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Updated: Sep 30, 2025

Implementation of a Hyperbolic Vortex Plasma Reactor for the Removal of Micropollutants in Water
Published on: July 25, 2025
Abatement of chlorobenzene by plasma catalysis: Parameters optimization through response surface methodology (RSM),
Xin Yu1, Xiaoqing Dang1, Shijie Li1
1School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Yanta Road. No. 13, Xi'an, Shaanxi Province, 710055, China; Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Yanta Road. No. 13, Xi'an, Shaanxi Province, 71005, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Yanta Road. No. 13, Xi'an, Shaanxi Province, 71005, China.
Abstract:
Dielectric barrier discharge coupled with 10 wt% Co/γ-Al2O3 catalyst was developed to degrade chlorobenzene in this study. The effects of experimental parameters including applied voltage, flow rate, initial chlorobenzene concentration, and their interactions on the chlorobenzene degradation performance were investigated by the response surface methodology integrated with a central composite design. Results indicated that applied voltage was the most significant parameter affecting the mineralization rate and the concentration of ozone generated, while energy yield was mainly determined by initial chlorobenzene concentration. As a key precursor of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorophenols were found during the identification of the intermediates produced during chlorobenzene degradation through GC-MS. Furthermore, HRGC-HRMS was used to detect the remaining byproducts on the catalyst surface after 3 and 10 h discharge time, and three types of PCDD/Fs (2,3,7,8-TCDF, 1,2,3,4,6,7,8-HCDF and OCDD) were detected after 10 h of discharge. The degradation mechanism of chlorobenzene was analyzed based on these detected intermediates, and the possible formation mechanisms of the three PCDD/Fs were proposed for the first time in plasma catalytic degradation of chlorobenzene.
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