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Feasibility of a combined solubilization and eluent drainage system to remove Cd and Cu from agricultural soil

文献类型：期刊论文

作者Yang, Shuai1,2,4; Li, Yuan1,4; Si, Shaocheng1,2,4; Liu, Guoming3; Yun, Hao1,2,4; Tu, Chen1,4; Li, Lianzhen1,4; Luo, Yongming1,2,3,4
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2022-02-10
卷号807页码:10
关键词Agricultural soil Citric acid Heavy metals Washing Regeneration Pilot scale remediation
ISSN号0048-9697
DOI10.1016/j.scitotenv.2021.150733
通讯作者Luo, Yongming(ymluo@issas.ac.cn)
英文摘要Washing using low-molecular-weight organic acid is an effective and eco-friendly technique to permanently remove heavy metals from soil. There is still lack of evaluation of the application modes and the recovery methods, as well as the variations of heavy metal and nutrients fractions on a pilot-scale during washing. Here, we developed a simple combined solubilization and eluent drainage system in a pilot-scale washing box using industrial grade citric acid with feasible waste eluent treatment method to remove cadmium (Cd) and copper (Cu) from agricultural soil. The removal rates of Cd and Cu after sequential two-stage citric acid-water washing reach up 68.9% and Cu 41.4%, which was 7.5% and 10.0% higher than single citric acid. The removed the heavy metals were mainly in exchangeable and reducible fractions. The heavy metals at different soil depth were dissolved more effectively by citric acid-water washing with wheat straw as underdrain filling material than that of crushed stone. The potential risks of Cd in soils all decreased by approximately 75% from considerable to low risk. The two-stage citric acid-water washing significantly mitigated the effect of soil acidification. The average contents of soil organic matter, available ammonium N-NH4 and available phosphorus increased by 40.9%, 57.3%, 32.0% after citric acid-water washing under wheat straw filling. The waste eluent can be efficiently recovered by clam powder, which removed 78.7% of Cd and 57.5% of Cu. The regenerated citric acid showed similar removal efficiencies for Cd and Cu compared to the fresh citric acid. These results indicate that the combination of washing, drainage and flocculation can effectively remove Cd and Cu from contaminated agricultural soil and realize the recycling of waste eluent. (C) 2021 Elsevier B.V. All rights reserved.
WOS关键词DISSOLVED ORGANIC-MATTER ; HEAVY-METALS ; CONTAMINATED SOIL ; HUMIC SUBSTANCES ; CITRIC-ACID ; RESIDUAL METALS ; WASHING AGENT ; SEWAGE-SLUDGE ; REMEDIATION ; EDTA
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000711162900002
资助机构Major Project of National Natural Science Foundation of China
源URL[http://ir.yic.ac.cn/handle/133337/30714]  
专题烟台海岸带研究所_近岸生态与环境实验室
通讯作者Luo, Yongming
作者单位1.YICCAS, Shandong Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, CAS Key Lab Soil Environm & Pollut Remediat, Inst Soil Sci, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Shuai,Li, Yuan,Si, Shaocheng,et al. Feasibility of a combined solubilization and eluent drainage system to remove Cd and Cu from agricultural soil[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,807:10.
APA Yang, Shuai.,Li, Yuan.,Si, Shaocheng.,Liu, Guoming.,Yun, Hao.,...&Luo, Yongming.(2022).Feasibility of a combined solubilization and eluent drainage system to remove Cd and Cu from agricultural soil.SCIENCE OF THE TOTAL ENVIRONMENT,807,10.
MLA Yang, Shuai,et al."Feasibility of a combined solubilization and eluent drainage system to remove Cd and Cu from agricultural soil".SCIENCE OF THE TOTAL ENVIRONMENT 807(2022):10.

入库方式： OAI收割

来源：烟台海岸带研究所

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