Title :
Ozonation Catalyzed by TiO2/Zeolite for Degradation of Nitrobenzene in Aqueous Solution
Author :
Zhang Jing ; Ma Jun ; Liu Bai-Cang ; Tang Li ; Wang Shengjun ; Yang Yi-Xin
Author_Institution :
Sch. of Municipal & Environ. Eng., Harbin Inst. of Technol., Harbin, China
Abstract :
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 600degC. 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 10degC to 40degC. 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.
Keywords :
biochemistry; catalysis; catalysts; chemical technology; nanocomposites; organic compounds; pH; titanium compounds; toxicology; zeolites; TiO2; aqueous solution; catalytic ozonation; first order reaction; nano-titanium oxide/zeolite; nitrobenzene degradation; nitrobenzene removal efficiency; optimum calcination temperature; pH value; radical scavengers; Degradation; Detectors; Glass; Inductors; Niobium; Ovens; Oxidation; Scanning electron microscopy; Temperature; Titanium;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5163164
