CHARACTERISTICS OF VOLATILE FATTY-ACIDS DEGRADATION IN AQUEOUS-SOLUTION BY THE ACTION OF ULTRASOUND

Citation
Ye. Yoo et al., CHARACTERISTICS OF VOLATILE FATTY-ACIDS DEGRADATION IN AQUEOUS-SOLUTION BY THE ACTION OF ULTRASOUND, Water research, 31(6), 1997, pp. 1532-1535
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering, Civil","Environmental Sciences","Water Resources
Journal title
ISSN journal
0043-1354
Volume
31
Issue
6
Year of publication
1997
Pages
1532 - 1535
Database
ISI
SICI code
0043-1354(1997)31:6<1532:COVFDI>2.0.ZU;2-1
Abstract
Aqueous solutions of volatile fatty acids (VFAs; propionic acid, n-but yric acid and n-valeric acid) with concentrations of about 0.9 mM were exposed to 200 kHz ultrasound with a power of 6.0 W/cm(2) per unit vo lume in a sonochemical reactor under ambient temperature and pressure conditions. The concentration of VFAs decreased with irradiation time, indicating pseudo-first-order kinetics. The rates were in the range 1 3.6-3.5 (x 10(-3)) min(-1) under argon. Saturated gas affected the deg radation rate and the order of the rates was as follows: nitrogen less than or equal to air < argon. Mixing effects (in the presence of othe r VFAs) were found to have little influence upon the degradation of in dividual VFAs. (C) 1997 Elsevier Science Ltd.