Documents disponibles écrits par cet auteur

Attenuation of UV Light in Large-Scale Sonophotocatalytic Reactors / Younggyu Son in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 232-239 Titre : Attenuation of UV Light in Large-Scale Sonophotocatalytic Reactors : The Effects of Ultrasound Irradiation and TiO2 Concentration Type de document : texte imprimé Auteurs : Younggyu Son, Auteur ; Myunghee Lim, Auteur ; Jeehyeong Khim, Auteur Année de publication : 2012 Article en page(s) : pp. 232-239 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Titanium  oxide  Ultrasound  Reactor  Ultraviolet  radiation  Selfpurification Résumé : The photocatalytic process is considered as one of the advanced oxidation processes (AOPs) for the degradation/ mineralization of pollutants, and it is known that ultrasound can significantly enhance these reactions when combined with photocatalytic processes. However little is known about the design parameters of these AOPs for industrial use. In this study, the attenuation of UV light under various conditions including ultrasound irradiation (36 and 935 kHz) and photocatalytic particle concentrations (TiO2: 0 to 100 mg/L) was investigated in a large-scale reactor. In addition, hydroxyl radical-induced oxidation in each process was compared using KI dosimetry. It was found that UV light was attenuated significantly due to the presence of dispersed particles and ultrasonic waves. The effective irradiation radius of UV light using a commercial module was determined to be with less than 10 cm considering the hydroxyl radical-induced activity in the combined processes. The results from this study may be useful to design large-scale UV-light-based AOPs for the removal of organic contaminants from an aqueous environment. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476466 [article] Attenuation of UV Light in Large-Scale Sonophotocatalytic Reactors : The Effects of Ultrasound Irradiation and TiO2 Concentration [texte imprimé] / Younggyu Son, Auteur ; Myunghee Lim, Auteur ; Jeehyeong Khim, Auteur . - 2012 . - pp. 232-239. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 232-239 Mots-clés : Titanium  oxide  Ultrasound  Reactor  Ultraviolet  radiation  Selfpurification Résumé : The photocatalytic process is considered as one of the advanced oxidation processes (AOPs) for the degradation/ mineralization of pollutants, and it is known that ultrasound can significantly enhance these reactions when combined with photocatalytic processes. However little is known about the design parameters of these AOPs for industrial use. In this study, the attenuation of UV light under various conditions including ultrasound irradiation (36 and 935 kHz) and photocatalytic particle concentrations (TiO2: 0 to 100 mg/L) was investigated in a large-scale reactor. In addition, hydroxyl radical-induced oxidation in each process was compared using KI dosimetry. It was found that UV light was attenuated significantly due to the presence of dispersed particles and ultrasonic waves. The effective irradiation radius of UV light using a commercial module was determined to be with less than 10 cm considering the hydroxyl radical-induced activity in the combined processes. The results from this study may be useful to design large-scale UV-light-based AOPs for the removal of organic contaminants from an aqueous environment. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476466