Adsorption of aqueous Cr(VI) by novel fibrous adsorbent with amino and quaternary ammonium groups / Jing Wang in Industrial & engineering chemistry research, Vol. 51 N° 42 (Octobre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13655-13662 Titre : Adsorption of aqueous Cr(VI) by novel fibrous adsorbent with amino and quaternary ammonium groups Type de document : texte imprimé Auteurs : Jing Wang, Auteur ; Liang Zhao, Auteur ; Wenjie Duan, Auteur Année de publication : 2012 Article en page(s) : pp. 13655-13662 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Adsorption Résumé : A novel fibrous adsorbent functionalized with both amino and quaternary ammonium groups (QAPAN) was prepared through a simple two-step route (i.e., amination followed by quaternization reactions) for removing aqueous Cr(VI) through batch and column experiments. As compared with traditional adsorbents, the QAPAN had an extremely fast adsorption kinetic (equilibrium achieved within 10 min) and an exceptionally high adsorption capacity (Qm = 248 mg/g). The QAPAN worked well even in strong basic conditions, and ionic strength and coexisting anions had minor inhibitory effects on the adsorption. Besides, the QAPAN could be repeatedly used for Cr(VI) adsorption with no obvious decrease of uptake after regeneration with 0.1 mol/L NaOH. By analyzing FTIR and XPS spectra, an electrostatic interaction mechanism between Cr(VI) oxyanions and the surface amino and quaternary ammonium groups was proposed. Findings of the current study provided a novel material and technology for treatment of Cr(VI) contaminated waters. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26508190 [article] Adsorption of aqueous Cr(VI) by novel fibrous adsorbent with amino and quaternary ammonium groups [texte imprimé] / Jing Wang, Auteur ; Liang Zhao, Auteur ; Wenjie Duan, Auteur . - 2012 . - pp. 13655-13662. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13655-13662 Mots-clés : Adsorption Résumé : A novel fibrous adsorbent functionalized with both amino and quaternary ammonium groups (QAPAN) was prepared through a simple two-step route (i.e., amination followed by quaternization reactions) for removing aqueous Cr(VI) through batch and column experiments. As compared with traditional adsorbents, the QAPAN had an extremely fast adsorption kinetic (equilibrium achieved within 10 min) and an exceptionally high adsorption capacity (Qm = 248 mg/g). The QAPAN worked well even in strong basic conditions, and ionic strength and coexisting anions had minor inhibitory effects on the adsorption. Besides, the QAPAN could be repeatedly used for Cr(VI) adsorption with no obvious decrease of uptake after regeneration with 0.1 mol/L NaOH. By analyzing FTIR and XPS spectra, an electrostatic interaction mechanism between Cr(VI) oxyanions and the surface amino and quaternary ammonium groups was proposed. Findings of the current study provided a novel material and technology for treatment of Cr(VI) contaminated waters. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26508190

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