacetate(EDTA), on the uptake of Cd and Pb by ramie in Cd and Pb contaminated yellow-cinnamon soil. Biomass and malondialdehyde(MDA)content of ramie and concentrations of Cd and Pb in both different parts of ramie and soil were measured. The total content of Cd and Pb in leaf, shoot and root of ramie grown in EDTA and EDDS treated soils in-creased significantly, suggesting the activation of heavy metals in the soils. At 1.5 mmol·kg-1 to 3 mmol·kg-1 of chelating agents, EDDS per-formed better in Cd accumulation than EDTA did, with Cd removal being 16%to 27%greater than the control(no chelating agent). At high-er than 3 mmol·kg-1 of chelating agents, however, ramie with EDTA treatment had higher Cd concentration than that with EDDS. For Pb contaminated soil, EDTA activated Pb better than EDDS did, and the removal efficiency of Pb by ramie increased by up to 22.6%. Applica-tions of both EDTA and EDDS reduced ramie biomass but improved the content of MDA in leaves. However, EDDS showed less adverse ef-fects on ramie than EDTA did at the same concentrations.关键词
EDDS/EDTA/苎麻/污染土壤/强化修复Key words
EDDS/EDTA/ramie/contaminated soil/enhanced remediation分类
资源环境引用本文复制引用
刘金,殷宪强,孙慧敏,吕家珑,韦革宏..EDDS与EDTA强化苎麻修复镉铅污染土壤[J].农业环境科学学报,2015,(7):1293-1300,8.基金项目
国家高技术研究发展计划（863计划）（2012AA101402）；国家自然科学基金（21207106；21207107）；陕西省自然科学基础研究计划项目（2012JQ5012；2014JQ5184）；中央高校基本科研业务专项项目 （）
