PHOTOCATALYTIC OXIDATION OF CHLORINATED ORGANIC-COMPOUNDS OVER TIO2 MEMBRANE COATED ON GLASS TUBE

Photodegradation of trichloroethylene (TCE), as a model compound of chlorinated organic compounds, was carried out in different reaction conditions of pH, dissolved oxygen, initial concentration and addition of some chemicals over TiO2 membrane coated on a glass tube. The photodegradation rate increased with the increase in dissolved oxygen concentration. However, the pH effect was not significant. Periodate ions accelerated the reaction rate drastically but hydrogen peroxide decreased and the addition of thiocyanate ions discontinued the reaction immediately. More than 40 % of the stoichiometric equivalent of dissolved oxygen concentration was sufficient to decompose 90 % of the initial TCE. However, a higher dissolved oxygen concentration was more effective for reduction of the by-product.