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Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

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Results and DiscussionPP-V-20In Fig. 1. are given <strong>the</strong> results obtained using gas chromatography for <strong>the</strong> monitoring <strong>of</strong>CWPO <strong>of</strong> toluene.Relative concentration decrease [%]100From <strong>the</strong> diagram can be concludedthat approx. 90% <strong>of</strong> toluene initiallypresent in <strong>the</strong> reaction system wasremoved within <strong>the</strong> first two hours <strong>of</strong> <strong>the</strong>50reaction.Satisfying results were obtained in<strong>the</strong> electrochemical process as well. The0investigation carried out using carbon0 100 200Time [min]glass electrode and Al-PILC basedcarbon glass electrode showed no peakFig. 1. Toluene degradation vs. reaction timecorresponding to <strong>the</strong> toluene oxidation.On <strong>the</strong> o<strong>the</strong>r hand, each steady state voltammogram obtained using Al-Cu PILC basedelectrode in 0.1 M H 2 SO 4 and in different concentration toluene solutions as a variable,showed broad anodic peaks at around 0.5V vs. Ag/AgCl. This peak current increased alongwith <strong>the</strong> increase <strong>of</strong> toluene concentration. The obtained anodic peaks can be ascribed to <strong>the</strong>electrooxidation <strong>of</strong> toluene. According to <strong>the</strong>se results only Al-Cu PILC showed to be activefor <strong>the</strong> toluene electrooxidation under <strong>the</strong> experimental conditions.ConclusionBoth CWPO and electrooxidation confirmed <strong>the</strong> possibility <strong>of</strong> <strong>the</strong> use <strong>of</strong> syn<strong>the</strong>sized Al-Cu PILC in <strong>the</strong> toluene oxidation reaction and should be employed in <strong>the</strong> environmentalprotection.AcknowledgementsThis work was supported by <strong>the</strong> Ministry <strong>of</strong> Science <strong>of</strong> <strong>the</strong> Republic <strong>of</strong> Serbia (ProjectsTR6712B and 142019B).References1. E.R.L. Tiburtius, P. Peralta-Zamora, A. Emmel, J. Hazard. Mater. B 126 (2005) 86.2. R. Andreozzi, V. Caprio, A. Insola, R. Marotta, R. Sanchirico, Water Res. 34(2) (2000) 620.3. B. Kasprzyk-Hordern, M. Ziółek, J. Nawrocki, Appl. Catal. B 46 (2003) 639.4. V. Kaloidas, C.A. Koufopanos, N.H. Gangas, N.G. Papayannakos, Microporous Mater. 5 (1995) 97.5. J. Barrault, J.-M. Tatibouet, N. Papayannakos, C.R. Acad. Sci., Ser. IIc: Chim. 3 (2000) 777.495

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