Documents disponibles écrits par cet auteur

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

A first report on the selective precipitation of sodium chloride from the evaporated residue of reverse osmosis reject salt generated from the leather industry / R. Boopathy in Industrial & engineering chemistry research, Vol. 51 N° 15 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 15 (Avril 2012) . - pp. 5527–5534 Titre : A first report on the selective precipitation of sodium chloride from the evaporated residue of reverse osmosis reject salt generated from the leather industry Type de document : texte imprimé Auteurs : R. Boopathy, Auteur ; A. Gnanamani, Auteur ; A. B. Mandal, Auteur Année de publication : 2012 Article en page(s) : pp. 5527–5534 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Osmosis  Sodium  chloride Résumé : The reverse osmosis process has been actively implemented in the leather sector for the recovery of water from secondary biologically treated wastewater. The membrane reject stream is evaporated in solar evaporation pan/multiple effect evaporator. The evaporated residue (ER) of the reject stream from reverse osmosis lacks reusable characteristics, owing to a high contamination of inorganic and organic salts. In this investigation, an attempt was made to separate sodium chloride from the saturated solution of ER by the common ion effect in the presence of other inorganic and organic contaminants, using hydrogen chloride gas. The optimized process parameters for the selective precipitation of sodium chloride were as follows: time, 3 min; pH, 8.0; temperature, 40 °C; and concentration of ER, 60% (w/v). The ER and the recovered salts were characterized, using SEM-EDX and XRD. This is probably the first report on the precipitation of sodium chloride from the ER. The cost toward the disposal of this ER was also analyzed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201735s [article] A first report on the selective precipitation of sodium chloride from the evaporated residue of reverse osmosis reject salt generated from the leather industry [texte imprimé] / R. Boopathy, Auteur ; A. Gnanamani, Auteur ; A. B. Mandal, Auteur . - 2012 . - pp. 5527–5534. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 15 (Avril 2012) . - pp. 5527–5534 Mots-clés : Osmosis  Sodium  chloride Résumé : The reverse osmosis process has been actively implemented in the leather sector for the recovery of water from secondary biologically treated wastewater. The membrane reject stream is evaporated in solar evaporation pan/multiple effect evaporator. The evaporated residue (ER) of the reject stream from reverse osmosis lacks reusable characteristics, owing to a high contamination of inorganic and organic salts. In this investigation, an attempt was made to separate sodium chloride from the saturated solution of ER by the common ion effect in the presence of other inorganic and organic contaminants, using hydrogen chloride gas. The optimized process parameters for the selective precipitation of sodium chloride were as follows: time, 3 min; pH, 8.0; temperature, 40 °C; and concentration of ER, 60% (w/v). The ER and the recovered salts were characterized, using SEM-EDX and XRD. This is probably the first report on the precipitation of sodium chloride from the ER. The cost toward the disposal of this ER was also analyzed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201735s