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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