Abstract:

The experimental effect and influencing factors of MnO₂ /bentonite catalytic ozonation on chlorobenzene wastewater and its reaction kinetics have been studied. The catalyst grain diameter, dosing quantity, and ozone flux are considered to be the main influencing factors. When the ozone flux is 5.0 mg/min, carrier grain diameter 0.150-0.125 mm(100 to 120 sieve numbers), and catalyst dosage 1 g, the best removing rate of chlorobenzene is 96.56%. The experiments follow the pseudo-first-order reaction kinetics. The degradation apparent speed constant of chlorobenzene in catalytic ozonation series is 0.056 min-1, which is 1.6 times of individual ozonation speed constant.

Key words: chlorobenzene, MnO₂ /bentonite, catalytic ozonation, reaction kinetics

摘要：

对MnO₂/膨润土催化臭氧化氯苯废水试验效果和影响因素进行了研究，初步研究了反应动力学特征。试验结果表明：催化剂粒径、投加量、臭氧通量等对试验效果有很大影响。臭氧通量在5.0 mg/min，载体粒径为0.150~0.125 mm（100~120目），催化剂投加量为1 g时，氯苯最佳去除率可达96.56%。MnO₂/膨润土催化臭氧化氯苯废水反应遵循一级反应动力学；催化臭氧化体系中氯苯的降解表观速率常数0.056 min-1，是单独臭氧氧化速率常数的1.6倍。

关键词: 氯苯, MnO₂/膨润土, 催化臭氧化, 反应动力学

CLC Number: 

• X703.1