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Adsorption and competitive adsorption on zeolites of nitrophenol compounds present in wastewater / Bachar Koubaissy in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9558–9565 Titre : Adsorption and competitive adsorption on zeolites of nitrophenol compounds present in wastewater Type de document : texte imprimé Auteurs : Bachar Koubaissy, Auteur ; Guy Joly, Auteur ; Patrick Magnoux, Auteur Année de publication : 2009 Article en page(s) : p. 9558–9565 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Competitive  adsorption  Zeolites  Nitrophenol  compounds Résumé : This work investigates the removal of various nitrophenolic compounds (ortho-nitrophenol (ONP), para-nitrophenol (PNP), meta-nitrophenol (MNP), and 2,4-dinitrophenol (2,4-DNP)) from aqueous solution using hydrophobic FAU zeolites. The adsorption equilibrium of nitrophenols from aqueous solutions by FAU can be well-described using the Fowler−Guggenheim equation. The relative affinity of nitrophenols toward the FAU is dependent on the pH solution and on the pollutant solubility in water. Their sorption capacity is in the following order: ONP > 2.4-DNP > PNP > MNP. In binary mixtures, the most important parameter that governs the adsorption in zeolites seems to be the solubility of pollutants in water. Thus, the less-soluble compound (in this case, ONP) was adsorbed more easily than the other components present in the binary mixture. Finally, hydrophobic FAU zeolite seems to be an efficient adsorbent; it is able to be easily regenerated under air or by solvent leaching, through retention of these initial adsorption properties. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8001777 [article] Adsorption and competitive adsorption on zeolites of nitrophenol compounds present in wastewater [texte imprimé] / Bachar Koubaissy, Auteur ; Guy Joly, Auteur ; Patrick Magnoux, Auteur . - 2009 . - p. 9558–9565. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9558–9565 Mots-clés : Competitive  adsorption  Zeolites  Nitrophenol  compounds Résumé : This work investigates the removal of various nitrophenolic compounds (ortho-nitrophenol (ONP), para-nitrophenol (PNP), meta-nitrophenol (MNP), and 2,4-dinitrophenol (2,4-DNP)) from aqueous solution using hydrophobic FAU zeolites. The adsorption equilibrium of nitrophenols from aqueous solutions by FAU can be well-described using the Fowler−Guggenheim equation. The relative affinity of nitrophenols toward the FAU is dependent on the pH solution and on the pollutant solubility in water. Their sorption capacity is in the following order: ONP > 2.4-DNP > PNP > MNP. In binary mixtures, the most important parameter that governs the adsorption in zeolites seems to be the solubility of pollutants in water. Thus, the less-soluble compound (in this case, ONP) was adsorbed more easily than the other components present in the binary mixture. Finally, hydrophobic FAU zeolite seems to be an efficient adsorbent; it is able to be easily regenerated under air or by solvent leaching, through retention of these initial adsorption properties. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8001777

Adsorptive removal of aromatic compounds present in wastewater by using dealuminated faujasite zeolite / Bachar Koubaissy in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5705-5713 Titre : Adsorptive removal of aromatic compounds present in wastewater by using dealuminated faujasite zeolite Type de document : texte imprimé Auteurs : Bachar Koubaissy, Auteur ; Guy Joly, Auteur ; Isabelle Batonneau-Gener, Auteur Année de publication : 2011 Article en page(s) : pp. 5705-5713 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Zeolite  Waste  water Résumé : The adsorption of aromatic compounds (nitrophenols, nitroaniline, chlorophenols, chloroanilines) present in wastewater using dealuminated faujasite zeolite has been investigated. The adsorption capacity of faujasite zeolite depends on the pH, (the neutral form of the pollutants is more easily adsorbed into zeolite than the dissociated form), and on the solubility in water of the aromatic compounds. The adsorption capacity for a family of compounds increases with decreasing water solubility. In this study, we have shown that the pollutant acidic character enhances their adsorption into the zeolite. Thus, the changeover ofphenol to aniline decreases the adsorbent-adsorbate interaction, as well as in the substitution of the NO2 group by a Cl group. The adsorption data was analyzed using the Fowler-Guggenheim isotherm. The sorption mechanism of nitrophenol in faujasite zeolite was investigated using Raman spectroscopy and through a thermodesorption kinetic study. The relative affinity of the phenolic compounds toward the surface of the dealuminated faujasite was related to the electron donor-acceptor complex formed between the basic sites on the zeolite (oxygen) and the hydrogens (acidic site) of the aromatic ring and of the phenols and anilines functions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128695 [article] Adsorptive removal of aromatic compounds present in wastewater by using dealuminated faujasite zeolite [texte imprimé] / Bachar Koubaissy, Auteur ; Guy Joly, Auteur ; Isabelle Batonneau-Gener, Auteur . - 2011 . - pp. 5705-5713. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5705-5713 Mots-clés : Zeolite  Waste  water Résumé : The adsorption of aromatic compounds (nitrophenols, nitroaniline, chlorophenols, chloroanilines) present in wastewater using dealuminated faujasite zeolite has been investigated. The adsorption capacity of faujasite zeolite depends on the pH, (the neutral form of the pollutants is more easily adsorbed into zeolite than the dissociated form), and on the solubility in water of the aromatic compounds. The adsorption capacity for a family of compounds increases with decreasing water solubility. In this study, we have shown that the pollutant acidic character enhances their adsorption into the zeolite. Thus, the changeover ofphenol to aniline decreases the adsorbent-adsorbate interaction, as well as in the substitution of the NO2 group by a Cl group. The adsorption data was analyzed using the Fowler-Guggenheim isotherm. The sorption mechanism of nitrophenol in faujasite zeolite was investigated using Raman spectroscopy and through a thermodesorption kinetic study. The relative affinity of the phenolic compounds toward the surface of the dealuminated faujasite was related to the electron donor-acceptor complex formed between the basic sites on the zeolite (oxygen) and the hydrogens (acidic site) of the aromatic ring and of the phenols and anilines functions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128695