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Dependence of sulfadiazine oxidative degradation on physicochemical properties of manganese dioxides / Chengshuai Liu in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10408–10413 Titre : Dependence of sulfadiazine oxidative degradation on physicochemical properties of manganese dioxides Type de document : texte imprimé Auteurs : Chengshuai Liu, Auteur ; Lijia Zhang, Auteur ; Fangbai Li, Auteur Année de publication : 2010 Article en page(s) : pp. 10408–10413 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Dependence--Sulfadiazine--Oxidative--Degradation--Physicochemical--Properties--Manganese--Dioxides Résumé : Manganese dioxides as active oxidants are the common minerals in environment, and different types of manganese dioxides may exhibit varied oxidative activity. In this study, eight manganese dioxides were used to conduct sulfadiazine (SD) oxidative degradation. SD can be oxidatively degraded and even mineralized by these manganese dioxides, and the toxicity of the SD sample can also be reduced significantly. The experiments in this study demonstrated that the kinetic reaction rate constant k values of SD degradation strongly depended on the physicochemical properties of different manganese dioxides, including average oxidation state (AOS), reductive potential (Eh), pH at the point of zero charge (pHPZC), and apparent activation energy (Ea). The k values were positively correlated with the AOS and Eh, while negatively correlated with pHPZC and Ea. The values of these physicochemical properties can be used to quantitatively estimate the oxidative activity of a manganese dioxide to some extent for better understanding of the degradation of organic pollutants with manganese dioxides. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900812j [article] Dependence of sulfadiazine oxidative degradation on physicochemical properties of manganese dioxides [texte imprimé] / Chengshuai Liu, Auteur ; Lijia Zhang, Auteur ; Fangbai Li, Auteur . - 2010 . - pp. 10408–10413. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10408–10413 Mots-clés : Dependence--Sulfadiazine--Oxidative--Degradation--Physicochemical--Properties--Manganese--Dioxides Résumé : Manganese dioxides as active oxidants are the common minerals in environment, and different types of manganese dioxides may exhibit varied oxidative activity. In this study, eight manganese dioxides were used to conduct sulfadiazine (SD) oxidative degradation. SD can be oxidatively degraded and even mineralized by these manganese dioxides, and the toxicity of the SD sample can also be reduced significantly. The experiments in this study demonstrated that the kinetic reaction rate constant k values of SD degradation strongly depended on the physicochemical properties of different manganese dioxides, including average oxidation state (AOS), reductive potential (Eh), pH at the point of zero charge (pHPZC), and apparent activation energy (Ea). The k values were positively correlated with the AOS and Eh, while negatively correlated with pHPZC and Ea. The values of these physicochemical properties can be used to quantitatively estimate the oxidative activity of a manganese dioxide to some extent for better understanding of the degradation of organic pollutants with manganese dioxides. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900812j