TIO2 SENSITIZED PHOTOMINERALIZATION KINETICS OF PHTHALIC-ANHYDRIDE

The photomineralization of phthalic anhydride (PA) in aqueous solution s over TiO2 particles has been investigated under UV-illumination, and then kinetics of CO2 generation have been followed. Effects of the aq ueous suspension pH, PA concentration, temperature, irradiation time, and light intensity are examined. A correction term, alpha(T), the dec rease in the solubility of CO2 with increasing temperature, is taken i nto account. The activation energy is found to be 3.19 kJ/mol. A quant um yield of 0.22 for CO2 formation is also calculated. (C) 1998 Elsevi er Science Ltd. All rights reserved.