The investigation on ultrasonic degradation of acid fuchsine in the presence of ordinary and nanometer rutile TiO2 and the comparison of their sonocatalytic activities

The ordinary and nanometer rutile titanium dioxide (TiO2) powders were used as sonocatalysts for the degradation of acid fuchsine. A variety of factors affecting sonocatalytic degradation in the presence of ordinary and nanometer rutile TiO2 were studied. The experimental results indicated that the degradation ratios of acid fuchsine in the presence of ordinary and nanometer rutile TiO2 powders were much better than one without any TiO2 under onefold ultrasonic irradiation. For ordinary and nanometer rutile TiO2 powders, the sonocatalytic ability of ordinary rutile TiO2 powder was more apparent than that of the nanometer rutile TiO2 powder. The best degradation ratio of acid fuchsine can be obtained at the ultrasonic irradiation of 40 kHz frequency and 50 W power, 500 mg/L TiO2 adding amount, pH = 3.0 and 20 mg/L acid fuchsine as the initial concentration. The experimental results indicated that the method of sonocatalytic degradation of organic pollutants in the presence of TiO2 powder was an advisable choice for treating organic wastewaters for non- or low-transparent and fuscous dye wastewater.