COMPARING THE EFFICIENCY OF HYDROXYL RADICAL FORMATION DURING OZONE AND ADVANCED OXIDATION PROCESSES

摘要

Advanced oxidation processes (AOPs) have been defined as the aqueous phase chemical oxidation of target organic or inorganic pollutants by a process involving hydroxyl free radicals. Hydroxyl radical (~(..)OH) reacts very quickly with many organic species, displaying kinetic constants in the range from 10~8 to 10~(10) M~(-1)s~(-1). AOPs can be generated via a number of aqueous treatment scenarios including ozone, ozone/H2O2, UV/ozone, UV/H2O2, UV/H2O2/O3, Fenton’s processes and photocatalysis.