高级氧化过程(AOPs)中单线态氧的特性、生成途径和检测方法综述,Chemical Engineering Journal

高级氧化工艺 (AOP) 已广泛用于污染物分解以减少其危害。特别是，单线态氧 ( 1 O 2 ) 介导的 AOPs 因其在实际废水处理中具有良好的抗水基质能力而被认为是一种很有前途的去污方法。然而，对于1 O 2在废水处理中的重要作用，仍有一些疑问。因此，有必要在最新研究的基础上，对1 O 2的特性、检测方法和生成途径进行全面总结。在这篇综述中，1 O 2的各种特性全面概括了其分子结构、轨道能量、溶剂寿命、反应特性和反应途径。接下来，总结了催化臭氧化、过氧化氢、过硫酸盐、高碘酸盐、光催化、电化学和过氧乙酸活化系统等1 O 2的生成途径。另外，1 O 2可以通过荧光探针、化学发光探针、猝灭试验、电子顺磁共振、氧化氘实验、产物分析等多种方法检测。多种检测方法的结合可以提高1 O 2的准确度检测。最后还指出了1 O 2的机理探索、检测手段和实际应用中存在的不足和改进之处。期待该综述能为后续1 O 2介导的AOPs研究提供新的启发。

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Advanced oxidation processes (AOPs) have been widely used in contaminants decomposition to reduce their harm. Especially, the singlet oxygen (1O2)-mediated AOPs have been considered a promising decontamination method due to their good ability to resist water matrix in actual wastewater treatment. However, there are still some doubts about the important role of 1O2 in wastewater treatment. Therefore, it is necessary to comprehensively summarize the characteristics, detection methods, and generation pathways of 1O2 based on the latest research. In this review, various characteristics of 1O2 are comprehensively summarized, including its molecular structure, orbital energy, lifetime in solvents, reaction characteristics and reaction pathways. Next, the generation pathways of 1O2 including catalytic ozonation, hydrogen peroxide, persulfate, periodate, photocatalysis, electrochemical, and peracetic acid activation systems are summarized. Additionally, 1O2 can be detected by various methods such as fluorescence probes, chemiluminescence probes, quenching tests, electron paramagnetic resonance, deuterium oxide experiments, and product analysis. The combination of multiple detection methods can improve accuracy of 1O2 detection. Finally, the existing deficiencies and improvements in mechanism exploration, detection means and practical application of 1O2 are also contained. It is expected that this review can provide new inspiration for subsequent research on 1O2 -mediated AOPs.