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Comparative performance of ion exchange membranes for electrodialysis of nickel and cobalt

Lookup NU author(s): Nick Tzanetakis, Dr Wathiq Taama, Emeritus Professor Keith Scott, Dr Roshan Jachuck

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Abstract

The extraction of nickel and cobalt from their sulfate solutions by electrodialysis in a modified three compartment cell is described. Two cation exchange membranes, the perfluorosulfonic NafionĀ® 117 and a new sulfonated PVDF membrane, are compared under similar operating conditions. The membranes are used as either flat structures or as corrugated structures. The effect of flow rate, current density, salt concentration and temperature on the performance of each membrane is described. The performance is characterised in terms of transport properties, current efficiencies and concentrations of metal ions transported through each membrane. The performance of the PVDF membrane was as good as; if not slightly better, than that of the commercial Nafion 117. A significant improvement with the use of corrugated membranes on the amounts of metal extracted is observed. The corrugated Nafion 117 membrane gave superior current efficiencies compared to the flat one with the same amount of charged passed. Separation of cobalt from nickel by electrodialysis in mixed solution has also been investigated. Ā© 2002 Elsevier Science B.V. All rights reserved.


Publication metadata

Author(s): Tzanetakis N, Taama WM, Scott K, Jachuck RJJ, Slade RS, Varcoe J

Publication type: Article

Publication status: Published

Journal: Separation and Purification Technology

Year: 2003

Volume: 30

Issue: 2

Pages: 113-127

ISSN (print): 1383-5866

ISSN (electronic): 1873-3794

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/S1383-5866(02)00139-9

DOI: 10.1016/S1383-5866(02)00139-9


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