Persulfate-based advanced oxidation processes (PS-based AOPs) under UV, visible, or solar irradiation are being intensively investigated for water treatment. Tremendous advances have been made for enhancing the performance towards the destruction of target pollutants, but a deeper understanding of the role of light in different photo-activated PS-based AOPs is still needed as a basis for improving the efficiency. This paper intends to provide an in-depth review of the underlying photo-activation mechanisms and recent progress in various common photo-activated PS-based AOPs reported over the last decade. Based on a comprehensive survey of previous studies, we categorize these processes according to their reaction mechanisms, including activation by direct UV radiation, processes based on dye-photosensitization, activation through ligand-to-metal charge transfer (LMCT), and photocatalytic processes. Moreover, the improvement in performance of contaminant degradation in these processes compared with those in the absence of light are summarized. Finally, we conclude this review by proposing critical challenges and future perspectives for developing efficient photo-activated PS-based AOPs toward improvement in water treatment and remediation.

目前正在深入研究在紫外线，可见光或太阳光照射下基于过硫酸盐的高级氧化工艺（基于PS的AOP）以进行水处理。在增强销毁目标污染物的性能方面已经取得了巨大进展，但是仍然需要对光在不同的光活化PS基AOP中的作用有更深入的了解，以此作为提高效率的基础。本文旨在提供对潜在的光激活机制的深入综述，以及近十年来各种常见的基于光激活的PS的AOP的最新进展。根据对先前研究的全面调查，我们根据这些反应的反应机理对这些过程进行了分类，包括直接UV辐射活化，基于染料光敏化的过程，通过配体到金属的电荷转移（LMCT）和光催化过程进行活化。此外，总结了与不存在光的情况相比，在这些过程中污染物降解性能的改进。最后，我们通过提出关键挑战和未来观点来结束本综述，以开发有效的基于光活化PS的AOP，以改善水处理和修复。