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Journal of Nanomaterials
Volume 2012 (2012), Article ID 593924, 6 pages
http://dx.doi.org/10.1155/2012/593924
Research Article

Effect Factors of Benzene Adsorption and Degradation by Nano-TiO2 Immobilized on Diatomite

1School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
2College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China

Received 25 October 2012; Revised 11 November 2012; Accepted 26 November 2012

Academic Editor: Yong Yang

Copyright © 2012 Lijun Cheng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Difference between adsorption of benzene by diatomite and nano-TiO2 immobilized on diatomite was investigated. And effects of temperature, light intensity, relative humidity, and initial benzene concentration on adsorption and degradation of benzene by nano-TiO2 immobilized on diatomite were also studied. The experimental results showed that when initial benzene concentration was  mg L−1, it could be degraded to below safe concentration (  mg L−1) after 50 h when temperature was 20°C, but it just needed 30 h at 35°C. When light intensity was 6750 Lx, it needed 30 h for benzene to be degraded to below safe concentration, but benzene could barely be degraded without light. When relative humidity was 50%, benzene could be degraded to  mg L−1 after 30 h, while its concentration could be reduced to  mg L−1 at the relative humidity of 80%.