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Photocatalytic membrane contactors for water treatment / Izumi Kumakiri in Industrial & engineering chemistry research, Vol. 50 N° 10 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6000–600 Titre : Photocatalytic membrane contactors for water treatment Type de document : texte imprimé Auteurs : Izumi Kumakiri, Auteur ; Spyros Diplas, Auteur ; Christian Simon, Auteur Année de publication : 2011 Article en page(s) : pp. 6000–600 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Water  treatment  Catalytic  membrane Résumé : A three-phase catalytic membrane contactor (CMC) was applied in the photocatalytic degradation of organic substances in water. Particles of commercial TiO2 (P25 and ST01) were deposited on porous ceramic materials. Platinum was deposited onto TiO2 by the photoreduction method. The activity of the photo-CMC was studied with respect to removing from water model contaminants such as formic acid, oxalic acid, and humic acid. The influence of contacting nitrogen and oxygen with water through the membrane on the efficiency of the removal of those contaminants was investigated. The highest degradation rate was observed under UV (black light) irradiation with simultaneous oxygen supply. A combination of Pt with a photocatalyst improved the lifetime of Pt, as the photocatalysis maintains Pt in the metallic state by its reductive action and prevents Pt poisoning due to the generation of reactive oxygen species. No membrane fouling was observed under the conditions studied. The initial catalytic activity was preserved during several months of the tests and several months of storage in air. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102470f [article] Photocatalytic membrane contactors for water treatment [texte imprimé] / Izumi Kumakiri, Auteur ; Spyros Diplas, Auteur ; Christian Simon, Auteur . - 2011 . - pp. 6000–600. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6000–600 Mots-clés : Water  treatment  Catalytic  membrane Résumé : A three-phase catalytic membrane contactor (CMC) was applied in the photocatalytic degradation of organic substances in water. Particles of commercial TiO2 (P25 and ST01) were deposited on porous ceramic materials. Platinum was deposited onto TiO2 by the photoreduction method. The activity of the photo-CMC was studied with respect to removing from water model contaminants such as formic acid, oxalic acid, and humic acid. The influence of contacting nitrogen and oxygen with water through the membrane on the efficiency of the removal of those contaminants was investigated. The highest degradation rate was observed under UV (black light) irradiation with simultaneous oxygen supply. A combination of Pt with a photocatalyst improved the lifetime of Pt, as the photocatalysis maintains Pt in the metallic state by its reductive action and prevents Pt poisoning due to the generation of reactive oxygen species. No membrane fouling was observed under the conditions studied. The initial catalytic activity was preserved during several months of the tests and several months of storage in air. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102470f