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Advanced oxidation and electrooxidation as tertiary treatment techniques to improve the purity of tannery wastewater / P. Vijayalakshmi in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) Titre : Advanced oxidation and electrooxidation as tertiary treatment techniques to improve the purity of tannery wastewater Type de document : texte imprimé Auteurs : P. Vijayalakshmi, Auteur ; G. Bhaskar Raju, Auteur ; A. Gnanamani, Auteur Année de publication : 2011 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Electrooxidation  Tannery  Wastewater Résumé : The option of electro-oxidation and advanced oxidation as tertiary treatment technique for the purification of tannery wastewater was explored. The TOC removal of 85% was achieved by UV/O3/H2O2 process, whereas it is hardly 50% by electr-ooxidation. However the power consumption to remove unit mass of TOC by electro-oxidation process was estimated to be 738 kW h/kg, which is ten times less than that of 7600 kW h/kg, required for advanced oxidation process. The kinetic data indicated that the degradation of organics by electro-oxidation is a current control process. To minimize the power consumption, we attempted a two-stage process involving electro-oxidation in the first stage and advanced oxidation in the second stage. The results indicated that the TOC removal by advanced oxidation became sluggish, when the wastewater was processed initially by electro-oxidation. However, the effluents processed by EO were found to be completely disinfected. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201039z [article] Advanced oxidation and electrooxidation as tertiary treatment techniques to improve the purity of tannery wastewater [texte imprimé] / P. Vijayalakshmi, Auteur ; G. Bhaskar Raju, Auteur ; A. Gnanamani, Auteur . - 2011. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) Mots-clés : Electrooxidation  Tannery  Wastewater Résumé : The option of electro-oxidation and advanced oxidation as tertiary treatment technique for the purification of tannery wastewater was explored. The TOC removal of 85% was achieved by UV/O3/H2O2 process, whereas it is hardly 50% by electr-ooxidation. However the power consumption to remove unit mass of TOC by electro-oxidation process was estimated to be 738 kW h/kg, which is ten times less than that of 7600 kW h/kg, required for advanced oxidation process. The kinetic data indicated that the degradation of organics by electro-oxidation is a current control process. To minimize the power consumption, we attempted a two-stage process involving electro-oxidation in the first stage and advanced oxidation in the second stage. The results indicated that the TOC removal by advanced oxidation became sluggish, when the wastewater was processed initially by electro-oxidation. However, the effluents processed by EO were found to be completely disinfected. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201039z

Anodic degradation of CI reactive blue 221 using graphite and IrO2/TaO2/RuO2 coated titanium electrodes / M. Thalamadai Karuppiah in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2149–2156 Titre : Anodic degradation of CI reactive blue 221 using graphite and IrO2/TaO2/RuO2 coated titanium electrodes Type de document : texte imprimé Auteurs : M. Thalamadai Karuppiah, Auteur ; G. Bhaskar Raju, Auteur Année de publication : 2009 Article en page(s) : p. 2149–2156 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : CI  reactive  blue  Biorecalcitrant  reactive  dye  Coated  titanium  electrodes  Chemical  oxygen  demand  Spectrophotometric  method  Organic  carbon  measurements Résumé : Anodic degradation of the biorecalcitrant reactive dye CI Reactive Blue 221 was investigated using graphite and IrO2/TaO2/RuO2 coated titanium electrodes in a batch reactor setup. The decolorization and mineralization of the dye molecule was monitored by UV−visible spectrophotometric method and chemical oxygen demand (COD) and/or total organic carbon (TOC) measurements, respectively. The effect of different electrolytes and applied current density on the mineralization of CI Reactive Blue 221 in the presence of different electrode materials was studied. Though both the electrode materials were found to be effective for decolorization, complete mineralization of the dye was accomplished in the presence of graphite over a pH range of 6.0−8.0. The efficiency of the electrode material was evaluated in terms of instantaneous current efficiency (ICE), electrochemical oxidizability index (EOI), and specific energy consumption (Esp). The metabolites formed during the degradation reaction were identified using GC-MS, and the degradation pathway was proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801291h [article] Anodic degradation of CI reactive blue 221 using graphite and IrO2/TaO2/RuO2 coated titanium electrodes [texte imprimé] / M. Thalamadai Karuppiah, Auteur ; G. Bhaskar Raju, Auteur . - 2009 . - p. 2149–2156. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2149–2156 Mots-clés : CI  reactive  blue  Biorecalcitrant  reactive  dye  Coated  titanium  electrodes  Chemical  oxygen  demand  Spectrophotometric  method  Organic  carbon  measurements Résumé : Anodic degradation of the biorecalcitrant reactive dye CI Reactive Blue 221 was investigated using graphite and IrO2/TaO2/RuO2 coated titanium electrodes in a batch reactor setup. The decolorization and mineralization of the dye molecule was monitored by UV−visible spectrophotometric method and chemical oxygen demand (COD) and/or total organic carbon (TOC) measurements, respectively. The effect of different electrolytes and applied current density on the mineralization of CI Reactive Blue 221 in the presence of different electrode materials was studied. Though both the electrode materials were found to be effective for decolorization, complete mineralization of the dye was accomplished in the presence of graphite over a pH range of 6.0−8.0. The efficiency of the electrode material was evaluated in terms of instantaneous current efficiency (ICE), electrochemical oxidizability index (EOI), and specific energy consumption (Esp). The metabolites formed during the degradation reaction were identified using GC-MS, and the degradation pathway was proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801291h