Sodium Dodecylbenzene Sulfonate 수용액의 분해반응에서 초음파 효과

Abstract

The influence of ultrasound frequency, dissolved gases, and initial concentration on the decompositionof sodium dodecylbenzene sulfonate(DBS) aqueous solution was investigated using ultrasound generator with 200 Wultrasound power. The decomposition rates at three frequencies(50, 200, and 600 kHz) examined under argon atmospherewere highest at 200 kHz. The highest observed decomposition rate at 200 kHz occured in the presence of oxygen fol-lowed by air and argon, helium, and nitrogen. The effect of initial concentration of DBS on the ultrasonic decompositionwas decreased with increasing initial cIt appears that the ultrasound frequency, disolved gases, and initial concentration play an important role on the sonolysisof DBS. Sonolysis of DBS mainly take place at the interfacial region of cavitation bubbles by both OH radical attackand pyrolysis to alkyl chain, aromatic ring, and headgroup.