The electrochemical advanced oxidation processes coupling of oxidants for organic pollutants degradation: A mini-review

Abstract The electrochemical advanced oxidation processes (EAOPs) have been extensively applied in the treatment of organic pollutants degradation. Herein, the mini review provides the coupling systems about EAOPs and different oxidants (e.g., persulfate (PS), peroxymonosulfate (PMS), and ozone (O3)), including EAOPs-PS systems, EAOPs-PMS systems, EAOPs-peroxone systems, and photoelectro-oxidants systems, for the organic compounds degradation. The coupling system of EAOPs with oxidants is an effective way to improve the generated free radicals (e.g., HO and SO4 −) concentration and to accelerate pollutant degradation. In this review, we make a summary of the homogeneous and heterogeneous EAOPs-oxidant processes. The reaction mechanisms of EAOPs combined with different oxidants are elucidated in detail, as well as the synergistic effect for improving the degradation and mineralization efficiency.