| Title: | Nonthermal plasma coupled with liquid-phase UV/Fe-C for chlorobenzene removal |
| Author(s): | Qin C; Jiang C; Liu R; Huang J; Yu R; Zhang P; |
| Address: | "School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China. Electronic address: qincaihong@xauat.edu.cn. School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, 710055, China. Research Center of Air Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China" |
| DOI: | 10.1016/j.chemosphere.2023.139279 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Catalyst poisoning problems limit the application of gas-solid non-thermal plasma (NTP) catalyzed decomposition of chlorinated volatile organic compounds (Cl-VOCs). To mitigate the catalyst deactivation, catalyst iron-loaded activated carbon (Fe-C) was added to the UV-activated liquid phase downstream of the NTP reactor (NTP + UV/Fe-C(L)) for the degradation of chlorobenzene (CB) in this study. The CB removal efficiency and mineralization efficiency (MR) of NTP + UV/Fe-C(L) were up to 94% and 68%, respectively, which were increased by 39% and 30% compared with the single NTP system. Compared with the conventional gas-solid NTP + UV/Fe-C(S) system, the stability of the NTP + UV/Fe-C(L) system was significantly improved due to the dissolved organic intermediates and low residuals on the catalyst surface. Reactive oxygen species .OH and .O(2)(-) dominated the decomposition of CB in the liquid phase, and with the help of UV, much more .OH and .O(2)(-) were produced by Fe-C catalytic O(3). In addition, Fe-C improved the removal of CB by increasing its absorption mass transfer coefficient from 0.0016 to 0.0157 s(-1). The degradation pathway of CB in the NTP + UV/Fe-C(L) system was proposed based on the detected organic intermediates. Overall, this study provides a new tactic to solve the catalyst poisoning problem in the NTP catalytic oxidation of Cl-VOCs" |
| Keywords: | *Iron *Plasma Gases Oxidation-Reduction Catalysis Chlorobenzenes Chlorobenzene Fe-C Liquid-phase catalysis Nonthermal plasma; |
| Notes: | "MedlineQin, Caihong Jiang, Chaochao Liu, Rongrong Huang, Jiayu Yu, Rui Zhang, Peng eng England 2023/06/26 Chemosphere. 2023 Oct; 337:139279. doi: 10.1016/j.chemosphere.2023.139279. Epub 2023 Jun 23" |
