采用O₃、VUV和VUV/O₃体系对气态甲苯进行降解对比实验，考察了在VUV/O₃体系下甲苯初始质量浓度、光照强度、O₃质量浓度、相对湿度和停留时间等因素对甲苯降解效率的影响，并对其反应动力学进行了初步探讨。结果表明，在这3种体系下，甲苯降解率由高到低的顺序为：VUV/O₃ > VUV > O₃。当VUV/O₃联合作用时，增大甲苯质量浓度，降解率降低；增大光照强度、延长停留时间，降解率升高；而提高O₃质量浓度和相对湿度，降解率先升高后降低。在适宜的反应条件下，降解率高达92.3%。另外，O₃和VUV对甲苯的降解存在协同作用，且该降解过程符合伪一级反应动力学。

The degradation experiments of gaseous toluene are carried out by O₃,VUV and VUV/O₃ processes,respectively for comparation.The effects of initial concentration of toluene,illumination intensity,O₃ concentration,relative humidity and retention time on the degradation efficiency of toluene are investigated under VUV/O₃ process,and the reaction kinetics is also studied.The results show that the degradation rates of toluene by these three processes rank in the order of VUV/O₃ > VUV > O₃.When using the integrated VUV/O₃ process,the degradation rate will decrease with the increase of toluene concentration,increase with the enhanced illumination intensity and prolonging retention time,and increase firstly and then decrease with the increases of O₃ concentration and relative humidity.The degradation rate can reach 92.3% under suitable conditions.In addition,it is found that synergistic effect exists between O₃ and VUV on the degradation of toluene,and the reaction process is in accordance with the pseudo-first order reaction kinetics.

卢峰(1992-),男,硕士研究生,研究方向为大气污染控制技术,1443087455@qq.com