Effect of oxygen concentration on the kinetics of the photocatalytic degradation of dichloroacetic acid.

C.S. ZALAZAR; C.A. MARTÍN; A.E. CASSANO

España

Congreso; SPEA 3. 3rd European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications; 2004

The effect of oxygen concentration on the photocatalytic oxidation of low concentration, aqueous solutions of dichloroacetic acid (DCA) - a typical by product of chlorine disinfection - was studied employing titanium dioxide and UV radiation. The study aims at the development of an intrinsic and complete reaction kinetics (apt for scaling-up purposes) that will consider also the oxygen demand as one of the design variables. This problem becomes particularly important for liquids having a very high COD. This objective can be achieved only if the laboratory reactor is precisely modeled in order to use the complete mathematical description of de process in combination with a multi parameter estimation to evaluate the reaction kinetic constants.