Documents disponibles écrits par cet auteur

Competition between electrochemical advanced oxidation and electrochemical hypochlorination of sulfamethoxazole at a boron-doped diamond anode / Jordache Boudreau in Industrial & engineering chemistry research, Vol. 49 N° 6 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2537–2542 Titre : Competition between electrochemical advanced oxidation and electrochemical hypochlorination of sulfamethoxazole at a boron-doped diamond anode Type de document : texte imprimé Auteurs : Jordache Boudreau, Auteur ; Dorin Bejan, Auteur ; Shuhuan Li, Auteur Année de publication : 2010 Article en page(s) : pp. 2537–2542 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Electrochemical  Oxidation  Electrochemical  Hypochlorination  Sulfamethoxazole  Boron-Doped  Diamond  Anode  Competition Résumé : Sulfamethoxazole (SMX) was used as a model substrate for electrochemical oxidation at a boron-doped diamond anode in the presence of chloride ion, which is present in many waste streams. In the absence of chloride, oxidation of SMX involves mineralization, an electrochemical advanced oxidation process (EAOP) that is initiated by attack of anode-derived hydroxyl radicals. The rate of disappearance of SMX increased monotonically upon addition of chloride ion but without inhibiting mineralization in the early stages of oxidation. This demonstrated that electrochemical hypochlorination (EH) and EAOP are not mutually exclusive reaction pathways; products of EH can undergo EAOP and vice versa. Persistent chlorinated byproducts were formed in the presence of chloride ion, indicating that chloride is a significant detriment to the success of EAOP. No mineralization was observed upon chemical hypochlorination of SMX with sodium hypochlorite. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900614d [article] Competition between electrochemical advanced oxidation and electrochemical hypochlorination of sulfamethoxazole at a boron-doped diamond anode [texte imprimé] / Jordache Boudreau, Auteur ; Dorin Bejan, Auteur ; Shuhuan Li, Auteur . - 2010 . - pp. 2537–2542. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2537–2542 Mots-clés : Electrochemical  Oxidation  Electrochemical  Hypochlorination  Sulfamethoxazole  Boron-Doped  Diamond  Anode  Competition Résumé : Sulfamethoxazole (SMX) was used as a model substrate for electrochemical oxidation at a boron-doped diamond anode in the presence of chloride ion, which is present in many waste streams. In the absence of chloride, oxidation of SMX involves mineralization, an electrochemical advanced oxidation process (EAOP) that is initiated by attack of anode-derived hydroxyl radicals. The rate of disappearance of SMX increased monotonically upon addition of chloride ion but without inhibiting mineralization in the early stages of oxidation. This demonstrated that electrochemical hypochlorination (EH) and EAOP are not mutually exclusive reaction pathways; products of EH can undergo EAOP and vice versa. Persistent chlorinated byproducts were formed in the presence of chloride ion, indicating that chloride is a significant detriment to the success of EAOP. No mineralization was observed upon chemical hypochlorination of SMX with sodium hypochlorite. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900614d

Electrochemical oxidation of the sulfide ion in synthetic geothermal brines in batch cells using coke electrodes / Keegan Rankin in Industrial & engineering chemistry research, Vol. 49 N° 14 (Juillet 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp. 6261–6266 Titre : Electrochemical oxidation of the sulfide ion in synthetic geothermal brines in batch cells using coke electrodes Type de document : texte imprimé Auteurs : Keegan Rankin, Auteur ; Dorin Bejan, Auteur ; Nigel J. Bunce, Auteur Année de publication : 2010 Article en page(s) : pp. 6261–6266 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Oxidation  Ion  Electrodes Résumé : The oxidation of the sulfide ion occurs efficiently in batch cells at massive coke electrodes. At all currents studied, the products included a low yield of elemental sulfur, which deposited on the anode; the yields of sulfate were also low, except at the highest current. The remaining products were soluble organosulfur species, indicating that the coke anodes acted sacrificially. The reaction displayed unusual kinetic behavior with respect to the disappearance of sulfide: a two-stage reaction was observed in which the loss of sulfide was faster in the early stages of reaction, while elemental sulfur deposited on the anode. A subsequent slower current-controlled reaction was associated with the formation of the remaining products. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901511a [article] Electrochemical oxidation of the sulfide ion in synthetic geothermal brines in batch cells using coke electrodes [texte imprimé] / Keegan Rankin, Auteur ; Dorin Bejan, Auteur ; Nigel J. Bunce, Auteur . - 2010 . - pp. 6261–6266. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp. 6261–6266 Mots-clés : Oxidation  Ion  Electrodes Résumé : The oxidation of the sulfide ion occurs efficiently in batch cells at massive coke electrodes. At all currents studied, the products included a low yield of elemental sulfur, which deposited on the anode; the yields of sulfate were also low, except at the highest current. The remaining products were soluble organosulfur species, indicating that the coke anodes acted sacrificially. The reaction displayed unusual kinetic behavior with respect to the disappearance of sulfide: a two-stage reaction was observed in which the loss of sulfide was faster in the early stages of reaction, while elemental sulfur deposited on the anode. A subsequent slower current-controlled reaction was associated with the formation of the remaining products. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901511a