Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals
Hu, Pengjie1; Yang, Bingfan1; Dong, Changxun2; Chen, Like1; Cao, Xueying1,3; Zhao, Jie1,2; Wu, Longhua1; Luo, Yongming4; Christie, Peter1; Wu, LH (reprint author), Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China. lhwu@issas.ac.cn
发表期刊CHEMOSPHERE
ISSN0045-6535
2014-12-01
卷号117页码:532-537
关键词Agricultural Soil Amendment Column Leaching Ecological Risk Edta Field Leaching
DOI10.1016/j.chemosphere.2014.08.081
产权排序[Hu, Pengjie; Yang, Bingfan; Chen, Like; Cao, Xueying; Zhao, Jie; Wu, Longhua; Christie, Peter] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; [Dong, Changxun; Zhao, Jie] Nanjing Agr Univ, Nanjing 210095, Jiangsu, Peoples R China; [Cao, Xueying] Hunan Normal Univ, Changsha 410006, Hunan, Peoples R China; [Luo, Yongming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
作者部门中科院海岸带环境过程与生态修复重点实验室
英文摘要The efficiency of heavy metal removal from soil by EDTA leaching was assessed in a column leaching experiment at the laboratory scale and field heap leaching at the pilot scale using a sandy loam sierozem agricultural soil contaminated with Cd, Cu, Pb, and Zn. Soil amendment and aging were conducted to recover leaching soils. The percentages of Cd, Cu, Pb, and Zn removed by column leaching were 90%, 88%, 90%, and 67%, respectively, when 3.9 bed volumes of 50 mM EDTA were used. At the pilot scale, on-site metal removal efficiencies using the selected leaching procedure were 80%, 69%, 73% and 62% for Cd, Cu, Pb and Zn, respectively. EDTA leaching decreased soil CEC, total P, total K and available K concentrations but increased organic matter and total Kjeldahl N concentrations. The subsequent amendment and soil aging further reduced the DTPA-extractable heavy metals in the leached soils. Growth of the first crop of pak choi in the leached soil was inhibited but the second crop grew well after the soil was aged for one year and the concentrations of Cd and Pb in the edible parts were below the Chinese statutory limits. The results demonstrate the potential feasibility of the field leaching technique using EDTA combined with subsequent amendment and soil aging for the remediation of heavy metal-contaminated agricultural soils. (C) 2014 Elsevier Ltd. All rights reserved.; The efficiency of heavy metal removal from soil by EDTA leaching was assessed in a column leaching experiment at the laboratory scale and field heap leaching at the pilot scale using a sandy loam sierozem agricultural soil contaminated with Cd, Cu, Pb, and Zn. Soil amendment and aging were conducted to recover leaching soils. The percentages of Cd, Cu, Pb, and Zn removed by column leaching were 90%, 88%, 90%, and 67%, respectively, when 3.9 bed volumes of 50 mM EDTA were used. At the pilot scale, on-site metal removal efficiencies using the selected leaching procedure were 80%, 69%, 73% and 62% for Cd, Cu, Pb and Zn, respectively. EDTA leaching decreased soil CEC, total P, total K and available K concentrations but increased organic matter and total Kjeldahl N concentrations. The subsequent amendment and soil aging further reduced the DTPA-extractable heavy metals in the leached soils. Growth of the first crop of pak choi in the leached soil was inhibited but the second crop grew well after the soil was aged for one year and the concentrations of Cd and Pb in the edible parts were below the Chinese statutory limits. The results demonstrate the potential feasibility of the field leaching technique using EDTA combined with subsequent amendment and soil aging for the remediation of heavy metal-contaminated agricultural soils. (C) 2014 Elsevier Ltd. All rights reserved.
文章类型Article
资助机构Environmental Sciences & Ecology
收录类别SCI
语种英语
关键词[WOS]ELECTROCHEMICAL TREATMENT ; WASHING SOLUTION ; GARDEN SOIL ; EXTRACTION ; IMMOBILIZATION ; REMEDIATION ; RECOVERY ; COPPER ; ZN ; DISSOLUTION
研究领域[WOS]Environmental Sciences & Ecology
WOS记录号WOS:000347263300075
引用统计
被引频次:68[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/8684
专题中国科学院海岸带环境过程与生态修复重点实验室
通讯作者Wu, LH (reprint author), Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China. lhwu@issas.ac.cn
作者单位1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Nanjing 210095, Jiangsu, Peoples R China
3.Hunan Normal Univ, Changsha 410006, Hunan, Peoples R China
4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
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GB/T 7714
Hu, Pengjie,Yang, Bingfan,Dong, Changxun,et al. Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals[J]. CHEMOSPHERE,2014,117:532-537.
APA Hu, Pengjie.,Yang, Bingfan.,Dong, Changxun.,Chen, Like.,Cao, Xueying.,...&Wu, LH .(2014).Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals.CHEMOSPHERE,117,532-537.
MLA Hu, Pengjie,et al."Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals".CHEMOSPHERE 117(2014):532-537.
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