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Lookup NU author(s): Dr Bulent Keskinler, Professor Galip Akay
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Monolithic PolyHIPE Polymer (PHP), being a highly porous, low density, open cellular material was produced by polymerization of a high internal phase emulsion (HIPE) in which the polymerizable continuous phase consisted of monomers, styrene (STY), and divinyl benzene (DVB). The inner dispersed phase (90 vol %) was an aqueous solution containing 0.4 wt % potassium persulphate as initiator. The resulting porous structure had 12% crosslinking density. Surface chemistry of the monoliths was modified by chloromethylation and amination to impart anionic functionality. Surface modified monoliths had ion exchange capacity of 3.01 meq/g, and had the ability to uptake water about 10 times of its mass. It was used Cr (VI) ion removal from aqueous solution. The experimental results investigated for both the Langmuir and the Dubinin-Radushkevich adsorption models. The maximum Cr (VI) adsorptions are 126.6 mg Cr (VI)/g and 129.3 mg Cr (VI)/g, respectively. The mean free energy E of adsorption is 11.18 kJ/mol according to the Dubinin-Radushkevich adsorption model, indicating that the adsorption occurs through a chemical ion-exchange process and it is not diffusion limited. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42286.
Author(s): Barlik N, Keskinler B, Kocakerim MM, Akay G
Publication type: Article
Publication status: Published
Journal: Journal of Applied Polymer Science
Year: 2015
Volume: 132
Issue: 29
Print publication date: 05/08/2015
Online publication date: 18/04/2015
Acceptance date: 31/03/2015
ISSN (print): 0021-8995
ISSN (electronic): 1097-4628
Publisher: Wiley-Blackwell
URL: http://dx.doi.org/10.1002/app.42286
DOI: 10.1002/app.42286
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