Documents disponibles écrits par cet auteur

Effect of bulk temperature and frequency on the sonolytic degradation of 1,4-dioxane with Fe0 / Hyun-Seok Son in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5394–5400 Titre : Effect of bulk temperature and frequency on the sonolytic degradation of 1,4-dioxane with Fe0 Type de document : texte imprimé Auteurs : Hyun-Seok Son, Auteur ; Sung-Keun Kim, Auteur ; Jong-Kwon Im, Auteur Année de publication : 2011 Article en page(s) : pp. 5394–5400 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Sonolytic  degradation Résumé : The sonolysis of 1,4-dioxane in the absence and the presence of zero-valent iron (Fe0) was investigated by altering bulk temperature and ultrasonic frequency conditions. In the absence of Fe0, the sonolytic degradation efficiency of 1,4-dioxane was higher at 170 kHz as compared to that at 35 kHz. As bulk temperature increased, sononlytic degradation efficiency of 1,4-dioxane decreased at both frequencies; however, the rate decrease by the increase in temperature was smaller at 170 kHz than at 35 kHz. Adding methanol as a radical scavenger remarkably decreased the sonolytic degradation rate at 170 kHz within 60 min in all bulk temperatures. In contrast, the decrease in the degradation rate by adding methanol at 35 kHz was observed after 60 min only at 10 °C, but not at 20 and 30 °C. These results indicate that both bulk temperature and sonication frequency should be considered to optimize the sonolytic degradation. The degradation efficiency was significantly enhanced in the presence of Fe0 especially at 170 kHz, indicating that Fe0 can facilitate hydroxyl radical production by Fenton-type reaction mechanism during sonication. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101849p [article] Effect of bulk temperature and frequency on the sonolytic degradation of 1,4-dioxane with Fe0 [texte imprimé] / Hyun-Seok Son, Auteur ; Sung-Keun Kim, Auteur ; Jong-Kwon Im, Auteur . - 2011 . - pp. 5394–5400. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5394–5400 Mots-clés : Sonolytic  degradation Résumé : The sonolysis of 1,4-dioxane in the absence and the presence of zero-valent iron (Fe0) was investigated by altering bulk temperature and ultrasonic frequency conditions. In the absence of Fe0, the sonolytic degradation efficiency of 1,4-dioxane was higher at 170 kHz as compared to that at 35 kHz. As bulk temperature increased, sononlytic degradation efficiency of 1,4-dioxane decreased at both frequencies; however, the rate decrease by the increase in temperature was smaller at 170 kHz than at 35 kHz. Adding methanol as a radical scavenger remarkably decreased the sonolytic degradation rate at 170 kHz within 60 min in all bulk temperatures. In contrast, the decrease in the degradation rate by adding methanol at 35 kHz was observed after 60 min only at 10 °C, but not at 20 and 30 °C. These results indicate that both bulk temperature and sonication frequency should be considered to optimize the sonolytic degradation. The degradation efficiency was significantly enhanced in the presence of Fe0 especially at 170 kHz, indicating that Fe0 can facilitate hydroxyl radical production by Fenton-type reaction mechanism during sonication. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101849p