标题: Promoted wet peroxide oxidation of chlorinated volatile organic compounds catalyzed by FeOCl supported on macro-microporous biomass-derived activated carbon

作者: Pan, C (Pan, Cong); Wang, WY (Wang, Wenyu); Fu, CC (Fu, Chenchong); Nam, JC (Nam, Jong Chol); Wu, F (Wu, Feng); You, ZX (You, Zhixiong); Xu, J (Xu, Jing); Li, JJ (Li, Jinjun)

来源出版物: JOURNAL OF COLLOID AND INTERFACE SCIENCE  卷: 646  页: 320-330  DOI: 10.1016/j.jcis.2023.05.004  提前访问日期: MAY 2023   出版年: SEP 15 2023  

摘要: Chlorinated volatile organic compounds (CVOCs) are a recalcitrant class of air pollutants, and the strongly oxidizing reactive oxygen species (ROS) generated in advanced oxidation processes (AOPs) are promising to degrade them. In this study, a FeOCl-loaded biomass-derived activated carbon (BAC) has been used as an adsorbent for accumulating CVOCs and catalyst for activating H2O2 to construct a wet scrubber for the removal of airborne CVOCs. In addition to well-developed micropores, the BAC has macropores mimicking those of biostructures, which allows CVOCs to diffuse easily to its adsorption sites and catalytic sites. Probe experiments have revealed HO center dot to be the dominant ROS in the FeOCl/BAC + H2O2 system. The wet scrubber performs well at pH 3 and H2O2 concentrations as low as a few mM. It is capable of removing over 90% of dichloroethane, trichloroethylene, dichloromethane and chlorobenzene from air. By applying pulsed dosing or continuous dosing to replenish H2O2 to maintain its appropriate concentration, the system achieves good long-term efficiency. A dichloroethane degradation pathway is proposed based on the analysis of intermediates. This work may provide inspiration for the design of catalyst exploiting the inherent structure of biomass for catalytic wet oxidation of CVOCs or other contaminants.

作者关键词: Biocarbon; CVOCs; FeOCl; Wet scrubber; AOPs; Catalytic wet peroxide oxidation

地址: [Pan, Cong; Wang, Wenyu; Fu, Chenchong; Nam, Jong Chol; Wu, Feng; You, Zhixiong; Li, Jinjun] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Bioresource & Environm Biotechnol, Wuhan 430079, Peoples R China.

[Xu, Jing] Wuhan Univ, State Key Lab Water Resources Engn & Management, Wuhan 430072, Hubei, Peoples R China.

通讯作者地址: Li, JJ (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Bioresource & Environm Biotechnol, Wuhan 430079, Peoples R China.

Xu, J (通讯作者)，Wuhan Univ, State Key Lab Water Resources Engn & Management, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址: jingxu0506@whu.edu.cn; lijinjun@whu.edu.cn

影响因子:9.9