Photodegradation of 2,4,6 trinitrotoluene, nitrobenzene mixtures in TIO2 suspension


By Nguyen Van Chat, Do Ngoc Khue, Nguyen Van Hung, Tran Van Chung, I. Francis  Cheng



The photo catalytic oxidation of nitrobenzene, 2, 4,6-trinitrotoluene in aqueous suspensions of titanium dioxide (TiO2 Degussa type P25 was investigated. Under oxygen conditions, irradiation with the Pyrex-filtered out put of 15 W high pressure mercury-arc lamp resulted in complete (more 90 %) mineralization of 50 ppm of TNT, 30 ppm of NB within few hours. At the beginning irradiation, reduction by conduction band electrons may play a more significant role in the photo catalytic degradation of the studied mixtures. The resulted in aromatic ammine compounds were more easily to be oxidized by the hydroxyl radicals.

Keywords: Nitrobenzene, 2,4,6-Trinitrobenzene, UV ray, TiO2, Photo catalysis.

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