Modeling aqueous ozone/UV process using oxalic acid as probe chemical

A kinetic model that describes the removal of organic pollutants by an ozone/UV process is described. Oxalic acid, which reacts with a very low rate constant with ozone and relatively high rate constant with hydroxyl radical (OH center dot), was used as the probe chemical to model the process. The model was verified by experimental data on concentrations of oxalic acid and hydrogen peroxide (H2O2) under various experimental conditions, i.e., ozone gas dosage, UV light intensity, and varying oxalic acid concentrations.