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Degradation of aqueous p-nitrophenol by ozonation integrated with activated carbon / Li Gu in Industrial & engineering chemistry research, Vol. 47 N°18 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6809–6815 Titre : Degradation of aqueous p-nitrophenol by ozonation integrated with activated carbon Type de document : texte imprimé Auteurs : Li Gu, Auteur ; Xingwang Zhang, Auteur ; Lecheng Lei, Auteur Année de publication : 2008 Article en page(s) : p. 6809–6815 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Aqueous  p-nitrophenol--degradation  Granular  activated  carbon Résumé : Degradation of aqueous p-nitrophenol (PNP) by ozonation integrated with granular activated carbon (GAC) was investigated. In the integrated process, organics were removed by the joint effect of oxidation and adsorption, and the removal was considerably enhanced. Operation parameters including pH value and ozone dosage were optimized, and pH was found to be the primary factor in the integrated process. Intermediates in PNP oxidation, including aromatic compounds and low-mass acids, were identified, and possible pathways of PNP degradation were introduced. The reaction mechanism was explored using radical scavenger to suspend the oxidation effect of radicals. The results indicated that the adsorption effect predominated in organics removal at acidic conditions while catalytic oxidation contributed primarily at basic conditions. In addition, the integrated process was successfully applied to treat a high concentrated real wastewater, showing that the integrated process would have great potential in practical application. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071584h [article] Degradation of aqueous p-nitrophenol by ozonation integrated with activated carbon [texte imprimé] / Li Gu, Auteur ; Xingwang Zhang, Auteur ; Lecheng Lei, Auteur . - 2008 . - p. 6809–6815. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6809–6815 Mots-clés : Aqueous  p-nitrophenol--degradation  Granular  activated  carbon Résumé : Degradation of aqueous p-nitrophenol (PNP) by ozonation integrated with granular activated carbon (GAC) was investigated. In the integrated process, organics were removed by the joint effect of oxidation and adsorption, and the removal was considerably enhanced. Operation parameters including pH value and ozone dosage were optimized, and pH was found to be the primary factor in the integrated process. Intermediates in PNP oxidation, including aromatic compounds and low-mass acids, were identified, and possible pathways of PNP degradation were introduced. The reaction mechanism was explored using radical scavenger to suspend the oxidation effect of radicals. The results indicated that the adsorption effect predominated in organics removal at acidic conditions while catalytic oxidation contributed primarily at basic conditions. In addition, the integrated process was successfully applied to treat a high concentrated real wastewater, showing that the integrated process would have great potential in practical application. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071584h