Electrocatalytic oxidation for organic wastewater: Recent progress in anode material, reactor, and process combination

With increasing human attention to environmental issues, organic wastewater's electrochemical advanced oxidation processes (EAOPs) are flourishing. This review looked back the recent efforts made by researchers to approach the commercial application of EAOPs. Bibliometric analysis was used to review the EAOPs used for COD removal in recent years. Recent progress in electrode materials, reactor design, and combined processes was introduced. Anode modifications based on Ti₄O₇ and nanocarbon materials may be promising directions for better electrocatalytic performance. The development of three-dimensional particle electrodes provides another approach for commercializing EAOPs. The optimization of the continuous-flow reactor structure may require more comprehensive water flow models. Combining EAOPs and other water treatment processes is necessary to reduce the energy consumption required for water treatment. More pilot and large-scale experiments for natural wastewater treatment are needed to better compare the performance differences of electrochemical systems under on-site and laboratory conditions.