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Dye destruction and simultaneous generation of sodium hydroxide using a divided electrochemical reactor / S. Raghu in Industrial & engineering chemistry research, Vol. 47 n°15 (Août 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5277–5283 Titre : Dye destruction and simultaneous generation of sodium hydroxide using a divided electrochemical reactor Type de document : texte imprimé Auteurs : S. Raghu, Auteur ; C. Ahmed Basha, Auteur Année de publication : 2008 Article en page(s) : p. 5277–5283 Note générale : Bibliogr. 5282-5283 Langues : Anglais (eng) Mots-clés : Textile  dye;  Dye  --  Degradation;  Electrochemical  proces Résumé : Textile dye bath effluent contains high concentrations of organic dye, sodium chloride, and other chemicals which inhibit the activity of microorganisms during biological oxidation. Hence high concentrations of organic dye and total dissolved solids have to be removed considerably before biological treatment. In this paper, degradation of dye effluent and simultaneous generation of caustic soda in an electrochemical membrane cell was investigated. Experiments were carried out at different current densities and different flow rates using Ti/RuO2/IrO2 as anode and stainless steel as cathode. In the present study of dye effluent treatment the results showed that the electrochemical process could effectively remove COD and color by anodic oxidation (92.16% and 100%) and concentrate caustic soda from 40 to 210.28 g L−1. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie070675b [article] Dye destruction and simultaneous generation of sodium hydroxide using a divided electrochemical reactor [texte imprimé] / S. Raghu, Auteur ; C. Ahmed Basha, Auteur . - 2008 . - p. 5277–5283. Bibliogr. 5282-5283 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5277–5283 Mots-clés : Textile  dye;  Dye  --  Degradation;  Electrochemical  proces Résumé : Textile dye bath effluent contains high concentrations of organic dye, sodium chloride, and other chemicals which inhibit the activity of microorganisms during biological oxidation. Hence high concentrations of organic dye and total dissolved solids have to be removed considerably before biological treatment. In this paper, degradation of dye effluent and simultaneous generation of caustic soda in an electrochemical membrane cell was investigated. Experiments were carried out at different current densities and different flow rates using Ti/RuO2/IrO2 as anode and stainless steel as cathode. In the present study of dye effluent treatment the results showed that the electrochemical process could effectively remove COD and color by anodic oxidation (92.16% and 100%) and concentrate caustic soda from 40 to 210.28 g L−1. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie070675b

Indirect electrochemical oxidation of p-methoxy-toluene to p-methoxy-benzaldehyde using ceric methanesulphonate / V Devadoss in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4607-4616 Titre : Indirect electrochemical oxidation of p-methoxy-toluene to p-methoxy-benzaldehyde using ceric methanesulphonate : a scale-up study Type de document : texte imprimé Auteurs : V Devadoss, Auteur ; C. Ahmed Basha, Auteur ; K Jayaraman, Auteur Année de publication : 2008 Article en page(s) : p. 4607-4616 Note générale : Bibliogr. p. 4615-4616 Langues : Anglais (eng) Mots-clés : Cerium(IV)  ion;  Indirect  oxidation;  p-methoxy-toluene;  Ceric  methanesulphonate Résumé : Electrochemically produced and regenerated cerium(IV) ions, by Ce3+/Ce4+, are well-known redox mediators and are used particularly as synthesis agents for the indirect oxidation of a side chain methyl group to the aldehyde group in substituted toluene. Detailed studies on indirect electrochemical oxidation of p-methoxy-toluene to p-methoxy-benzaldehyde using ceric methanesulphonate were carried out. Under optimized conditions, the yield achieved was 65-78% for the oxidation with continuous recycling and electrochemical regeneration of ceric was achieved with a current efficiency of 70-85%. Purity of the product was also remaining consistent during recycling. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071427i [article] Indirect electrochemical oxidation of p-methoxy-toluene to p-methoxy-benzaldehyde using ceric methanesulphonate : a scale-up study [texte imprimé] / V Devadoss, Auteur ; C. Ahmed Basha, Auteur ; K Jayaraman, Auteur . - 2008 . - p. 4607-4616. Bibliogr. p. 4615-4616 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4607-4616 Mots-clés : Cerium(IV)  ion;  Indirect  oxidation;  p-methoxy-toluene;  Ceric  methanesulphonate Résumé : Electrochemically produced and regenerated cerium(IV) ions, by Ce3+/Ce4+, are well-known redox mediators and are used particularly as synthesis agents for the indirect oxidation of a side chain methyl group to the aldehyde group in substituted toluene. Detailed studies on indirect electrochemical oxidation of p-methoxy-toluene to p-methoxy-benzaldehyde using ceric methanesulphonate were carried out. Under optimized conditions, the yield achieved was 65-78% for the oxidation with continuous recycling and electrochemical regeneration of ceric was achieved with a current efficiency of 70-85%. Purity of the product was also remaining consistent during recycling. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071427i

