Study On Simultaneous Effects Of Anodic-Cathodic Electrochemical Degeradation For Benzoci Acid

The advanced electro catalysis oxidation processes (AEOP) is a new type of advanced oxidation processes (AOP) which has developed recently. Since 1990s, the processes of indirect electro oxidation of organic compounds has attracted a great deal of attention, hydrogen peroxide (H₂O₂) generated by the reduction of oxygen on the cathode have much promise for treating organic toxicant. Generally, the electro-Fenton process can be realize in the no-diaphragm electrolysis system, where H₂O₂ is produced on the cathode in an acid medium and Fe2+ is added or offered by Fe anode. In this thesis, a new electrochemical oxidation system was used to treat the aqueous organic pollutant. It is constructed by a Ti/RuO2 anode and a self-made 2-ethylanthraquinone graphite-felt cathode. In this electrolysis system, the degradation of organic pollutant is realized by the simultaneous oxidation of active anode and oxidant species electro-generated on the cathode.In this thesis, 2-ethyl anthraquinone are selected as catalyst to modify the graphite felt cathode by the function of absorption and so the catalytic cathodes were made. The result of SEM show that the surface of graphite felt adsorbs some crystal the 2-ethyl anthraquinone. The result of the infrared scanner spectrum express there is characteristic peak value on the surface of graphite felt. The mechanisms of electro-generation for hydrogen peroxide and hydroxyl radical in two types of electrolysis system are studied. Results indicated, 2-ethyl anthraquinone could catalyze the reactions of oxygen reduction, further more, the influence of the time of reaction, the current density, the electrolyte concentration and the initial pH on the process of the electro analysis are systematically investigated. The result indicates that the existing of the 2-ethyl anthraquinone could improve the degradation efficiencies of Benzoic Acid.The Benzoic Acid removal in the electrolysis system which is composed of a 2-ethylanthraquinone graphite-felt cathode and a Ti/RuO2 anode with a diaphragm has been investigated. And it is compared with that in the electrolysis...