Conductive - diamond electrochemical oxidation of surfactant - aided soil - washing effluents / Cristina Saez in Industrial & engineering chemistry research, Vol. 49 N° 20 (Octobre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9631–9635 Titre : Conductive - diamond electrochemical oxidation of surfactant - aided soil - washing effluents Type de document : texte imprimé Auteurs : Cristina Saez, Auteur ; Ruben Lopez-Vizcaino, Auteur ; Pablo Canizares, Auteur Année de publication : 2011 Article en page(s) : pp. 9631–9635 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Electrochemical Oxidation Résumé : Washing of soils polluted with polycyclic aromatic hydrocarbons (PAHs) using surfactant is a widely used technique. Once the pollutant is transferred to the washing solution, the polluted wastewater has to be treated. In this work, the feasibility of conductive-diamond electrochemical oxidation (CDEO) to treat wastewater polluted with phenanthrene (selected as model PAHs) and three different surfactants (anionic, cationic, and nonionic), which were tested as the washing solution, has been studied. The results show that CDEO enables a significant reduction in the organic load of the wastes regardless of the surfactant present. However, the process efficiency is largely influenced by the type of surfactant employed. Thus, aliphatic linear-chain species seem to lead to the formation of oxidation-refractory compounds, whereas molecules with an aromatic structure favor the formation of insoluble species. The observed changes in pH and conductivity seem to confirm this assumption. In contrast, dimensionally stable anode technology is ineffective in the treatment of these effluents. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101224t [article] Conductive - diamond electrochemical oxidation of surfactant - aided soil - washing effluents [texte imprimé] / Cristina Saez, Auteur ; Ruben Lopez-Vizcaino, Auteur ; Pablo Canizares, Auteur . - 2011 . - pp. 9631–9635. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9631–9635 Mots-clés : Electrochemical Oxidation Résumé : Washing of soils polluted with polycyclic aromatic hydrocarbons (PAHs) using surfactant is a widely used technique. Once the pollutant is transferred to the washing solution, the polluted wastewater has to be treated. In this work, the feasibility of conductive-diamond electrochemical oxidation (CDEO) to treat wastewater polluted with phenanthrene (selected as model PAHs) and three different surfactants (anionic, cationic, and nonionic), which were tested as the washing solution, has been studied. The results show that CDEO enables a significant reduction in the organic load of the wastes regardless of the surfactant present. However, the process efficiency is largely influenced by the type of surfactant employed. Thus, aliphatic linear-chain species seem to lead to the formation of oxidation-refractory compounds, whereas molecules with an aromatic structure favor the formation of insoluble species. The observed changes in pH and conductivity seem to confirm this assumption. In contrast, dimensionally stable anode technology is ineffective in the treatment of these effluents. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101224t

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Improvements in the electrochemical production of ferrates with conductive diamond anodes using goethite as raw material and ultrasound / Ana Sanchez-Carretero in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp. 7073-7076 Titre : Improvements in the electrochemical production of ferrates with conductive diamond anodes using goethite as raw material and ultrasound Type de document : texte imprimé Auteurs : Ana Sanchez-Carretero, Auteur ; Cristina Saez, Auteur ; Pablo Canizares, Auteur Année de publication : 2011 Article en page(s) : pp. 7073-7076 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ultrasound Raw materials Production Résumé : The improvement in the electrochemical production of ferrates with conductive diamond anodes using goethite as raw material and ultrasounds has been studied. The conductive-diamond electrolysis of suspensions of goethite leads to a higher ferrate concentration than that of Fe(OH)3 suspensions and of iron-powder bed. With this raw material, the ferrate concentration increases continuously with a constant production rate, after a first more efficient stage in which results are similar to the other two raw materials. In addition, the ferrate production rate is significantly improved in the sonoelectrochemical system, suggesting that the amount of soluble iron ready to be oxidized to ferrates increases with the ultrasound effect The initial iron concentration only seems to have an influence on the first stage of the process. On the other hand, the concentration of ferrate strongly depends on the hydroxide anion concentration: the higher is the hydroxide concentration, the higher the ferrate concentration is. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24199926 [article] Improvements in the electrochemical production of ferrates with conductive diamond anodes using goethite as raw material and ultrasound [texte imprimé] / Ana Sanchez-Carretero, Auteur ; Cristina Saez, Auteur ; Pablo Canizares, Auteur . - 2011 . - pp. 7073-7076. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp. 7073-7076 Mots-clés : Ultrasound Raw materials Production Résumé : The improvement in the electrochemical production of ferrates with conductive diamond anodes using goethite as raw material and ultrasounds has been studied. The conductive-diamond electrolysis of suspensions of goethite leads to a higher ferrate concentration than that of Fe(OH)3 suspensions and of iron-powder bed. With this raw material, the ferrate concentration increases continuously with a constant production rate, after a first more efficient stage in which results are similar to the other two raw materials. In addition, the ferrate production rate is significantly improved in the sonoelectrochemical system, suggesting that the amount of soluble iron ready to be oxidized to ferrates increases with the ultrasound effect The initial iron concentration only seems to have an influence on the first stage of the process. On the other hand, the concentration of ferrate strongly depends on the hydroxide anion concentration: the higher is the hydroxide concentration, the higher the ferrate concentration is. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24199926

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