Ultrasonic Study on Degradation Performance of The methyl orange
Gu Wei, Huang Jie (Shaoguan Environmental Monitoring Station, Shaoguan 512026, China)
Ultrasound is a new technique to eliminate organic pollutants in water. In the last ten years, the study on the degradation of pollutants in water by ultrasound was very active. However, due to some limitations of this technique, such as high power and low efficiency in degradation, more effective ways were applying ultrasound in combination with other waste treatment techniques. The study selected the methyl orange as the degrading target, applied nano-scale TiO2 as the catalyst and adopted the ultrasonic wave oxidization method, to have a feasibility research on the degrading rate of ultrasonic wave on methyl orange, on the impact of H2O2, TiO2, and the above factors, etc. The result indicated, the longer the ultrasonic time, the larger the degrading rate. The degrading rate was up to 13.6 % after ultrasonic for 100 min. The initial density of solution rose from 4 mg/L to 10 mg/L, and the degrading rate from 6.3 % to 13.6 %. Acidic conditions are favorable to the degradation of the methyl orange. Add 3 mL of H2O2 (30 %) could significantly improve the degradation rate. When combining ultrasound with photocatalytic oxidization to deal with the waste water, the degradation efficiency was significantly improved. Moreover, it was greater than simple addition of these two. This proved that functional coordination existed between ultrasound and photocatalysis.
【CateGory Index】： X703