Chapter 9: Promising Electrocatalytic Ozonation Processes for Water and Wastewater Treatment Check Access

Electro-peroxone (E-peroxone) is a novel electrocatalytic ozonation process that combines ozonation with in situ generation of hydrogen peroxide (H₂O₂) from cathodic oxygen (O₂) reduction. It overcomes the main drawbacks of conventional ozonation and electrochemical processes, e.g. the selective oxidation of ozone (O₃) and the formation of harmful by-products (e.g. bromate, perchlorate and halogenated organics) and thus considerably improves the performance of water treatment. Compared with conventional advanced oxidation processes (AOPs), the E-peroxone process shows superior performance in terms of pollutant removal kinetics, energy efficiency, operational flexibility and environmental friendliness. Since its appearance in 2013, the E-peroxone process has been successfully applied to remove refractory industrial pollutants, abate emerging contaminants, control harmful oxidation by-products, regenerate spent activated carbon and remove bacteria and antibiotic resistance genes. Furthermore, it has recently been integrated with different technologies to further enhance the performance of water and wastewater treatment in various applications. Due to its superior performance, the E-peroxone process has been widely recognized as an excellent alternative to conventional AOPs and an important next-generation AOP for future water and wastewater treatment.