Nitrogen of EDDS enhanced removal of potentially toxic elements and attenuated their oxidative stress in a phytoextraction process

doi:10.1016/j.envpol.2020.115719

	Nitrogen of EDDS enhanced removal of potentially toxic elements and attenuated their oxidative stress in a phytoextraction process
	Beiyuan, Jingzi 2,3; Fang, Linchuan 2,4; Chen, Hansong 2,5; Li, Mengdi 2; Liu, Dongdong 2; Wang, Yunqiang 1,6
刊名	ENVIRONMENTAL POLLUTION
	2021
卷号	268 页码:10
关键词	Chelating agent Heavy metal Phytoremediation Nutrient Antioxidant enzyme activity
ISSN号	0269-7491
DOI	10.1016/j.envpol.2020.115719
通讯作者	Fang, Linchuan(flinc@nwafu.edu.cn)
英文摘要	(S,S)-ethylenediaminedisuccinic acid (EDDS) has a strong capacity to mobilize potentially toxic elements (PTEs) in phytoextraction. It can release NH4+-N via biodegradation, which can enhance N supply to soil thereafter promote plant growth and plant resistance to PTEs. However, the advanced feature of released N in the EDDS-enhanced phytoextraction remains unclear. In the current study, the effects of N supply released from EDDS on ryegrass phytoextraction and plant resistance to PTEs were investigated in detail by a comparison with urea. Our results supported that the addition of both EDDS and urea increased N concentration in soil solution, yet EDDS needed more time to release available N for plant uptake and transported more N from root to shoot. Additionally, EDDS significantly increased the concentration of all targeted PTEs, i.e. Cu, Zn, Cd, and Pb, in the soil solution, which results in higher levels of their occurrence in plant biomass compared with urea. By contrast, the supply of N slightly enhanced the ryegrass uptake of micro-nutrients, i.e. Cu and Zn, yet it caused negligible effects on nonessential elements, i.e. Cd and Pb. The mobilized PTEs by EDDS lead to elevated oxidative stress because higher levels of malondialdehyde and O-2(center dot-) were observed. The supply of N attenuated oxidative stress caused by O-2(center dot-) and H2O2, which was associated with enhanced activities of superoxide dismutase and peroxidase. Our results advanced the understanding of the exogenous N supply and metal resistance mechanisms in the EDDS-enhanced phytoextraction. This study also highlighted that EDDS can serve as a N source to ease N-deficient problems in PTEs-contaminated soils. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[41977031] ; CAS Light of West China Program[XAB2016A03] ; Program of the State Key Laboratory of Loess and Quaternary Geology, CAS, China[SKLLQGZR1803] ; Joint Fund of Basic and Applied Basic Research Fund of Guangdong Province, China[2019A1515110927]
WOS关键词	METAL-CONTAMINATED SOILS ; KINETIC INTERACTIONS ; HEAVY-METALS ; PLANT UPTAKE ; PHYTOREMEDIATION ; CADMIUM ; EDTA ; BIODEGRADATION ; ANTIOXIDANTS ; REMEDIATION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000600553000076
资助机构	National Natural Science Foundation of China ; CAS Light of West China Program ; Program of the State Key Laboratory of Loess and Quaternary Geology, CAS, China ; Joint Fund of Basic and Applied Basic Research Fund of Guangdong Province, China
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15805]
专题	地球环境研究所_生态环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Fang, Linchuan
作者单位	1.Inst Earth Environm CAS, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 5.Zhejiang Normal Univ, Coll Xingzhi, Jinhua 321000, Zhejiang, Peoples R China 6.Xi An Jiao Tong Univ, Dept Earth & Environm Sci, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Beiyuan, Jingzi,Fang, Linchuan,Chen, Hansong,et al. Nitrogen of EDDS enhanced removal of potentially toxic elements and attenuated their oxidative stress in a phytoextraction process[J]. ENVIRONMENTAL POLLUTION,2021,268:10.
APA	Beiyuan, Jingzi,Fang, Linchuan,Chen, Hansong,Li, Mengdi,Liu, Dongdong,&Wang, Yunqiang.(2021).Nitrogen of EDDS enhanced removal of potentially toxic elements and attenuated their oxidative stress in a phytoextraction process.ENVIRONMENTAL POLLUTION,268,10.
MLA	Beiyuan, Jingzi,et al."Nitrogen of EDDS enhanced removal of potentially toxic elements and attenuated their oxidative stress in a phytoextraction process".ENVIRONMENTAL POLLUTION 268(2021):10.