A mini-review of the electro-peroxone technology for wastewaters: Characteristics, mechanism and prospect

The electro-peroxone technology, a novel type of advanced oxidation technology, is widely used in wastewater treatment. Herein, this paper reviews the advantages and problems of the electro-peroxone technology compared with electrochemical oxidation technology, ozonation technology, and traditional peroxone technology. Due to the high kinetics of pollutant degradation, the electro-peroxone process can reduce the reaction time and energy consumption of pollutant treatment in wastewater. The electro-peroxone technology can promote pollutant degradation and mineralization, which shows obvious synergistic effects of electrochemical oxidation and ozonation for wastewater treatment. Most importantly, the research mechanism of the electro-peroxone technology is systematically introduced from two aspects of cathode reaction and bulk reaction. The influence of experimental parameters on the wastewater treatment effect is also discussed. Finally, the potential applications and future research directions of the electro-peroxone technology in the wastewater field are proposed. The electro-peroxone process can offer a highly efficient and energy saving water treatment method to improve the performance of existing ozonation and electrochemical systems and has therefore become a promising electrochemical advanced oxidation process for wastewater treatment.