Wet Scrubbers Coupled with Various Advanced Oxidation Processes for VOCs Removal

The traditional removal methods of volatile organic compounds (VOCs) face challenges such as catalyst deactivation, thermal deactivation, secondary pollution, and energy consumption. Wet scrubbers coupled with advanced oxidation processes (AOPs) can effectively remove VOCs and prevent the accumulation of intermediate products and catalyst deactivation, thus extending their lifespan and reducing secondary pollution. This paper reviews the principle, device design, and combined efficiency of this coupled process with various AOPs such as Fenton, Peroxymonosulfate (PMS), photochemical oxidation, ozone oxidation, and dielectric barrier discharge. In addition, the mechanisms between the reaction processes were summarized. Finally, this review evaluates the industrial application status of this technology, discusses the key challenges hindering its large-scale implementation, and outlines future research directions. This review provides a reference guide for the design of research schemes and the selection of processes for this technology.