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

fYear

2009

fDate

11-13 June 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICBBE.2009.5163164

Filename

5163164