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Magnetic polyacrylic anion exchange resin / Chendong Shuang in Industrial & engineering chemistry research, Vol. 51 N° 11 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 11 (Mars 2012) . - pp. 4380–4387 Titre : Magnetic polyacrylic anion exchange resin : Preparation, characterization and adsorption behavior of humic acid Type de document : texte imprimé Auteurs : Chendong Shuang, Auteur ; Fei Pan, Auteur ; Qing Zhou, Auteur Année de publication : 2012 Article en page(s) : pp. 4380–4387 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Organic  matter  Adsorption  Preparation  Anionic  resin Résumé : Magnetic polyacrylic resin (R0) was prepared by suspension polymerization in the presence of γ-Fe2O3 and γ-methacryloxypropyltrimethoxysilane (γ-MPS). The obtained magnetic resin (R0) was modified sequentially by ammonolysis and alkylation to produce a magnetic weakly basic anion exchange resin (R1) and a magnetic strongly basic anion exchange resin (R2). Infrared (IR) spectra, elemental analysis, scanning electron microscopy (SEM), magnetization, Brunauer–Emmett–Teller (BET) surface area and chemical analysis were all determined to characterize these resins. The investigation of humic acid (HA) adsorption on R0, R1, and R2 showed that chemical interactions between the functional groups of the resin and HA were responsible for HA adsorption. The adsorption capacity of HA on R1 was 20%–60% less than that of R2, but the R1 resin was easier to regenerate with NaOH aqueous solution. A mixture of 1% NaCl and 1% NaOH was found to be highly efficient for the regeneration of both R1 and R2 resins, with desorption efficiencies measuring >90%. Pseudo-second-order model and Freundlich equation fit better for HA adsorption onto R1 and R2 than other typical kinetic and thermodynamic models, respectively. The effects of pH, coexisting salts (i.e., NaCl and Na2SO4), and recyclability were also assessed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25655645 [article] Magnetic polyacrylic anion exchange resin : Preparation, characterization and adsorption behavior of humic acid [texte imprimé] / Chendong Shuang, Auteur ; Fei Pan, Auteur ; Qing Zhou, Auteur . - 2012 . - pp. 4380–4387. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 11 (Mars 2012) . - pp. 4380–4387 Mots-clés : Organic  matter  Adsorption  Preparation  Anionic  resin Résumé : Magnetic polyacrylic resin (R0) was prepared by suspension polymerization in the presence of γ-Fe2O3 and γ-methacryloxypropyltrimethoxysilane (γ-MPS). The obtained magnetic resin (R0) was modified sequentially by ammonolysis and alkylation to produce a magnetic weakly basic anion exchange resin (R1) and a magnetic strongly basic anion exchange resin (R2). Infrared (IR) spectra, elemental analysis, scanning electron microscopy (SEM), magnetization, Brunauer–Emmett–Teller (BET) surface area and chemical analysis were all determined to characterize these resins. The investigation of humic acid (HA) adsorption on R0, R1, and R2 showed that chemical interactions between the functional groups of the resin and HA were responsible for HA adsorption. The adsorption capacity of HA on R1 was 20%–60% less than that of R2, but the R1 resin was easier to regenerate with NaOH aqueous solution. A mixture of 1% NaCl and 1% NaOH was found to be highly efficient for the regeneration of both R1 and R2 resins, with desorption efficiencies measuring >90%. Pseudo-second-order model and Freundlich equation fit better for HA adsorption onto R1 and R2 than other typical kinetic and thermodynamic models, respectively. The effects of pH, coexisting salts (i.e., NaCl and Na2SO4), and recyclability were also assessed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25655645