CuO-Ru/A2lO3催化臭氧化降解苯乙酮的研究  

CuO-Ru/Al_2O_3 Catalytic Ozonation of Acetophenone in Water

作　　者：张华[1] 石锐[1] 臧兴杰[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》2010年第3期715-719,共5页Environmental Science

基　　金：国家自然科学基金项目(50578146);浙江省自然科学基金项目(Y5080178)

摘　　要：采用浸渍法制备了以活性Al2O3为载体的双组分催化剂CuO-Ru/Al2O3,利用该催化剂催化臭氧化降解了苯乙酮.结果表明,贵金属钌掺杂能显著提高CuO/Al2O3催化臭氧化苯乙酮的降解效率,如在相同条件下处理30 min后,单独臭氧氧化、CuO/Al2O3/O3和CuO-Ru/Al2O3/O3对苯乙酮水溶液的COD去除率分别为6.3%、20.0%和54.0%.pH对CuO-Ru/Al2O3催化臭氧化降解苯乙酮的效率并没有影响,但与单独臭氧化相比,该催化臭氧化体系更适合在中性或酸性条件下应用.CuO-Ru/Al2O3对水中臭氧有较好的催化分解活性,臭氧分解的速率常数达2.58×10-3s-1,高于二次水中臭氧的分解速率常数1.19×10-3s-1.叔丁醇的试验结果表明,CuO-Ru/Al2O3/O3降解苯乙酮反应遵循羟基自由基(.OH)反应机制.Two-component CuO-Ru based on active Al2O3（CuO-Ru/Al2O3） catalyst was prepared by incipient wetness impregnation and used to catalytic ozonation of acetophenone（AP）.The results showed that doping Ru could significantly improve the catalytic activity of CuO/Al2O3.For example,the COD removal rates of AP solution after 30min by ozonation alone,CuO/Al2O3/O3,and CuO-Ru/Al2O3/ O3 were 6.3%,20.0% and 54.0%,respectively.The change of pH almost had no affect on degradation efficiency of AP.However,a comparison of COD removal between ozonation alone and catalytic ozonation indicated that CuO-Ru/Al2O3 catalyst was more suitable for application in neutral or acidic condition.CuO-Ru/Al2O3 catalyst could accelerate decomposition rate of ozone in water,and its decomposition rate constant reached 2.58×10^-3 s^-1 while that of ozone alone in double-water was 1.19×10^-3 s1.The experimental result of t-butanol indicated that CuO-Ru/Al2O3 catalytic ozonation of AP followed a radical-type mechanism.

关 键 词：CuO-Ru/Al2O3催化剂 苯乙酮 COD 吸附 ·OH 

分 类 号：X703.1[环境科学与工程—环境工程]