A STUDY OF OPTIMAL EXPERIMENTAL CONDITIONS IN THE PHOTOCATALYTIC DEGRADATION OF AN ORGANOPHOSPHOROUS INSECTICIDE

摘要

The photodegradation in aqueous solutions of dimethyl 2,2 dichloro vinyl phosphate (common name DDVP or Dichlorvos), which is an organophosphorous insecticide, was studied by using illumination with UV lamp and solar exposure. TiO_2 was used as a photocatalyst. In photocatalytic degradation, different TiO-2 amounts, different illumination times and different pH values were examined in order to determine the optimal experimental conditions. DDVP removals at different initial DDVP concentrations under these conditions were investigated.