超声波光催化协同降解对甲基苯磺酸

Synergistic Degradation of 4-Toluene Sulfonic Acid by Ultrasonic with Photocatalysis

以对甲基苯磺酸水溶液为研究对象,进行了超声波、光催化单独处理以及超声波与光催化联合处理的研究。探讨了超声功率、频率、溶液初始pH等因素对对甲基苯磺酸的降解效率的影响。结果表明,超声波和光催化之间存在着协同效应;当溶液初始质量浓度30mg/L、光催化剂TiO2投加量为100mg/L、超声功率和频率分别为80W和45kHz、溶液pH为3.0、反应120min,对甲基苯磺酸降解率达到93.4%。结合紫外光谱、傅立叶红外光谱、化学需氧量、总有机碳的检测结果,确定其降解的最终产物是硫酸根、水和二氧化碳。

Degradation of 4-Toluene sulfonic acid（4-TSA） using ultrasonic method,photocatalysis and sonophotocatalysis was studied.The factors influencing degradation of 4-TSA including ultrasonic power,frequency,initial concentration and pH of 4-TSA aqueous solution were investigated.Results indicated that there exists synergistic effect on the degradation of 4-TSA between ultrasonic and photocatalysis.The degradation rate of 4-TSA was 93.4 % after 120min sonophoto-treatment under ultrasonic power 80W,ultrasonic frequency 45kHz,TiO2 concentration 100 mg /L,and initial concentration of 4-TSA 30mg /L and pH 3.It was found that the degradation products were SO24-,H2 O and CO2 based on the ultraviolet absorption spectroscopy,FT-IR,COD and TOC measurements.