Chemistry of Aqueous Ozone and Transformation of Pollutants by Ozonation and Advanced Oxidation Processes

Ozonation is widely and successfully applied for many types of oxidative water treatments. Its chemical effects can be described by considering the sequences of highly selective direct reactions of molecular ozone and the reactions of the more reactive but less selective OH radicals which are always produced from decomposed ozone in aqueous systems. These radicals also control the ozone based AOPs (Advanced Oxidation Processes). In some cases even formation and reactions of additional secondary oxidants, such as carbonate radicals, hypobromite, and hydrogen peroxide have to be accounted for.