College of Ecology and Environment, School of Chemical Engineering and Technology, Xinjiang University, Urumchi 830017, China.
School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, China.
Environ Sci Technol. 2024 Oct 22;58(42):18456-18473. doi: 10.1021/acs.est.4c07202. Epub 2024 Oct 10.
Volatile organic compounds (VOCs) are considered to be the most recalcitrant gaseous pollutants due to their high toxicity, diversity, complexity, and stability. Gas-solid catalytic oxidation methods have been intensively studied for VOC treatment while being greatly hampered by energy consumption, catalyst deactivation, and byproduct formation. Recently, aqueous advanced oxidation processes (AOPs) have attracted increasing interest for the deep oxidation of VOCs at room temperature, owing to the generation of abundant reactive oxygen species (ROS). However, current reviews mainly focus on VOC degradation performance and have not clarified the specific reaction process, degradation products, and paths of VOCs in different AOPs. This study systematically reviews recent advances in the application of aqueous AOPs for gaseous VOC removal. First, the VOC gas-liquid mass transfer and chemical oxidation processes are presented. Second, the latest research progress of VOC removal by various ROS is reviewed to study their degradation performances, pathways, and mechanisms. Finally, the current challenges and future strategies are discussed from the perspectives of synergistic oxidation of VOC mixtures, accurate oxidation, and resource utilization of target VOCs via aqueous AOPs. This perspective provides the latest information and research inspiration for the future industrial application of aqueous AOPs for VOC waste gas treatment.
挥发性有机化合物（VOCs）被认为是最难处理的气态污染物，因为它们具有高毒性、多样性、复杂性和稳定性。气体-固体催化氧化法已被广泛研究用于 VOC 处理，但由于能耗高、催化剂失活和副产物形成，该方法受到了很大的限制。最近，由于能够生成大量活性氧物种（ROS），水相高级氧化法（AOPs）在室温下对 VOC 的深度氧化引起了越来越多的关注。然而，目前的综述主要集中在 VOC 的降解性能上，并没有阐明不同 AOPs 中 VOC 的具体反应过程、降解产物和途径。本研究系统地综述了水相 AOPs 在气态 VOC 去除中的应用进展。首先，介绍了 VOC 的气-液传质和化学氧化过程。其次，综述了各种 ROS 去除 VOC 的最新研究进展，以研究它们的降解性能、途径和机制。最后，从 VOC 混合物的协同氧化、准确氧化以及通过水相 AOP 对目标 VOC 进行资源利用的角度，讨论了当前的挑战和未来的策略。本综述为水相 AOPs 在 VOC 废气处理中的未来工业应用提供了最新信息和研究启示。
