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Preparation of novel emulsion gel adsorbents and their adsorption properties for heavy-metal ions / Hideaki Tokuyama in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10270-10277 Titre : Preparation of novel emulsion gel adsorbents and their adsorption properties for heavy-metal ions Type de document : texte imprimé Auteurs : Hideaki Tokuyama, Auteur ; Takuro Yoshida, Auteur ; Liangliang He, Auteur Année de publication : 2011 Article en page(s) : pp. 10270-10277 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Metal  ion  Heavy  metal  Adsorption  Emulsion  Preparation Résumé : Novel emulsion gel adsorbents were developed for metal adsorption. Poly[poly(ethylene glycol) methyl ether acrylate] [poly(PEGMEA)] was used as a nonionic hydrophilic polymer, and 2-ethylhexylphosphoric acid mono-2-ethylhexyl ether (EHPNA) was used as an organophosphorus extractant for rare metal ions. Poly(PEGMEA) hydrogel containing randomly distributed oil microdroplets of EHPNA were prepared by the emulsion-gelation method using oil-in-water emulsions under various monomer concentrations, oil volume fractions, and surfactant concentrations. The emulsion gel successfully adsorbed In(III) ions used as a representative metal. Mutual separation of In(III) and Zn(II) ions and repeated adsorption were successful because of the pH dependence of the metal-extractant complexation. The emulsion gel has a higher degree of compressive deformation and abrasion resistance than a conventional (nonemulsion) hydrogel and shows potential for use in practical separations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483671 [article] Preparation of novel emulsion gel adsorbents and their adsorption properties for heavy-metal ions [texte imprimé] / Hideaki Tokuyama, Auteur ; Takuro Yoshida, Auteur ; Liangliang He, Auteur . - 2011 . - pp. 10270-10277. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10270-10277 Mots-clés : Metal  ion  Heavy  metal  Adsorption  Emulsion  Preparation Résumé : Novel emulsion gel adsorbents were developed for metal adsorption. Poly[poly(ethylene glycol) methyl ether acrylate] [poly(PEGMEA)] was used as a nonionic hydrophilic polymer, and 2-ethylhexylphosphoric acid mono-2-ethylhexyl ether (EHPNA) was used as an organophosphorus extractant for rare metal ions. Poly(PEGMEA) hydrogel containing randomly distributed oil microdroplets of EHPNA were prepared by the emulsion-gelation method using oil-in-water emulsions under various monomer concentrations, oil volume fractions, and surfactant concentrations. The emulsion gel successfully adsorbed In(III) ions used as a representative metal. Mutual separation of In(III) and Zn(II) ions and repeated adsorption were successful because of the pH dependence of the metal-extractant complexation. The emulsion gel has a higher degree of compressive deformation and abrasion resistance than a conventional (nonemulsion) hydrogel and shows potential for use in practical separations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483671