纳米TiO_2/沸石/UV催化臭氧化水中硝基苯的研究  

Degradation of Nitrobenzene by Nano-TiO_2/Zeolite/UV Catalyzed Ozonation in Aqueous Solution

作　　者：赵丹[1] 董延茂[2] 王楠[1] 鲍治宇[2] 

机构地区：[1]苏州科技学院环境学院,江苏苏州215011 [2]苏州科技学院化学与生物工程学院,江苏苏州215009

出　　处：《环境科技》2010年第1期19-23,共5页Environmental Science and Technology

基　　金：建设部科技攻关基金资助项目(2008-K4-19);江苏省科技厅高校科研成果产业化推进项目(JHZD08-31);苏州市科技发展计划工业攻关项目(SD0847)

摘　　要：设计了O3/纳米TiO2/沸石(体系A)和O3/纳米TiO2/沸石/UV(体系B)2种催化臭氧化体系并将其用于处理水中的硝基苯,研究了影响处理效果的主要因素,并对2种方法进行了比较。结果表明,2种催化臭氧化体系都能产生大量的羟自由基,加速硝基苯的降解,其中体系B对硝基苯的降解效果最好。随着进气流量的增加、温度的升高硝基苯的降解速率都会加快。催化臭氧化反应速率遵循一级反应规律,与苯酚的初始浓度和催化剂的用量关系不大。pH值对苯酚去除率有重要的影响,随pH值的升高,苯酚去除率显著提高。叔丁醇对硝基苯的降解有很强的抑制作用。The effects of O3/TiO2/zeolite （system A） and O3/TiO2/zeolite/U V （system B） systems on the removal of nitrobenzene from water have been discussed, respectively. Both the system A and the system B, especially system B, can convert ozone to hydroxyl radical, which help to decompose the nitrobenzene of the water. Results show that the degradation rate of nitrobenzene increases with the increasing air flow and temperature. The catalytic ozonation reaction is first order with no respect to the initial concentration of nitrobenzene and the dosage of catalyst. With the increase of pH, the removal rate of nitrobenzene increases which plays a key role in the removal of nitrobenzene. Results also indicate that, there is inhibitory effect of tert-butyl alcohol on the degradation of nitrobenzene.

关 键 词：催化臭氧化 纳米二氧化钛 沸石 硝基苯 

分 类 号：X7[环境科学与工程—环境工程]