| Title: | A novel UV-assisted PEC-MFC system with CeO(2)/TiO(2)/ACF catalytic cathode for gas phase VOCs treatment |
| Author(s): | Chen Q; Liu L; Liu L; Zhang Y; |
| Address: | "Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China. Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China; School of Ocean Science and Technology, Dalian University of Technology, Panjin, 124221, China. Electronic address: lifenliu@dlut.edu.cn" |
| DOI: | 10.1016/j.chemosphere.2020.126930 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Emissions of volatile organic compounds (VOCs) air pollutants could worsen air quality and adversely affect human health, thus developing more efficient low-temperature VOCs removal techniques is desired. A novel continuous system integrating UV-assisted photo-electrochemical catalysis with microbial fuel cell (UV-assisted PEC-MFC) has been established for promoting removal of gaseous ethyl acetate or toluene and generating electricity simultaneously. In this system, CeO(2)/TiO(2)/ACF catalytic cathode is prepared and used for combination with bio-anode for accelerating cathodic reaction. This UV-assisted PEC-MFC system exhibits an excellent elimination capacity (EC) of ethyl acetate ( approximately 0.39 g/m(3), EC: approximately 2.52 g/m(3)/h) or toluene ( approximately 0.29 g/m(3), EC: 1.89 g/m(3)/h) under close-circuit condition. Furthermore, an outstanding elimination capacity (EC: 28.04 g/m(3)/h) for high concentration toluene ( approximately 4.10 g/m(3)) removal is obtained after toluene gas passes sequentially through the catalytic cathode then the bio-anode. This way of PEC degradation and biodegradation, avoids inhibition of exoelectrogens activity from toxicity of high concentration toluene. Simultaneously, the cell voltage of UV-assisted PEC-MFC system is stable at 0.11 V (vs. SCE) and 1.452x10(-4) kWh is generated from treatment of toluene gas stream in 6 h duration time. The possible mechanism of VOCs removal in this novel system has been proposed and discussed. This study provides new technical basis for treating gaseous pollutants via integrating photo-electrochemical catalysis with electricity generating microbial fuel cell for energy conversion" |
| Keywords: | "Air Pollutants/chemistry Biodegradation, Environmental Bioelectric Energy Sources Catalysis Electricity Electrodes Environmental Pollutants Gases Titanium Toluene/chemistry Ultraviolet Rays Volatile Organic Compounds/*chemistry CeO(2)/TiO(2)/ACF cathode E;" |
| Notes: | "MedlineChen, Qiyuan Liu, Lu Liu, Lifen Zhang, Yizhen eng England 2020/05/14 Chemosphere. 2020 Sep; 255:126930. doi: 10.1016/j.chemosphere.2020.126930. Epub 2020 May 3" |
