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Adsorption Interaction of Tetracyclines with Porous Synthetic Resins / Weiben Yang in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13892–13898 Titre : Adsorption Interaction of Tetracyclines with Porous Synthetic Resins Type de document : texte imprimé Auteurs : Weiben Yang, Auteur ; Fangfang Zheng, Auteur ; Yipin Lu, Auteur Année de publication : 2012 Article en page(s) : pp. 13892–13898 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Adsorption Résumé : The presence of tetracycline antibiotics (TCs) in aquatic environments poses potential risks to human health and ecosystems. In the present study, hypercrosslinked resins MN-200 and NDA-150 and aminated polystyrene resins MN-150 and MN-100 were selected as adsorbents for removing two tetracyclines, TC and oxytetracycline, OTC, from aqueous solutions. Despite the different surface properties and pore structures of the resins, similar patterns of pH-dependent adsorption were observed. The TCs adsorption on the resins exhibited ionic strength dependence, which is consistent with their adsorption mechanism. OTC presented stronger adsorption at pH 2.0 compared with TC; this is ascribed to the enhancement by H-bonding. The proposed mechanisms for TCs adsorption at lower pH are dependent on H-bonding, hydrophobic effect, and π–π electron donor–acceptor (EDA) interaction, whereas those at higher pH are regarded as the coordination of π–π EDA interaction and hydrophobic effect. The findings indicate that the hypercrosslinked resin is a promising adsorbent for the removal of antibiotics from aqueous solutions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202166g [article] Adsorption Interaction of Tetracyclines with Porous Synthetic Resins [texte imprimé] / Weiben Yang, Auteur ; Fangfang Zheng, Auteur ; Yipin Lu, Auteur . - 2012 . - pp. 13892–13898. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13892–13898 Mots-clés : Adsorption Résumé : The presence of tetracycline antibiotics (TCs) in aquatic environments poses potential risks to human health and ecosystems. In the present study, hypercrosslinked resins MN-200 and NDA-150 and aminated polystyrene resins MN-150 and MN-100 were selected as adsorbents for removing two tetracyclines, TC and oxytetracycline, OTC, from aqueous solutions. Despite the different surface properties and pore structures of the resins, similar patterns of pH-dependent adsorption were observed. The TCs adsorption on the resins exhibited ionic strength dependence, which is consistent with their adsorption mechanism. OTC presented stronger adsorption at pH 2.0 compared with TC; this is ascribed to the enhancement by H-bonding. The proposed mechanisms for TCs adsorption at lower pH are dependent on H-bonding, hydrophobic effect, and π–π electron donor–acceptor (EDA) interaction, whereas those at higher pH are regarded as the coordination of π–π EDA interaction and hydrophobic effect. The findings indicate that the hypercrosslinked resin is a promising adsorbent for the removal of antibiotics from aqueous solutions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202166g