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GC/MS分析表明:水中微量间二甲苯在以高压汞灯为光源,负载型纳米TiO2为光催化剂的作用下生成了间甲基苯甲醛和2,6-二甲基苯酚等中间产物。初始浓度在6.68mg/L~17.36mg/L,水中微量间二甲苯的光催化氧化过程不是一个简单的反应,反应可由一级反应动力学方程拟合,其表观速率常数随着溶液初始浓度的增大而减小,半衰期则随溶液初始浓度的增大而增加。
The results of GC / MS showed that the intermediate product of m-xylene in water and m-xylene in the presence of high pressure mercury lamp as light source and the supported nano-TiO2 as photocatalyst. The initial concentration of 6.68mg / L ~ 17.36mg / L, the trace of the m-xylene photocatalytic oxidation process is not a simple reaction, the reaction can be fitted by the first-order reaction kinetics equation, the apparent rate constant with the initial concentration of the solution The half-life increases with the initial concentration of the solution.