Advanced Oxidation Processes for Water Purification Applications

The contamination of water resources has become a significant challenge that threatens the health and well-being of people’s daily life; it calls for new technologies to be applied for water purification. Heterogeneous Fenton or Fenton-like techniques have a lot of potential as a new approach for treating wastewater because of the advantages in efficiency, safety, and economics. Various advanced oxidation processes (AOPs) are comprehensively reviewed in this work, and the •OH generation methods including chemical, electro-chemical, and photochemical approaches are summarized. Some key parameters that influence the reaction efficiency such as the temperature, catalysts, H2O2 dosage, and pH are investigated. The reaction mechanism and process optimization of photocatalysis are specifically highlighted.