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乙二胺四乙酸(EDTA)和乙二胺二琥珀酸(EDDS)对污染土壤中Cd、Pb的浸提效果及其风险评估

标题: 乙二胺四乙酸(EDTA)和乙二胺二琥珀酸(EDDS)对污染土壤中Cd、Pb的浸提效果及其风险评估
英文标题: LEACHING OF Cd AND Pb FROM A CONTAMINATED SOIL WITH EDTA AND EDDS:EFFECTIVENESS AND HEALTH RISK ASSESSMENT
作者: 赵娜,崔岩山,付彧,谢建治
英文作者: ZHAO Na,CUI Yanshan,FU Yu,XIE Jianzhi
出版时间: 2011-01-01
机构: 河北农业大学,河北农业大学
关键词: EDTA,EDDS,重金属,去除率,生物可给性
英文关键词: EDTA,EDDS,heavy metals,removal rate,bioaccessibility.
刊名: 环境化学
英文刊名: ENVIRONMENTAL CHEMISTRY
ISSN: 0254-6108
期号: 30
卷号: 005
基金: ^A国家高技术研究发展计划(863计划)^B2008AA06Z336^D1
页码: 958-963
分类号: X53
摘要: 为了研究EDTA和EDDS对污染土壤中Cd、Pb的去除效果和去除后土壤中Cd、Pb的风险,利用不同浓度的EDTA和EDDS(0、5、10、20、30、50 mmol·L-1)对污染土壤中Cd、Pb进行浸提,并利用 in vitro方法(人工模拟胃肠系统)对浸提后的土壤进行风险评估.结果表明,EDTA对Cd的去除率显著高于EDDS,EDTA对Cd的去除率最高为82.4%;EDDS对Cd的去除率最高为46.8%.在5-30 mmol·L-1范围内,同浓度下,EDDS对Pb去除显著高于EDTA,两种螯合剂在50 mmol·L-1时对Pb的去除无显著差异.in vitro实验表明污染土壤浸提后Cd、Pb的生物可给性显著降低.经EDDS浸提后Cd的生物可给性低于EDTA浸提后,Pb的生物可给性高于EDTA浸提后的结果.
英文摘要: Effectiveness and health risk assessment of Cd and Pb in soil was studied in a contaminated soil after remediation with EDTA and EDDS.In vitro method(artificial gastrointestinal system) was used to evaluate the health risk.The results showed that Cd and Pb removal increased significantly with increasing concentration of EDTA and EDDS.Cd removal by EDTA was significantly higher than that of EDDS.The highest Cd removal rate was 82.4%with EDTA and 46.8%with EDDS.Pb removal by EDTA was significantly higher th...