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	Electrokinetic remediation of a Cu-Zn contaminated red soil by controlling the voltage and conditioning catholyte pH
	Zhou, DM; Deng, CF; Cang, L; Alshawabkeh, AN
刊名	CHEMOSPHERE
	2005-10-01
卷号	61期号:4页码:519-527
关键词	red soil electrokinetic remediation Cu Zn lactic acid enhancing reagents
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2005.02.055
通讯作者	Zhou, DM(dmzhou@issas.ac.cn)
英文摘要	Electrokinetics is an innovative technique for treating heavy metals contaminated soil, especially low pH soils such as the Chinese red soil (Udic Ferrisols). In this paper, a Cu-Zn contaminated red soil is treated by electrokinetics. When the Cu-Zn contaminated red soil was treated without control of catholyte pH during the electrokinetic treatment, the soil pH in the soil sections near cathode after the experiment was high above 6, which resulted in accumulation of large amounts of Cu and Zn in the soil sections with such high pH values. Compared to soil Cu, soil Zn was more efficiently removed from the soil by a controlled electrokinetic method. Application of lactic acid as catholyte pH conditioning solution caused an efficient removal of Cu and Zn from the soil. Increasing the electrolyte strength (salt concentration) of the conditioning solution further increased Cu removal, but did not cause a significant improvement for soil Zn. Soil Cu and Zn fractions after the electrokinetic treatments were analyzed using sequential extraction method, which indicated that Cu and Zn precipitation in the soil section closest to the cathode in the treatments without catholyte pH control limited their removal from the soil column. When the catholyte pH was controlled by lactic acid and CaCl2, the soil Cu and Zn removal percentage after 554 h running reached 63% and 65%, respectively. Moreover, both the residual soil Cu and Zn concentrations were lower than 100 mg kg(-1), which is adequate and meets the requirement of the Chinese soil environmental quality standards. (C) 2005 Elsevier Ltd. All rights reserved.
收录类别	SCI
WOS关键词	ELECTRODIALYTIC REMEDIATION ; HEAVY-METALS ; REMOVAL ; COPPER ; EXTRACTION ; LEAD ; PHYTOREMEDIATION ; PHYTOEXTRACTION ; KAOLINITE ; PLANTS
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000232898600009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558506
专题	南京土壤研究所
通讯作者	Zhou, DM
作者单位	1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Northeastern Univ, Dept Civil & Environm Engn, Boston, MA 02115 USA
推荐引用方式 GB/T 7714	Zhou, DM,Deng, CF,Cang, L,et al. Electrokinetic remediation of a Cu-Zn contaminated red soil by controlling the voltage and conditioning catholyte pH[J]. CHEMOSPHERE,2005,61(4):519-527.
APA	Zhou, DM,Deng, CF,Cang, L,&Alshawabkeh, AN.(2005).Electrokinetic remediation of a Cu-Zn contaminated red soil by controlling the voltage and conditioning catholyte pH.CHEMOSPHERE,61(4),519-527.
MLA	Zhou, DM,et al."Electrokinetic remediation of a Cu-Zn contaminated red soil by controlling the voltage and conditioning catholyte pH".CHEMOSPHERE 61.4(2005):519-527.

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