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International Journal of Photoenergy
Volume 2014, Article ID 365862, 9 pages
http://dx.doi.org/10.1155/2014/365862
Research Article

Destruction of Toluene by the Combination of High Frequency Discharge Electrodeless Lamp and Manganese Oxide-Impregnated Granular Activated Carbon Catalyst

1Environmental Science & Engineering Research Center, Harbin Institute of Technology, Shenzhen Graduate School, Shenzhen 518055, China
2Postdoctoral Innovation Practice Base, Bureau of Public Works of Longgang Shenzhen Municipality, Shenzhen, Guangdong 518172, China
3School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia

Received 28 June 2014; Revised 21 August 2014; Accepted 8 September 2014; Published 13 October 2014

Academic Editor: Hongtao Yu

Copyright © 2014 Jianhui Xu 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

The destruction of low concentration of toluene (0–30 ppm) has been studied under the UV/photogenerated O3/MnO2-impregnated granular activated carbon (MnO2-impregnated GAC) process by the combination of self-made high frequency discharge electrodeless lamp (HFDEL) with MnO2-impregnated GAC catalyst. Experimental results showed that the initial toluene concentration can strongly affect the concentration of photogenerated O3 from HFDEL and the efficiency and mass rate of destruction of toluene via HFDEL/MnO2-impregnated GAC system. Active oxygen and hydroxyl radicals generated from HFDEL/MnO2-impregnated GAC system played a key role in the decomposition of toluene process and the intermediates formed by photolysis are more prone to be mineralized by the subsequent MnO2-impregnated GAC catalyst compared to the original toluene, resulting in synergistic mineralization of toluene by HFDEL/MnO2-impregnated GAC system. The role of MnO2-impregnated GAC catalyst is not only to eliminate the residual O3 completely but also to enhance the decomposition and mineralization of toluene.