关键词:

超声波/过氧化氢, 苯酚, 协同效应, 动力学

Abstract: Though the ultrasonic/H₂O₂ process shows potential application for wastewater treatment, there were only a few reports on degradation kinetics. In this paper, the synergetic kinetics of phenol degradation in water by using ultrasonic/H₂O₂ system was studied. It was found that phenol degradation followed pseudo-first order reaction under individual ultrasonic radiation or H₂O₂ process, while it was significantly enhanced in the combined ultrasonic/H₂O₂ system. This indicated that there exist synergetic effects in the ultrasonic/H₂O₂ process and it was found that the enhancement factor for phenol degradation rate constant was about 6.904. A simplified mechanistic model for phenol degradation was derived by accounting for the contribution of individual ultrasonic radiation, H₂O₂ oxidation and hydroxyl radical in the combined ultrasonic/H₂O₂ system. The model was proved to be well suitable for the phenol degradation in the presence of surplus H₂O₂.

Key words:

超声波/过氧化氢, 苯酚, 协同效应, 动力学