College of Civil Engineering and Architecture, Liaoning University of Technology, Jinzhou 121001, China E-mail:
Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China.
Water Sci Technol. 2021 May;83(10):2327-2344. doi: 10.2166/wst.2021.147.
Water pollution caused by refractory organics has attracted widespread concern in recent years. At this time peroxymonofulfate (PMS) has been widely used to generate sulfate radicals with high reactivity and potential. The direct reaction rate between PMS and organics is very low. However, the activated PMS has a strong oxidizing ability on organics due to its conversion into sulfate radicals. Recently, the free radicals generated by oxidant PMS and catalyst biochar have proven to be an effective species in dealing with refractory organics. In order to enable researchers to better understand the current research status of PMS/biochar, and to promote the development and application of PMS/biochar system, we have written this review. This review in detail described the mechanism of PMS activated by biochar materials, and summarized the influencing factors of refractory organics degradation in the PMS/biochar system. In addition, the active sites of PMS/biochar, the degradation mechanism of refractory organics, and the reusability of biochar catalysts were also discussed. Finally, the concluding remarks and perspectives were made for future research on the PMS/biochar system in the degradation of refractory organics.
近年来，由难降解有机物引起的水污染引起了广泛关注。此时过一硫酸盐（PMS）已被广泛用于生成具有高反应性和潜力的硫酸根自由基。PMS 与有机物的直接反应速率非常低。然而，由于其转化为硫酸根自由基，活化后的 PMS 对有机物具有很强的氧化能力。最近，氧化剂 PMS 和催化剂生物炭产生的自由基已被证明是处理难降解有机物的有效物质。为了使研究人员能够更好地了解 PMS/生物炭的当前研究状况，并促进 PMS/生物炭系统的发展和应用，我们撰写了这篇综述。本文详细描述了生物炭材料活化 PMS 的机制，并总结了 PMS/生物炭系统中难降解有机物降解的影响因素。此外，还讨论了 PMS/生物炭的活性位点、难降解有机物的降解机制以及生物炭催化剂的可重复使用性。最后，对 PMS/生物炭系统在难降解有机物降解方面的未来研究提出了结论和展望。
