MGDA-assisted plant washing agent for improving the removal of Cd and Cu from farmland soils

doi:10.1016/j.envpol.2024.124809

	MGDA-assisted plant washing agent for improving the removal of Cd and Cu from farmland soils
	Wang, Yi 1,2; Tu, Chen1 ; Li, Yuan3 ; Yang, Shuai 1; Liu, Ying 1; Zhu, Xia 1; Si, Shao-cheng 3; Luo, Run-lai 4; Pan, Xiang-liang 2; Luo, Yong-ming1
发表期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
	2024-11-15
卷号	361 页码:10
关键词	Heavy metals Farmland soil Fructus mume residue Methylglycinediacetate acid Soil washing
DOI	10.1016/j.envpol.2024.124809
通讯作者	Luo, Yong-ming([email protected])
英文摘要	Utilizing plant extracts for soil washing is a promising and cost-efficient strategy to permanently remove toxic metals from farmland soils. However, the efficiency of current plant extracts in heavy metals removal is constrained by the need of excessively high liquid-solid ratios (>10:1), which limits their practical application in the farmland soils. To address this challenge, we developed a novel binary washing agent consisting of Fructus mume residue extract (RPM) and methylglycinediacetate acid (MGDA). Through optimization experiments, we determined an optimal composition of 50 g L-1 RPM and 0.34 g L-1 MGDA (RPMG3), which exhibited a remarkable synergistic effect on the removal of Cd and Cu from two polluted farmland soils. Compared to the single use of RPM or MGDA, RPMG3 increased metal removal efficiency by 44.6%-303.8% in the alkaline dryland soil and 55.8%-141.9% in the slightly acidic paddy soil, at an optimum liquid-solid ratio of 2:1. The contents of soil Cd and Cu can be reduced to below the risk screening values via acid activation, metal ion exchange, and complexation of functional groups. Moreover, the potential ecological risks associated with Cd in the soils were significantly mitigated due to the decrease in exchangeable and reducible Cd fractions following RPMG3 washing. Additionally, RPM and RPMG3 washing led to enhancements in soil organic carbon and nutrient concentrations, as well as increased activities of soil enzymes including catalase, urease, and beta-glucosidase. Notably, RPMG3 washing exhibited the most pronounced promotion effect on wheat seed germination and growth. Taken together, the binary complex of RPMG3 demonstrates potential as an environmentally friendly green washing agent capable of in reducing heavy metals from farmland soil with great efficiency, even at low liquid-solid ratios.
资助机构	National Science Foundation of China ; National Key Research and Development Program of China ; CSCEC Eco-Environmental Engineering Research Center (Soil Remediation Technology and Equipment) ; China Construction Eighth Engineering Division Co., Ltd.
收录类别	SCI
语种	英语
关键词[WOS]	HEAVY-METALS ; CHELATING-AGENTS ; WASTE ; ZN ; BIOAVAILABILITY ; FEASIBILITY ; BIOSORPTION ; MECHANISM ; SORPTION ; COPPER
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:001313515200001
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/35639
专题	中国科学院海岸带环境过程与生态修复重点实验室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
通讯作者	Luo, Yong-ming
作者单位	1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Zhejiang Univ Technol, Coll Environm, Key Lab Microbial Technol Ind Pollut Control Zheji, Hangzhou 310014, Peoples R China 3.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China 4.China Construct Eighth Engn Div Co Ltd, CSCEC Ecoenvironm Engn Res Ctr Soil Remediat Techn, Shanghai 200444, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yi,Tu, Chen,Li, Yuan,et al. MGDA-assisted plant washing agent for improving the removal of Cd and Cu from farmland soils[J]. ENVIRONMENTAL POLLUTION,2024,361:10.
APA	Wang, Yi.,Tu, Chen.,Li, Yuan.,Yang, Shuai.,Liu, Ying.,...&Luo, Yong-ming.(2024).MGDA-assisted plant washing agent for improving the removal of Cd and Cu from farmland soils.ENVIRONMENTAL POLLUTION,361,10.
MLA	Wang, Yi,et al."MGDA-assisted plant washing agent for improving the removal of Cd and Cu from farmland soils".ENVIRONMENTAL POLLUTION 361(2024):10.