Participation of electrochemical steps in treating tannery wastewater / C. Ahmed Basha in Industrial & engineering chemistry research, Vol. 48 N° 22 (Novembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9786–9796 Titre : Participation of electrochemical steps in treating tannery wastewater Type de document : texte imprimé Auteurs : C. Ahmed Basha, Auteur ; P. A. Soloman, Auteur ; M. Velan, Auteur Année de publication : 2010 Article en page(s) : pp. 9786–9796 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Tannery  wastewater  Electrochemically  treatement Résumé : The performance of conventional biological treatment of tannery wastewater can be improved by the application of electrochemical treatment to selected streams. In this study, soak liquor, tanning effluent, and post-tanning effluent were electrochemically treated in batch recirculation mode. The experiments were designed, modeled, and optimized using response surface methodology. Considerable removal of chemical oxygen demand (COD, 94.8%) was achieved by treating the soak liquor in a batch recirculation cell under conditions of a circulation flow of 142.8 L h−1, a current density of 5.8 A dm−2, and a time of 7.05 h. Salt remaining in the treated soak liquor was partly utilized in improving the ionic conductivity of the post-tanning effluent for electrochemical treatment. In a separate treatment, the biodegradability index of the post-tanning effluent was improved from 0.3 to 0.67 under conditions of a circulation flow of 112.5 L h−1, a current density of 2.4 A dm−2, and a time of 2.15 h. Considerable reduction in the requirement of reactor volume or residence time of the existing aerated biological treatment system of the total wastewater stream can be achieved by applying such an electrochemical pretreatment. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900464s [article] Participation of electrochemical steps in treating tannery wastewater [texte imprimé] / C. Ahmed Basha, Auteur ; P. A. Soloman, Auteur ; M. Velan, Auteur . - 2010 . - pp. 9786–9796. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9786–9796 Mots-clés : Tannery  wastewater  Electrochemically  treatement Résumé : The performance of conventional biological treatment of tannery wastewater can be improved by the application of electrochemical treatment to selected streams. In this study, soak liquor, tanning effluent, and post-tanning effluent were electrochemically treated in batch recirculation mode. The experiments were designed, modeled, and optimized using response surface methodology. Considerable removal of chemical oxygen demand (COD, 94.8%) was achieved by treating the soak liquor in a batch recirculation cell under conditions of a circulation flow of 142.8 L h−1, a current density of 5.8 A dm−2, and a time of 7.05 h. Salt remaining in the treated soak liquor was partly utilized in improving the ionic conductivity of the post-tanning effluent for electrochemical treatment. In a separate treatment, the biodegradability index of the post-tanning effluent was improved from 0.3 to 0.67 under conditions of a circulation flow of 112.5 L h−1, a current density of 2.4 A dm−2, and a time of 2.15 h. Considerable reduction in the requirement of reactor volume or residence time of the existing aerated biological treatment system of the total wastewater stream can be achieved by applying such an electrochemical pretreatment. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900464s

Process parameters and kinetics for the electrochemical generation of cerium(IV) methanesulphonate from cerium(III) methanesulphonate / Thasan Raju ; C. Ahmed Basha in Industrial & engineering chemistry research, Vol. 47 n°22 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°22 (Novembre 2008) . - p. 8947–8952 Titre : Process parameters and kinetics for the electrochemical generation of cerium(IV) methanesulphonate from cerium(III) methanesulphonate Type de document : texte imprimé Auteurs : Thasan Raju, Auteur ; C. Ahmed Basha, Auteur Année de publication : 2008 Article en page(s) : p. 8947–8952 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Electrochemical  Cerium(IV)  Methanesulphonate  from  Cerium(III)  Methanesulphonate Résumé : To study and optimize the process parameters such as current density, temperature, concentration of cerium(III) methanesulphonate and methanesulphonic acid, and kinetics for the electrochemical generation of cerium(IV) methanesulphonate in aqueous methane sulfonic acid medium. A 97% current efficiency and conversion was achieved at 5 A/dm2 current density in 0.8 M cerium(III) methanesulphonate with 2 M methanesulphonic acid medium at 50 °C temperature. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701727x [article] Process parameters and kinetics for the electrochemical generation of cerium(IV) methanesulphonate from cerium(III) methanesulphonate [texte imprimé] / Thasan Raju, Auteur ; C. Ahmed Basha, Auteur . - 2008 . - p. 8947–8952. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°22 (Novembre 2008) . - p. 8947–8952 Mots-clés : Electrochemical  Cerium(IV)  Methanesulphonate  from  Cerium(III)  Methanesulphonate Résumé : To study and optimize the process parameters such as current density, temperature, concentration of cerium(III) methanesulphonate and methanesulphonic acid, and kinetics for the electrochemical generation of cerium(IV) methanesulphonate in aqueous methane sulfonic acid medium. A 97% current efficiency and conversion was achieved at 5 A/dm2 current density in 0.8 M cerium(III) methanesulphonate with 2 M methanesulphonic acid medium at 50 °C temperature. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701727x