Humic substances as a washing agent for Cd-contaminated soils
文献类型：期刊论文
| 作者 | Meng, Fande1,2; Yuan, Guodong1 ; Wei, Jing1; Bi, Dongxue1,2; Ok, Yong Sik3,4; Wang, Hailong5,6,7; Yuan GD(袁国栋)
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| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 181页码:461-467 |
| 关键词 | Cadmium Calcium hydroxide Leonardite Soil remediation Soil washing |
| ISSN号 | 0045-6535 |
| 通讯作者 | 袁国栋 |
| 英文摘要 | Cost-effective and eco-friendly washing agents are in demand for Cd contaminated soils. Here, we used leonardite-derived humic substances to wash different types of Cd-contaminated soils, namely, a silty loam (Soil 1), a silty clay loam (Soil 2), and a sandy loam (Soil 3). Washing conditions were investigated for their effects on Cd removal efficiency. Cadmium removal was enhanced by a high humic substance concentration, long washing time, near neutral pH, and large solution/soil ratio. Based on the tradeoff between efficiency and cost, an optimum working condition was established as follows: humic substance concentration (3150 mg C/L), solution pH (6.0), washing time (2 h) and a washing solution/soil ratio (5). A single washing removed 0.55 mg Cd/kg from Soil 1 (1.33 mg Cd/kg), 2.32 mg Cd/kg from Soil 2 (6.57 mg Cd/kg), and 1.97 mg Cd/kg from Soil 3 (2.63 mg Cd/kg). Cd in effluents was effectively treated by adding a small dose of calcium hydroxide, reducing its concentration below the discharge limit of 0.1 mg/L in China. Being cost-effective and safe, humic substances have a great potential to replace common washing agents for the remediation of Cd-contaminated soils. Besides being environmentally benign, humic substances can improve soil physical, chemical, and biological properties. (C) 2017 Elsevier Ltd. All rights reserved. |
| 学科主题 | 土壤环境学 |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | HEAVY-METALS ; PADDY SOILS ; FERRIC-CHLORIDE ; POLLUTED SOILS ; REMEDIATION ; CADMIUM ; FIELD ; ACIDS ; CU ; IMMOBILIZATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000402343700052 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/22492]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 烟台海岸带研究所_近岸生态与环境实验室 烟台海岸带研究所_污染过程与控制实验室 |
| 通讯作者 | Yuan GD(袁国栋) |
| 作者单位 | 1.Chinese Acad Sci, Shandong Prov Key Lab Coastal Environm Proc, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Kangwon Natl Univ, Sch Nat Resources & Environm Sci, Chunchon 24341, South Korea 4.Kangwon Natl Univ, Korea Biochar Res Ctr, Chunchon 24341, South Korea 5.Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Guangdong, Peoples R China 6.Zhejiang A&F Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Linan 311300, Zhejiang, Peoples R China 7.Guangdong Dazhong Agr Sci Co Ltd, Dongguan 523169, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Fande,Yuan, Guodong,Wei, Jing,et al. Humic substances as a washing agent for Cd-contaminated soils[J]. CHEMOSPHERE,2017,181:461-467. |
| APA | Meng, Fande.,Yuan, Guodong.,Wei, Jing.,Bi, Dongxue.,Ok, Yong Sik.,...&袁国栋.(2017).Humic substances as a washing agent for Cd-contaminated soils.CHEMOSPHERE,181,461-467. |
| MLA | Meng, Fande,et al."Humic substances as a washing agent for Cd-contaminated soils".CHEMOSPHERE 181(2017):461-467. |
入库方式： OAI收割
来源：烟台海岸带研究所
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