Thermodynamic analysis on the mineralization of trace organic contaminants with oxidants in advanced oxidation processes / Yuanhui Ji in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10728–10733 Titre : Thermodynamic analysis on the mineralization of trace organic contaminants with oxidants in advanced oxidation processes Type de document : texte imprimé Auteurs : Yuanhui Ji, Auteur ; Zhuhong Yang, Auteur ; Xiaoyan Ji, Auteur Année de publication : 2010 Article en page(s) : pp. 10728–10733 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Thermodynamic--Analysis--Mineralization--Trace Organic--Contaminants--Oxidants--Advanced--Oxidation--Processes Résumé : There is a growing demand for the efficient treatment of organic polluted wastewaters by advanced oxidation processes (AOPs) which calls for the determination of the mineralization order of ease for the organic contaminants with oxidants. The mineralization abilities of organic contaminants in AOPs are investigated in this work. Photocatalytic experiments for three representative organic contaminants are carried out, and their corresponding reaction rates are determined experimentally. Meanwhile, molar Gibbs free energy changes ΔrGm° for the reactions of 31 organic contaminants (10 chlorinated hydrocarbons, four brominated hydrocarbons, 11 aromatic hydrocarbons and their derivatives, three chloroacetic acid, and three chloroacetyl chloride) with oxidants of •OH, H2O2, •O−, O3, and O2 are calculated, and the mineralization order of ease is determined theoretically on the basis of ΔrGm°. The agreement of the theoretical and experimental mineralization abilities for most of the organic contaminants investigated implies the reliability of the determination of the mineralization ability from the magnitude of ΔrGm° for the mineralization of trace organic contaminants. Results also show that for most of the organic contaminants studied, the mineralization abilities are •OH > H2O2 > •O− > O3 > O2, and the mineralization ability of the organic contaminants depends on not only the oxidants but also the structure and properties of the organic contaminants themselves, and the degradation reaction products. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900620n [article] Thermodynamic analysis on the mineralization of trace organic contaminants with oxidants in advanced oxidation processes [texte imprimé] / Yuanhui Ji, Auteur ; Zhuhong Yang, Auteur ; Xiaoyan Ji, Auteur . - 2010 . - pp. 10728–10733. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10728–10733 Mots-clés : Thermodynamic--Analysis--Mineralization--Trace Organic--Contaminants--Oxidants--Advanced--Oxidation--Processes Résumé : There is a growing demand for the efficient treatment of organic polluted wastewaters by advanced oxidation processes (AOPs) which calls for the determination of the mineralization order of ease for the organic contaminants with oxidants. The mineralization abilities of organic contaminants in AOPs are investigated in this work. Photocatalytic experiments for three representative organic contaminants are carried out, and their corresponding reaction rates are determined experimentally. Meanwhile, molar Gibbs free energy changes ΔrGm° for the reactions of 31 organic contaminants (10 chlorinated hydrocarbons, four brominated hydrocarbons, 11 aromatic hydrocarbons and their derivatives, three chloroacetic acid, and three chloroacetyl chloride) with oxidants of •OH, H2O2, •O−, O3, and O2 are calculated, and the mineralization order of ease is determined theoretically on the basis of ΔrGm°. The agreement of the theoretical and experimental mineralization abilities for most of the organic contaminants investigated implies the reliability of the determination of the mineralization ability from the magnitude of ΔrGm° for the mineralization of trace organic contaminants. Results also show that for most of the organic contaminants studied, the mineralization abilities are •OH > H2O2 > •O− > O3 > O2, and the mineralization ability of the organic contaminants depends on not only the oxidants but also the structure and properties of the organic contaminants themselves, and the degradation reaction products. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900620n

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