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Effective adsorption of anionic dye, alizarin red S, from aqueous solutions on activated clay modified by iron oxide / Feng Fu in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9712–9717 Titre : Effective adsorption of anionic dye, alizarin red S, from aqueous solutions on activated clay modified by iron oxide Type de document : texte imprimé Auteurs : Feng Fu, Auteur ; Ziwei Gao, Auteur ; Lingxiang Gao, Auteur Année de publication : 2011 Article en page(s) : pp. 9712–9717 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Aqueous  solution  Dyes  Adsorption Résumé : The present study aims to investigate the adsorption of anionic dye, alizarin red s (ARS), on activated clay modified by iron oxide (Fe-clay) in a batch reactor. The adsorption process reached equilibrium within 90 min, and the removal efficiency increased with the enhancement of initial dye concentration, adsorbent dosage, and contact time, but decreased with the enhancement of solution pH. The adsorption kinetics was investigated according to three theoretical models, but the best fit was achieved by the pseudosecond-order kinetics model. The adsorption isotherms could be well-defined with the Langmuir isotherm model instead of the Freundlich isotherm model, and the calculated maximum adsorption capacity was found to be 32.7 mg g–1. The obtained results indicate that Fe-clay is suitable for adsorption of ARS from aqueous solutions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425215 [article] Effective adsorption of anionic dye, alizarin red S, from aqueous solutions on activated clay modified by iron oxide [texte imprimé] / Feng Fu, Auteur ; Ziwei Gao, Auteur ; Lingxiang Gao, Auteur . - 2011 . - pp. 9712–9717. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9712–9717 Mots-clés : Aqueous  solution  Dyes  Adsorption Résumé : The present study aims to investigate the adsorption of anionic dye, alizarin red s (ARS), on activated clay modified by iron oxide (Fe-clay) in a batch reactor. The adsorption process reached equilibrium within 90 min, and the removal efficiency increased with the enhancement of initial dye concentration, adsorbent dosage, and contact time, but decreased with the enhancement of solution pH. The adsorption kinetics was investigated according to three theoretical models, but the best fit was achieved by the pseudosecond-order kinetics model. The adsorption isotherms could be well-defined with the Langmuir isotherm model instead of the Freundlich isotherm model, and the calculated maximum adsorption capacity was found to be 32.7 mg g–1. The obtained results indicate that Fe-clay is suitable for adsorption of ARS from aqueous solutions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425215