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

doi:10.1016/j.scitotenv.2021.150733

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室 > 近岸生态与环境实验室

	Feasibility of a combined solubilization and eluent drainage system to remove Cd and Cu from agricultural soil
	Yang, Shuai 1,2,4; Li, Yuan 1,4; Si, Shaocheng 1,2,4; Liu, Guoming 3; Yun, Hao 1,2,4; Tu, Chen 1,4; Li, Lianzhen 1,4; Luo, Yongming 1,2,3,4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	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
DOI	10.1016/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
内容类型	期刊论文
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.