Numerical Modeling of Ozonation of Organic Chemicals in Surface Water

Ozonation of organic chemicals generally can result in less toxic and more biodegradable products. It is proposed to use ozone as a potential decontaminant in case of chemical spill in surface waters. CCHE2D chemical model, a two-dimensional depth-averaged and process-based chemical fate and transport model, was developed for simulating multiple decontamination tests including two-chemical-reaction processes. In this study, toluene decontamination by ozone was selected as an example. Both chemicals' transport, fate and the reactions between these two are all taken into consideration. The model is also used to investigate the effectiveness of decontamination on the water quality by comparing the simulation results of a self-decay case with scenarios of ozonation. The hypothetical case demonstrated the model's capability to represent not only the chemical fate and transport but also the decontamination operations.