Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, PR China.
Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, PR China.
Water Res. 2021 Feb 1;189:116627. doi: 10.1016/j.watres.2020.116627. Epub 2020 Nov 10.
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.
过硫酸盐基高级氧化工艺（PS 基 AOPs）在紫外光、可见光或太阳光照射下，正被广泛研究用于水处理。在提高目标污染物去除性能方面已经取得了巨大进展，但仍需要更深入地了解光在不同光激活 PS 基 AOPs 中的作用，以此为提高效率提供基础。本文旨在深入综述过去十年中报道的各种常见光激活 PS 基 AOP 的潜在光激活机制和最新进展。基于对以往研究的全面调查，我们根据其反应机制对这些工艺进行分类，包括直接紫外辐射激活、染料敏化工艺、配体到金属电荷转移（LMCT）激活和光催化工艺。此外，还总结了这些工艺中污染物降解性能的提高与无光条件下的性能相比的情况。最后，我们通过提出开发高效光激活 PS 基 AOPs 的关键挑战和未来展望，为水处理和修复领域的发展提出建议。
