III International Conference

PP-II-100THE INFLUENCE OF CARBON ON WET PEROXIDE OXIDATION OF ORGANICPOLLUTANTS IN AQUEOUS MEDIAPestunova O., Ogorodnikova O., Kuznetsov V.Boreskov Institute of Catalysis SB RAS, Novosibirsk, RussiaE-mail: oxanap@catalysis.ruWet peroxide oxidation of phenol and ethanol in the presence of various carbon materials(nano-diamonds (ND), onion-like carbon (OLC), graphite-like carbon Sibunit and catalyticfilamentous carbon (CFC)) and/or Fe 3+ has been studied. All carbon types were found to below-active to oxidation of the both substrates without iron. The presence of ND inhibits as thephenol as ethanol oxidation catalyzed by Fe 3+ . The Sibunit, OLC, САС accelerate the ethanoloxidation. More complex effect was revealed in case on phenol oxidation.IntroductionThe combination of sorption by active carbons with destruction of the sorbate throughcatalytic oxidation, for example with Н 2 О 2 , [1] is considered promising process ofpurification of wastewater from toxic organic compounds. However the development of suchcomplex processes requires clear understanding of how the presence of a carbon materialaffects various stages of the process.In the literature, this problem is interpreted in three different manners. 1) The pure carbonmaterials can catalyze oxidation of organic substrates in aqueous solutions by hydrogenperoxide [2, 3]. 2) The presence of active carbon and adsorption of substrate on its surfaceincreases the rate of the oxidation reaction catalyzed by transition metals [4]. 3) Point of viewis quite the contrary, i.e. carbon in the solution is thought to behave as a free radicalscavenger, hence, to slow down free-radical oxidation processes [5].This work is aimed to answer the above questions. For this purpose influence of varioustypes of carbon materials on kinetics of H 2 O 2 destruction and oxidation of model substratesby hydrogen peroxide at presence of carbon materials and/or salts Fe is regularly investigated.The principal moment of our research was that we used the "pure" synthetic carbon materialsfree of metals impurities. The morphology and an electronic structure of these carbonmaterials were appreciably different.We chose well-known reactions of oxidation of phenol and ethanol with hydrogenperoxide as model reactions. Adsorption of these substrates and kinetics of their oxidationwere studied.345