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Electrochemical oxidation of refractory organics wastewater and chemical oxygen demand (COD) Removal under Extremely Mild Condition / Bo Wang in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8478–8483 Titre : Electrochemical oxidation of refractory organics wastewater and chemical oxygen demand (COD) Removal under Extremely Mild Condition Type de document : texte imprimé Auteurs : Bo Wang, Auteur ; Xin Chang, Auteur ; Hongzhu Ma, Auteur Année de publication : 2008 Article en page(s) : p. 8478–8483 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Wastewater  causes  Pollution Résumé : Coking wastewater causes severe environmental pollution because of its high concentration of organics and other dangerous chemicals, which makes it difficult to reuse by conventional technologies. In this article, we report an investigation of the electrochemical oxidation of coking wastewater at 298 K and 1 atm in the presence of ozone, where the reaction was assisted by potassium permanganate as the catalyst and kaolin as the carrier. The results showed that the refractory organics in wastewater can be effectively removed by this process, and a chemical oxygen demand (COD) removal efficiency of 92.5% was obtained in 80 min at pH 3. Operating parameters such as the current density, initial pH, and amount of catalyst were investigated. Catalyst lifetime was also tested, and the results showed that catalyst activity still remained even after the catalyst had been used three times. The impact of the treated wastewater on chlorophyll was also investigated, with a steady amount of chlorophyll indicating that the treated wastewater could be applied to irrigation. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800826v [article] Electrochemical oxidation of refractory organics wastewater and chemical oxygen demand (COD) Removal under Extremely Mild Condition [texte imprimé] / Bo Wang, Auteur ; Xin Chang, Auteur ; Hongzhu Ma, Auteur . - 2008 . - p. 8478–8483. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8478–8483 Mots-clés : Wastewater  causes  Pollution Résumé : Coking wastewater causes severe environmental pollution because of its high concentration of organics and other dangerous chemicals, which makes it difficult to reuse by conventional technologies. In this article, we report an investigation of the electrochemical oxidation of coking wastewater at 298 K and 1 atm in the presence of ozone, where the reaction was assisted by potassium permanganate as the catalyst and kaolin as the carrier. The results showed that the refractory organics in wastewater can be effectively removed by this process, and a chemical oxygen demand (COD) removal efficiency of 92.5% was obtained in 80 min at pH 3. Operating parameters such as the current density, initial pH, and amount of catalyst were investigated. Catalyst lifetime was also tested, and the results showed that catalyst activity still remained even after the catalyst had been used three times. The impact of the treated wastewater on chlorophyll was also investigated, with a steady amount of chlorophyll indicating that the treated wastewater could be applied to irrigation. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800826v