Synthesis and characterization of a few amino - functionalized copolymeric resins and their environmental applications / Muniyappan Rajiv Gandhi in Industrial & engineering chemistry research, Vol. 51 N° 16 (Avril 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 16 (Avril 2012) . - pp. 5677–5684 Titre : Synthesis and characterization of a few amino - functionalized copolymeric resins and their environmental applications Type de document : texte imprimé Auteurs : Muniyappan Rajiv Gandhi, Auteur ; Natrayasamy Viswanathan, Auteur ; Sankaran Meenakshi, Auteur Année de publication : 2012 Article en page(s) : pp. 5677–5684 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Polymeric resins Adsorption Résumé : The synthetic copolymeric resins acrylonitrile/divinylbenzene/vinylbenzyl chloride (AN/DVB/VBC), styrene/divinylbenzene/vinylbenzyl chloride (ST/DVB/VBC), and vinylbenzyl chloride/divinylbenzene (VBC/DVB) have been prepared by suspension polymerization. These polymeric matrixes were aminated with ethylenediamine (ED) and then protonated to increase their selectivity toward Cr(VI). The experiments were carried out in batch mode to optimize various influencing parameters, namely, contact time, pH, other interfering co-ions, and temperature. The chromium removal capacity (CRC) of AN/DVB/VBC–ED resin was found to be higher than those of the other prepared copolymers. The mechanism of chromium removal was governed by electrostatic-adsorption-coupled reduction and complexation. The polymeric resins and chromium-sorbed resins were characterized by FTIR, SEM–EDAX, BET, elemental analysis, and EPR studies. The adsorption data were fitted with Freundlich and Langmuir isotherms. The calculated values of thermodynamic parameters indicated the nature of chromium sorption. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3000503 [article] Synthesis and characterization of a few amino - functionalized copolymeric resins and their environmental applications [texte imprimé] / Muniyappan Rajiv Gandhi, Auteur ; Natrayasamy Viswanathan, Auteur ; Sankaran Meenakshi, Auteur . - 2012 . - pp. 5677–5684. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 16 (Avril 2012) . - pp. 5677–5684 Mots-clés : Polymeric resins Adsorption Résumé : The synthetic copolymeric resins acrylonitrile/divinylbenzene/vinylbenzyl chloride (AN/DVB/VBC), styrene/divinylbenzene/vinylbenzyl chloride (ST/DVB/VBC), and vinylbenzyl chloride/divinylbenzene (VBC/DVB) have been prepared by suspension polymerization. These polymeric matrixes were aminated with ethylenediamine (ED) and then protonated to increase their selectivity toward Cr(VI). The experiments were carried out in batch mode to optimize various influencing parameters, namely, contact time, pH, other interfering co-ions, and temperature. The chromium removal capacity (CRC) of AN/DVB/VBC–ED resin was found to be higher than those of the other prepared copolymers. The mechanism of chromium removal was governed by electrostatic-adsorption-coupled reduction and complexation. The polymeric resins and chromium-sorbed resins were characterized by FTIR, SEM–EDAX, BET, elemental analysis, and EPR studies. The adsorption data were fitted with Freundlich and Langmuir isotherms. The calculated values of thermodynamic parameters indicated the nature of chromium sorption. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3000503

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