Feasibility of a combined solubilization and eluent drainage system to remove Cd and Cu from agricultural soil
Yang, Shuai1,3,4; Li, Yuan1,4; Si, Shaocheng1,3,4; Liu, Guoming2; Yun, Hao1,3,4; Tu, Chen1,4; Li, Lianzhen1,4; Luo, Yongming1,2,3,4
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
2022-02-10
Volume807Pages:10
KeywordAgricultural soil Citric acid Heavy metals Washing Regeneration Pilot scale remediation
DOI10.1016/j.scitotenv.2021.150733
Corresponding AuthorLuo, Yongming(ymluo@issas.ac.cn)
AbstractWashing 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.
Funding OrganizationMajor Project of National Natural Science Foundation of China
Indexed BySCI
Language英语
WOS KeywordDISSOLVED ORGANIC-MATTER ; HEAVY-METALS ; CONTAMINATED SOIL ; HUMIC SUBSTANCES ; CITRIC-ACID ; RESIDUAL METALS ; WASHING AGENT ; SEWAGE-SLUDGE ; REMEDIATION ; EDTA
WOS Research AreaEnvironmental Sciences & Ecology
WOS IDWOS:000711162900002
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/30715
Collection中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
Corresponding AuthorLuo, Yongming
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Soil Environm & Pollut Remediat, Inst Soil Sci, Nanjing 210008, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.YICCAS, Shandong Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China
Recommended Citation
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.
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