Changes in metal availability, desorption kinetics and speciation in contaminated soils during repeated phytoextraction with the Zn/Cd hyperaccumulator Sedum plumbizincicola

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

	Changes in metal availability, desorption kinetics and speciation in contaminated soils during repeated phytoextraction with the Zn/Cd hyperaccumulator Sedum plumbizincicola
	Li, Z ; Jia, MY ; Wu, LH ; Christie, P ; Luo, YM
刊名	ENVIRONMENTAL POLLUTION
	2016-02-01
卷号	209 页码:123-131
关键词	Agricultural soils Metal pollution Phytoremediation Availability Metal desorption
ISSN号	0269-7491
通讯作者	Wu, LH (reprint author), Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China. lhwu@issas.ac.cn
产权排序	[Li, Zhu; Wu, Longhua; Christie, Peter; Luo, Yongming] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China; [Jia, Mingyun] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China; [Luo, Yongming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China
英文摘要	Phytoextraction is one of the most promising technologies for the remediation of metal contaminated soils. Changes in soil metal availability during phytoremediation have direct effects on removal efficiency and can also illustrate the interactive mechanisms between hyperaccumulators and metal contaminated soils. In the present study the changes in metal availability, desorption kinetics and speciation in four metal-contaminated soils during repeated phytoextraction by the zinc/cadmium hyperaccumulator Sedum plumbizincicola (S. plumbizincicola) over three years were investigated by chemical extraction and the DGT-induced fluxes in soils (DIFS) model. The available metal fractions (i.e. metal in the soil solution extracted by CaCl2 and by EDTA) decreased greatly by >84% after phytoextraction in acid soils and the deceases were dramatic at the initial stages of phytoextraction. However, the decreases in metal extractable by CaCl2 and EDTA in calcareous soils were not significant or quite low. Large decreases in metal desorption rate constants evaluated by DIFS were found in calcareous soils. Sequential extraction indicated that the acid-soluble metal fraction was easily removed by S. plumbizincicola from acid soils but not from calcareous soils. Reducible and oxidisable metal fractions showed discernible decreases in acid and calcareous soils, indicating that S. plumbizincicola can mobilize non-labile metal for uptake but the residual metal cannot be removed. The results indicate that phytoextraction significantly decreases metal availability by reducing metal pool sizes and/or desorption rates and that S. plumbizincicola plays an important role in the mobilization of less active metal fractions during repeated phytoextraction. (C) 2015 Elsevier Ltd. All rights reserved.
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	SEQUENTIAL EXTRACTION PROCEDURE ; DISSOLVED ORGANIC-MATTER ; HEAVY-METALS ; THLASPI-CAERULESCENS ; TRACE-METALS ; RHIZOSPHERE ; CADMIUM ; CD ; PLANTS ; BCR
收录类别	SCI
语种	英语
WOS记录号	WOS:000369202600015
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/10879]
专题	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 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr 3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc
推荐引用方式 GB/T 7714	Li, Z,Jia, MY,Wu, LH,et al. Changes in metal availability, desorption kinetics and speciation in contaminated soils during repeated phytoextraction with the Zn/Cd hyperaccumulator Sedum plumbizincicola[J]. ENVIRONMENTAL POLLUTION,2016,209:123-131.
APA	Li, Z,Jia, MY,Wu, LH,Christie, P,&Luo, YM.(2016).Changes in metal availability, desorption kinetics and speciation in contaminated soils during repeated phytoextraction with the Zn/Cd hyperaccumulator Sedum plumbizincicola.ENVIRONMENTAL POLLUTION,209,123-131.
MLA	Li, Z,et al."Changes in metal availability, desorption kinetics and speciation in contaminated soils during repeated phytoextraction with the Zn/Cd hyperaccumulator Sedum plumbizincicola".ENVIRONMENTAL POLLUTION 209(2016):123-131.