陶瓷膜催化臭氧氧化处理苯酚模拟水的研究

含酚废水毒性强，易污染环境且不容易处理。通过陶瓷膜催化臭氧氧化处理苯酚模拟水，考察臭氧投加量、初始pH、膜通量和苯酚初始浓度对苯酚去除效果的影响，并探究其反应动力学以及机理。结果表明：在臭氧投加量为3.55 mg/min、初始pH为10.02、膜通量为75L/(m2?h)和苯酚初始质量浓度为20mg/L时，陶瓷膜催化臭氧氧化去除苯酚的效果最好，反应时间为45min时苯酚的去除率达到100%；陶瓷膜催化臭氧氧化降解苯酚遵循表观拟一级反应动力学规律。TBA（叔丁醇，羟基自由基抑制剂）的对照实验证明，陶瓷膜催化臭氧氧化降解苯酚基本上遵循自由基机理。

STUDY ON TREATMENT OF SIMULATED PHENOL CONTAINING WASTEWATER BY CATALYTIC OZONATION WITH CERAMIC MEMBRANE

The toxic phenol containing wastewater pollutes the environment and is difficult to treat. The treatment of simulated phenol containing wastewater by catalytic ozonation with ceramic membrane was conducted. The effects of ozone dosage, initial pH, membrane flux and initial phenol concentration on the removal of phenol and the reaction kinetics and mechanism were studied. The results showed that the catalytic ozonation coupled with ceramic membrane was the most effective for removing phenol at ozone dosage of 3.55 mg/min, initial pH of 10.02, membrane flux of 75 L/(m2?h) and initial concentration of phenol of 20 mg/L. After reaction for 45 min, the removal rate of phenol was 100%. The degradation of phenol by the catalytic oxidation coupled with ceramic membrane followed the apparent pseudo-first-order kinetic model. A comparative experiment of TBA (tert-butanol, hydroxyl radical scavenger) proved that the degradation of phenol by the catalytic oxidation coupled with ceramic membrane basically followed the free radical mechanism.