Decomposition of diazinon in aqueous solution by ozonation

The decomposition of diazinon in aqueous solution by ozonation was studied under various solution pH values, gaseous ozone dosages, gaseous pressure, alkalinity levels and solution temperatures. Ozonation has been shown to be feasible for achieving nearly complete decomposition of diazinon within 1 h. The surface tension of aqueous solution was found to be affected by the dissolved diazinon and influenced the oxidation mechanism of diazinon by ozonation in aqueous solution. The gas–liquid reaction model was well used to describe the transfer and reaction behaviors of reacting species in the system. The quasi-global kinetics based on a simplified consecutive reaction scheme was developed to describe the temporal behavior of diazinon decomposition in aqueous solution by ozonation.