School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, China.
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China.
Chemosphere. 2019 Jul;227:401-408. doi: 10.1016/j.chemosphere.2019.03.160. Epub 2019 Mar 29.
The traditional treatment processes for volatile organic compounds (VOCs) removal generally suffered several disadvantages, such as secondary air-pollutants. To overcome these issues, wet scrubber coupled with heterogeneous UV/Fenton was developed for gaseous VOCs (i.e. toluene) removal. ZSM-5 supported iron oxide (Fe/ZSM-5) was prepared as a multifunctional catalyst for activation of HO and enhancement of gas-liquid mass transfer. Toluene was removed efficiently by this coupled process with the removal efficiency of 85% during 120 min. Many intermediates were detected in the solution by GC-MS while no intermediates were observed in the outlet gas, suggesting that wet scrubber coupled with heterogeneous UV/Fenton could significantly reduce secondary air pollutants. The possible mechanism of toluene oxidation was proposed including the physical adsorption by Fe/ZSM-5 and OH oxidation. This study provides an environmentally benign and highly efficient chemical scrubbing process for gaseous VOCs removal.
传统的挥发性有机化合物（VOCs）去除处理工艺通常存在一些缺点，例如产生二次空气污染物。为了克服这些问题，湿式洗涤器与非均相 UV/Fenton 联合开发用于去除气态 VOCs（例如甲苯）。ZSM-5 负载氧化铁（Fe/ZSM-5）被制备为一种多功能催化剂，用于激活 HO 和增强气液传质。通过该耦合过程，甲苯的去除效率在 120 分钟内达到 85%。通过 GC-MS 在溶液中检测到许多中间产物，但在出口气体中未观察到中间产物，表明湿式洗涤器与非均相 UV/Fenton 联合可以显著减少二次空气污染物。提出了甲苯氧化的可能机制，包括 Fe/ZSM-5 的物理吸附和 OH 氧化。本研究为去除气态 VOCs 提供了一种环境友好且高效的化学洗涤工艺。
