Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil

This study presents the feasibility of using the vertical electrokinetic-flushing technology for the simultaneous removal of cadmium (Cd), lead (Pb), zinc (Zn), as well as phenanthrene and pyrene from contaminated soils. Eight vertical bench-scale electrokinetic-flushing experiments were conducted a...

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Main Authors: Giannis, Apostolos, Tay, Eugene, Kao, Jimmy, Wang, Jing-Yuan
Other Authors: Residues and Resource Reclamation Centre
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/102006
http://hdl.handle.net/10220/11168
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1020062020-03-07T12:48:43Z Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil Giannis, Apostolos Tay, Eugene Kao, Jimmy Wang, Jing-Yuan Residues and Resource Reclamation Centre This study presents the feasibility of using the vertical electrokinetic-flushing technology for the simultaneous removal of cadmium (Cd), lead (Pb), zinc (Zn), as well as phenanthrene and pyrene from contaminated soils. Eight vertical bench-scale electrokinetic-flushing experiments were conducted analyzing the effect of treatment duration, initial soil water content and soil type. The highest removal efficiency was achieved for Cd (82%), followed by Zn (73%) and Pb (37%) from natural soil after 8 days of treatment with water content 60%. The study demonstrated that the metals were extracted from the soil mainly due to the dominated low pH conditions and vertically migrated from anode towards the cathode. Besides, it was found that the removal efficiency was increased in the experiments with higher treatment duration, while the higher soil water content further enhances metals removal. In terms of the organic pollutants, under the conditions conducted the electrokinetic-flushing treatment, low removal efficiency for phenanthrene (29%) and pyrene (19%) was achieved. However, it is noticeable that without the use of any solubilizing agent the organic pollutants could be removed following the movement of the pore fluid. 2013-07-11T02:44:49Z 2019-12-06T20:48:15Z 2013-07-11T02:44:49Z 2019-12-06T20:48:15Z 2012 2012 Journal Article Giannis, A., Tay, E., Kao, J., Wang, J.-Y. (2012). Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil. Electrochimica Acta, 86, 72-79. https://hdl.handle.net/10356/102006 http://hdl.handle.net/10220/11168 10.1016/j.electacta.2012.04.034 191108 en Electrochimica acta © 2012 Elsevier Ltd.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description This study presents the feasibility of using the vertical electrokinetic-flushing technology for the simultaneous removal of cadmium (Cd), lead (Pb), zinc (Zn), as well as phenanthrene and pyrene from contaminated soils. Eight vertical bench-scale electrokinetic-flushing experiments were conducted analyzing the effect of treatment duration, initial soil water content and soil type. The highest removal efficiency was achieved for Cd (82%), followed by Zn (73%) and Pb (37%) from natural soil after 8 days of treatment with water content 60%. The study demonstrated that the metals were extracted from the soil mainly due to the dominated low pH conditions and vertically migrated from anode towards the cathode. Besides, it was found that the removal efficiency was increased in the experiments with higher treatment duration, while the higher soil water content further enhances metals removal. In terms of the organic pollutants, under the conditions conducted the electrokinetic-flushing treatment, low removal efficiency for phenanthrene (29%) and pyrene (19%) was achieved. However, it is noticeable that without the use of any solubilizing agent the organic pollutants could be removed following the movement of the pore fluid.
author2 Residues and Resource Reclamation Centre
author_facet Residues and Resource Reclamation Centre
Giannis, Apostolos
Tay, Eugene
Kao, Jimmy
Wang, Jing-Yuan
format Article
author Giannis, Apostolos
Tay, Eugene
Kao, Jimmy
Wang, Jing-Yuan
spellingShingle Giannis, Apostolos
Tay, Eugene
Kao, Jimmy
Wang, Jing-Yuan
Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil
author_sort Giannis, Apostolos
title Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil
title_short Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil
title_full Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil
title_fullStr Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil
title_full_unstemmed Impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil
title_sort impact of vertical electrokinetic-flushing technology to remove heavy metals and polycyclic aromatic hydrocarbons from contaminated soil
publishDate 2013
url https://hdl.handle.net/10356/102006
http://hdl.handle.net/10220/11168
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