| 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
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| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| 2022-02-10 | |
| Volume | 807Pages:10 |
| Keyword | Agricultural soil Citric acid Heavy metals Washing Regeneration Pilot scale remediation |
| DOI | 10.1016/j.scitotenv.2021.150733 |
| Corresponding Author | Luo, Yongming(ymluo@issas.ac.cn) |
| Abstract | 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. |
| Funding Organization | Major Project of National Natural Science Foundation of China |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | DISSOLVED ORGANIC-MATTER ; HEAVY-METALS ; CONTAMINATED SOIL ; HUMIC SUBSTANCES ; CITRIC-ACID ; RESIDUAL METALS ; WASHING AGENT ; SEWAGE-SLUDGE ; REMEDIATION ; EDTA |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS ID | WOS:000711162900002 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.yic.ac.cn/handle/133337/30715 |
| Collection | 中科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 Author | Luo, Yongming |
| Affiliation | 1.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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