Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator

doi:10.1016/j.chemosphere.2017.12.005

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

	Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator
	Li, Zhu ; Wu, Longhua ; Luo, Yongming ; Christie, Peter
刊名	CHEMOSPHERE
	2018-03
卷号	194 页码:432-440
关键词	Soil metals Phytoremediation The two first-order reactions model Kinetic extraction Environmental risk
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2017.12.005
产权排序	[Li, Zhu ; Wu, Longhua ; Luo, Yongming ; Christie, Peter] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China ; [Luo, Yongming] Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China
文献子类	Article
英文摘要	Phytoextraction is one of the most promising technologies for the decontamination of metal-polluted agricultural soils. Effects of repeated phytoextraction by the cadmium (Cd)/zinc (Zn) hyperaccumulator Sedum plumbizincicola on metal (Cd, Zn, copper (Cu) and lead (Pb)) mobility were investigated in three contaminated soils with contrasting properties. EDTA kinetic extraction and the two first-order reactions model showed advantages in the assessment of soil metal mobility and clearly discriminated changes in metal fractions induced by phytoextraction. Repeated phytoextraction led to large decreases in readily labile (Q(1)(0)) and less labile (Q(2)(0)) fractions of Cd and Zn in all three soils with the sole exception of an increase in the Q(2)(0) of Zn in the highly polluted soil. However, Q(1)(0) fractions of soil Cu and Pb showed apparent increases with the sole exception of Pb in the acid polluted soil but showed a higher desorption rate constant (k(1)). Furthermore, S. plumbizincicola decreased the non-labile fraction (Q(3)(0)) of all metals tested, indicating that the hyperaccumulator can redistribute soil metals from non-labile to labile fractions. This suggests that phytoextraction decreased the mobility of the metals hyperaccumulated by the plant (Cd and Zn) but increased the mobility of the metals not hyperaccumulated (Cu and Pb). Thus, phytoextraction of soils contaminated with mixtures of metals must be performed carefully because of potential increases in the mobility of non-hyperaccumulated metals in the soil and the consequent environmental risks. (C) 2017 Elsevier Ltd. All rights reserved.
WOS关键词	HEAVY-METALS ; RHIZOSPHERE CHARACTERISTICS ; POLYCHLORINATED-BIPHENYLS ; REPEATED PHYTOEXTRACTION ; NICKEL HYPERACCUMULATOR ; SEDUM-PLUMBIZINCICOLA ; RISK-ASSESSMENT ; ORGANIC-MATTER ; CHINA ; MOBILIZATION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000423890700047
资助机构	National Natural Science Foundation of China [41325003, 41501348]
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24391]
专题	烟台海岸带研究所_近岸生态与环境实验室烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; 2.Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhu,Wu, Longhua,Luo, Yongming,et al. Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator[J]. CHEMOSPHERE,2018,194:432-440.
APA	Li, Zhu,Wu, Longhua,Luo, Yongming,&Christie, Peter.(2018).Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator.CHEMOSPHERE,194,432-440.
MLA	Li, Zhu,et al."Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator".CHEMOSPHERE 194(2018):432-440.