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Adsorption of anionic dyes on a reversibly swelling cationic superabsorbent polymer

Shukla, Neelesh Bharti and Madras, Giridhar (2012) Adsorption of anionic dyes on a reversibly swelling cationic superabsorbent polymer. In: JOURNAL OF APPLIED POLYMER SCIENCE, 127 (3). pp. 2251-2258.

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Official URL: http://dx.doi.org/10.1002/app.37929


A cationic monomer 2-(methacryloyloxy)ethyl]trimethylammonium chloride was polymerized using N,N'-methylenebisacrylamide as the crosslinker to obtain a cationic superabsorbent polymer (SAP). This SAP was characterized by Fourier transform-infrared spectroscopy, and the equilibrium swelling capacity was determined by swelling in water. The SAP was subjected to cyclic swelling/deswelling in water and NaCl solution. The conductivity of the swelling medium was monitored during the swelling/deswelling and was related to the swelling/deswelling characteristics of the SAP. The adsorption of five anionic dyes of different classes on the SAP was carried out and was found to follow the first-order kinetics. The Langmuir adsorption isotherms were found to fit the equilibrium adsorption data. The dye adsorption capacity of the SAP synthesized in this study was higher than that obtained for other hydrogels reported in the literature. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Item Type: Journal Article
Additional Information: Copyright for this article belongs to WILEY-BLACKWELL, USA
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 13 Dec 2012 06:04
Last Modified: 13 Feb 2013 10:46
URI: http://eprints.iisc.ac.in/id/eprint/45509

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