Kinetics of Photocatalytic Degradation of p-Toluenesulfonic Acid on TiO2 Surface
In the present work, the photocatalytic degradation of p-toluenesulfonic acid (p-TSA) was investigated in aqueous solutions containing TiO2 suspension as photocatalyst, especially the kinetics was discussed. The effects of the various operating parameters including initial concentration of p-TSA, pH value, TiO2 concentration and irradiation intensity etc were studied. Results showed that the kinetics of photocatalytic degradation of p-TSA in the presence of TiO2 was in accord with first-order Langmuir-Hinshelwood model when the initial concentration of p-TSA was lower than 100 mg·L-1. The apparent degradation rate constants decreased with increase of the initial concentration of p-TSA, and displayed with one-peak pattern with the increases of TiO2 concentration and aqueous pH value. As the increasing concentration of p-TSA, a trend that the degradation reaction transferred from first-order to zeroth-order reaction model was observed. The optimal operating parameters were consisted of pH at 3.0 and TiO2 of 100 mg·L-1. It was also observed the presence of air could accelerate the degradation rate dramatically.
ZHANG Ling ZHANG Ling CHANG Zhixian LI Deliang
Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, H Henan Yuantong Environmental Engineering Limited Compary, Kaifeng 475004, Henan, China
国际会议
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)
广东东莞
英文
205-209
2011-06-01（万方平台首次上网日期，不代表论文的发表时间）