蜂窝陶瓷催化臭氧化苯乙酮的研究  

Honeycomb-like ceramic used for catalytic ozonation of acetophenone in water

作　　者：刘朋朋[1] 张华[1] 石锐[1] 童少平[1] 马淳安[1] 

机构地区：[1]浙江工业大学化学工程与材料学院绿色化学合成技术国家重点实验室培育基地,杭州310032

出　　处：《环境科学学报》2010年第10期2043-2048,共6页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金项目(No.50578146, 20876151);高等学校博士点专项科研基金项目(No.SRFDP-20070337001)~~

摘　　要：研究了蜂窝陶瓷对臭氧化降解苯乙酮效率的影响.结果表明,蜂窝陶瓷显著提高了臭氧化降解苯乙酮的效率,叔丁醇的试验表明该体系遵循.OH氧化机理.蜂窝陶瓷催化臭氧化降解苯乙酮的动力学可分为2个阶段,第一阶段的表观动力学常数为8.77×10-4s-1,Rct为10.34×10-10;第二阶段的表观动力学常数为4.63×10-3s-1,Rct为172.34×10-10.基于降解过程的色度变化和水样原子吸收的分析结果,结合降解动力学可以推测:降解过程中蜂窝陶瓷催化剂中Ti4+的溶出是苯乙酮降解效率提高的主导因素.The effect of honeycomb-like ceramic on the efficiency of ozonation of acetophenone in water was investigated. The results showed that the presence of honeycomb-like ceramic can significantly improve the efficiency of ozonation of acetophenone. Based on a test with added tert-butanol,this catalytic ozonation system may follow the mechanism of ·OH oxidation. The kinetics of honeycomb-like ceramic catalytic ozonation of acetophenone could be divided into two stages. The values of the apparent reaction rate constant and Rct were 8.77×10-4 s-1 and 10.34×10-10 for the first stage; and 4.63×10-3 s-1 and 172.34×10-10 for the second stage. Based on the change of water color,atomic absorption spectrometry results and the degradation kinetics,we speculate that the enhanced degradation efficiency is mainly attributed to Ti4＋ leaching from the honeycomb-like ceramic.

关 键 词：苯乙酮 催化臭氧 蜂窝陶瓷 羟基自由基 降解 

分 类 号：X131[环境科学与工程—环境科学]