Electrokinetic remediation of nickel from low permeability soil

Saleem, M.; Chakrabarti, M.H.; Irfan, M.F.; Hajimolana, S.A.; Hussain, M.A.; Diya'uddeen, B.H.; Daud, W.M.A.W. (2011) Electrokinetic remediation of nickel from low permeability soil. International Journal of Electrochemical Science, 6 (9). pp. 4264-4275. ISSN 1452-3981

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Abstract

Electrokinetic remediation of nickel from low permeability soil using titanium electrodes having inter-electrode spacing of 10 cm was carried out in a cylindrical reactor. The influences of current density, voltage gradient and electrolyte pH were investigated upon removal efficiency for 60 h experimental runs. Efficiency improved from 49.3 to 57.2 when the current density was increased from 4.36 mA/cm 2 to 13.1 mA/cm 2. Furthermore, an enhancement in efficiency from 38.5 to 54.3 was observed when voltage gradient increased from 1 V/cm to 2 V/cm (at 13.1 mA/cm 2). Further increase in voltage gradient to 2.5 V/cm improved efficiency during initial runs. However, an overall reduction of 3.2 was observed after 60 h of operation in comparison to that obtained at 2 V/cm. This may be attributed to precipitation and localized accumulation of metallic ions. An inverse relationship between efficiency and electrolyte pH was also observed (at 13.1 mA/cm 2 and 2 V/cm). Although a removal of 74.1 was achieved at pH = 4.5, the system required optimization as the nickel content in treated soil was above the maximum values given in international standards.

Item Type: Article
Creators:
  1. Saleem, M.
  2. Chakrabarti, M.H.
  3. Irfan, M.F.
  4. Hajimolana, S.A.(Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia)
  5. Hussain, M.A.(Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia)
  6. Diya'uddeen, B.H.
  7. Daud, W.M.A.W.(Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MALAYSIA)
Journal or Publication Title: International Journal of Electrochemical Science
Additional Information: 854NL Times Cited:2 Cited References Count:34
Uncontrolled Keywords: Electrokinetic process, Nickel, Low permeability soil, Removal efficiency, Current density, Contaminated soil, Heavy-metals, Removal, Chromium, Cadmium.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 10 Jul 2013 09:26
Last Modified: 08 Nov 2017 16:46
URI: http://eprints.um.edu.my/id/eprint/7012

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