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; 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
发表期刊ENVIRONMENTAL POLLUTION
ISSN0269-7491
2016-02-01
卷号209页码:123-131
关键词Agricultural Soils Metal Pollution Phytoremediation Availability Metal Desorption
DOI10.1016/j.envpol.2015.11.015
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
作者部门中科院海岸带环境过程与生态修复重点实验室
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.
文章类型Article
资助机构National High Technology Research and Development Program of China(2012AA101402-2) ; National Natural Science Foundation of China(41325003 ; 41271326)
收录类别SCI
语种英语
关键词[WOS]SEQUENTIAL EXTRACTION PROCEDURE ; DISSOLVED ORGANIC-MATTER ; HEAVY-METALS ; THLASPI-CAERULESCENS ; TRACE-METALS ; RHIZOSPHERE ; CADMIUM ; CD ; PLANTS ; BCR
研究领域[WOS]Environmental Sciences & Ecology
WOS记录号WOS:000369202600015
引用统计
被引频次:33[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/10879
专题中国科学院海岸带环境过程与生态修复重点实验室
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
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
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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,&Wu, LH .(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.
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