Equilibrium and column studies of iron exchange with strong acid cation resin

Millar, Graeme J., Schot, Aaron, Couperthwaite, Sara J., Shilling, Amy, Nuttall, Kenneth, & de Bruyn, Mitchell (2015) Equilibrium and column studies of iron exchange with strong acid cation resin. Journal of Environmental Chemical Engineering, 3(1), pp. 373-385.

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Abstract

The exchange of iron species from iron (III) chloride solutions with a strong acid cation resin has been investigated in relation to a variety of water and wastewater applications. A detailed equilibrium isotherm analysis was conducted wherein models such as Langmuir Vageler, Competitive Langmuir, Freundlich, Temkin, Dubinin Astakhov, Sips and Brouers-Sotolongo were applied to the experimental data. An important conclusion was that both the bottle-point method and solution normality used to generate the ion exchange equilibrium information influenced which sorption model fitted the isotherm profiles optimally. Invariably, the calculated value for the maximum loading of iron on strong acid cation resin was substantially higher than the value of 47.1 g/kg of resin which would occur if one Fe3+ ion exchanged for three “H+” sites on the resin surface. Consequently, it was suggested that above pH 1, various iron complexes sorbed to the resin in a manner which required less than 3 sites per iron moiety. Column trials suggested that the iron loading was 86.6 g/kg of resin when 1342 mg/L Fe (III) ions in water were flowed at 31.7 bed volumes per hour. Regeneration with 5 to 10 % HCl solutions reclaimed approximately 90 % of exchange sites.

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ID Code: 81969
Item Type: Journal Article
Refereed: Yes
Keywords: ion exchange, iron, strong acid cation resin, equilibrium, column
DOI: 10.1016/j.jece.2014.12.023
ISSN: 2213-3437
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Elsevier Ltd.
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Environmental Chemical Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Environmental Chemical Engineering, Volume 3, Issue 1, (March 2015), DOI: 10.1016/j.jece.2014.12.023
Deposited On: 22 Feb 2015 23:51
Last Modified: 02 Mar 2015 17:50

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