PII: SO0456535(98)00204-S EFFECT OF ADSORBENTS COATED WITH TITANIUM DIOXIDE ON THE PHOTOCATALYTIC DEGRADATION OF PROPOXUR

Photocatalytic oxidation of pesticides in aqueous media irradiated by UV light is a rapidly growing field of research. Therefore, the treatment technology for degradation of propoxur (an insecticide) using titanium dioxide coated on the supports such as activated carbon, zeolite, brick, quartz and glass beads. was performed in this research. Results show that GACiTiOl is the best complexing agent for oxidizing propoxur because of its adsorption properities. The others follow the sequence: plain TiOz> glass beads> zeolite> brick> quartz. The degradation rate of propoxur with plain TiOz is higher than that with TiOz/GAC complexing agent. But the mineralization rate of propoxur with plain TiOz is lower than that with Ti02IGAC complexing agent. However, it can be concluded that using GAC as the support can improve the photocatalytic efficiency 01998 Elsevier Science Ltd. All rights reserved KEY WORD