School of Environment, Tsinghua University, Beijing 100084, China.
Department of Chemistry and Biochemistry, California State University at Northridge, Northridge, CA, 91330, United States.
Water Res. 2021 Jan 1;188:116479. doi: 10.1016/j.watres.2020.116479. Epub 2020 Sep 30.
Peracetic acid (PAA) has attracted growing attention as an alternative oxidant and disinfectant in wastewater treatment due to the increased demand to reduce chlorine usage and control disinfection byproducts (DBPs). These applications have stimulated new investigations on PAA-based advanced oxidation processes (AOPs), which can enhance water disinfection and remove micropollutants. The purpose of this review is to conduct a comprehensive analysis of scientific information and experimental data reported in recent years on the applications of PAA-based AOPs for the removal of chemical and microbiological micropollutants from water and wastewater. Various methods of PAA activation, including the supply of external energy and metal/metal-free catalysts, as well as their activation mechanisms are discussed. Then, a review on the usage of PAA-based AOPs for contaminant degradation is given. The degradation mechanisms of organic compounds and the influence of the controlling parameters of PAA-based treatment systems are summarized and discussed. Concurrently, the application of PAA-based AOPs for water disinfection and the related mechanisms of microorganism inactivation are also reviewed. Since combining UV light with PAA is the most commonly investigated PAA-based AOP for simultaneous pathogen inactivation and micropollutant oxidation, we have also focused on PAA microbial inactivation kinetics, together with the effects of key experimental parameters on the process. Moreover, we have discussed the advantages and disadvantages of UV/PAA as an AOP against the well-known and established UV/HO. Finally, the knowledge gaps, challenges, and new opportunities for research in this field are discussed. This critical review will facilitate an in-depth understanding of the PAA-based AOPs for water and wastewater treatment and provide useful perspectives for future research and development for PAA-based technologies.
过氧乙酸（PAA）作为一种替代氧化剂和消毒剂在废水处理中受到越来越多的关注，因为需要减少氯的使用并控制消毒副产物（DBP）。这些应用刺激了基于过氧乙酸的高级氧化工艺（AOP）的新研究，该工艺可以增强水的消毒效果并去除微量污染物。本综述的目的是对近年来报道的关于基于过氧乙酸的 AOP 用于去除水和废水中化学和微生物微量污染物的科学信息和实验数据进行全面分析。讨论了各种过氧乙酸活化方法，包括外部能量供应和金属/无金属催化剂，以及它们的活化机制。然后，对基于过氧乙酸的 AOP 用于污染物降解的应用进行了综述。总结并讨论了有机化合物的降解机制以及过氧乙酸处理系统控制参数的影响。同时，还综述了基于过氧乙酸的 AOP 用于水消毒的应用以及相关微生物失活动力学。由于将紫外线与过氧乙酸结合是最常用于同时灭活病原体和氧化微量污染物的最常用的基于过氧乙酸的 AOP，我们还重点研究了基于过氧乙酸的微生物失活动力学，以及关键实验参数对该过程的影响。此外，我们讨论了 UV/PAA 作为 AOP 对抗著名和成熟的 UV/HO 的优缺点。最后，讨论了该领域研究的知识差距、挑战和新机遇。本批判性综述将有助于深入了解基于过氧乙酸的 AOP 用于水和废水处理，并为基于过氧乙酸的技术的未来研究和开发提供有用的观点。
