Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils

An enhanced electrokinetic process for the removal of cadmium (Cd), nickel (Ni) and zinc (Zn) from contaminated soils was performed. The efficiency of the chelate agents nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA) and diaminocycloexanetetraacetic acid (DCyTA) was examined...

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Main Authors: Giannisa, Apostolos, Pentari, Despina, Wang, Jing-Yuan, Gidarakos, Evangelos
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2016
Subjects:
Online Access:https://hdl.handle.net/10356/80195
http://hdl.handle.net/10220/40461
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-801952020-03-07T11:43:30Z Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils Giannisa, Apostolos Pentari, Despina Wang, Jing-Yuan Gidarakos, Evangelos School of Civil and Environmental Engineering Residues and Resource Reclamation Centre Electrokinetic remediation Heavy metals Sequential extraction analysis Chelate agents An enhanced electrokinetic process for the removal of cadmium (Cd), nickel (Ni) and zinc (Zn) from contaminated soils was performed. The efficiency of the chelate agents nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA) and diaminocycloexanetetraacetic acid (DCyTA) was examined under constant potential gradient (1.23 V/cm). The results showed that chelates were effective in desorbing metals at a high pH, with metal–chelate anion complexes migrating towards the anode. At low pH, metals existing as dissolved cations migrated towards the cathode. In such conflicting directions, the metals accumulated in the middle of the cell. Speciation of the metals during the electrokinetic experiments was performed to provide an understanding of the distribution of the Cd, Ni and Zn. The results of sequential extraction analysis revealed that the forms of the metals could be altered from one fraction to another due to the variation of physico-chemical conditions throughout the cell, such as pH, redox potential and the chemistry of the electrolyte solution during the electrokinetic treatment. It was found that binding forms of metals were changed from the difficult type to easier extraction type. 2016-04-18T08:54:25Z 2019-12-06T13:42:40Z 2016-04-18T08:54:25Z 2019-12-06T13:42:40Z 2010 2010 Journal Article Giannis, A., Pentari, D., Wang, J. Y., & Gidarakos, E. (2010). Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils. Journal of Hazardous Materials, 184(1-3), 547-554. 0304-3894 https://hdl.handle.net/10356/80195 http://hdl.handle.net/10220/40461 10.1016/j.jhazmat.2010.08.070 190953 en Journal of Hazardous Materials © 2010 Elsevier B.V.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Electrokinetic remediation
Heavy metals
Sequential extraction analysis
Chelate agents
spellingShingle Electrokinetic remediation
Heavy metals
Sequential extraction analysis
Chelate agents
Giannisa, Apostolos
Pentari, Despina
Wang, Jing-Yuan
Gidarakos, Evangelos
Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils
description An enhanced electrokinetic process for the removal of cadmium (Cd), nickel (Ni) and zinc (Zn) from contaminated soils was performed. The efficiency of the chelate agents nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA) and diaminocycloexanetetraacetic acid (DCyTA) was examined under constant potential gradient (1.23 V/cm). The results showed that chelates were effective in desorbing metals at a high pH, with metal–chelate anion complexes migrating towards the anode. At low pH, metals existing as dissolved cations migrated towards the cathode. In such conflicting directions, the metals accumulated in the middle of the cell. Speciation of the metals during the electrokinetic experiments was performed to provide an understanding of the distribution of the Cd, Ni and Zn. The results of sequential extraction analysis revealed that the forms of the metals could be altered from one fraction to another due to the variation of physico-chemical conditions throughout the cell, such as pH, redox potential and the chemistry of the electrolyte solution during the electrokinetic treatment. It was found that binding forms of metals were changed from the difficult type to easier extraction type.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Giannisa, Apostolos
Pentari, Despina
Wang, Jing-Yuan
Gidarakos, Evangelos
format Article
author Giannisa, Apostolos
Pentari, Despina
Wang, Jing-Yuan
Gidarakos, Evangelos
author_sort Giannisa, Apostolos
title Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils
title_short Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils
title_full Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils
title_fullStr Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils
title_full_unstemmed Application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils
title_sort application of sequential extraction analysis to electrokinetic remediation of cadmium, nickel and zinc from contaminated soils
publishDate 2016
url https://hdl.handle.net/10356/80195
http://hdl.handle.net/10220/40461
_version_ 1681038544017031168