Ozonation Catalyzed by TiO2/Zeolite for Degradation of Nitrobenzene in Aqueous Solution

摘要：

This paper investigated the catalytic ozonation of aqueous nitrobenzene (NB) in the presence of nano-TiO2/zeolite. The removal efficiency of NB was increased from ozone alone at 12.57％ to in the present of catalyst at 33.76％, significantly. The optimum calcination temperature of nano-TiO2/zeolite was found out at 600℃. Catalytic ozonation of nitrobenzene was first order reaction with respect to the initial concentration of nitrobenzene. With the dose of radical scavengers increased, the degradation of NB decreased significantly, which proved that OH· was the dominating species in the oxidation process. Removal rate of NB increased with the increase of temperature from 10℃ to 40℃. NB degradation varied with pH value, and reached the best removal rate at approximately pH 10.Catalyst showed good stability after 3 times repeated uses.

关键词： nanosized TiO2 catalytic ozonation zeolite nitrobenzene

作者: ZHANG Jing MA Jun LIU Bai-cang TANG Li WANG Sheng-jun YANG Yi-xin

作者单位: School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China Department of Environmental Science and Engineering,Tsinghua University,Beijing 100084,China

会议类型: 国际会议

会议名称: The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2009-06-11（万方平台首次上网日期，不代表论文的发表时间）