Non-radical pathways in peracetic acid-based micropollutant degradation: A comprehensive review of mechanisms, detection methods, and promising applications

Using peracetic acid-based non-radical oxidation processes (PAA-based NOPs) effectively removes organic micropollutants in water treatment. PAA-based NOPs merits encompass the selective oxidation of organic contaminants, facilitated by the mildness of the non-radical active species generated, and a heightened tolerance to diverse water matrices. However, research on this topic is still in its infancy, and current studies have different perspectives and interpretations. In this study, we provide a comprehensive summary and examination of the mechanisms of four PAA-based NOPs, discussing their activation mechanisms, influencing factors, identification methods, and oxidation characteristics. Additionally, we examine the triggering mechanism and provide recommendations for controlling and regulating the occurrence of PAA-based NOPs. Finally, we highlight the potential applications and future challenges of PAA-based NOPs in aquatic environments. Through the analysis of relevant evidence, this study provides valuable insights into PAA-based NOPs, contributing to developing novel water treatment solutions.