Electrochemical in situ regeneration of granular activated carbon using a three-dimensional reactor |
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| Authors: | Hong Sun Zhigang Liu Ying Wang Yansheng Li |
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| Institution: | 1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou City, Jiangsu 221008, PR China;2. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou City, Jiangsu 221008, PR China;1. Institute of Chemical Engineering & Technology, University of the Punjab, Lahore, Pakistan;2. Arvia Technology Limited, Daresbury Innovation Centre, Keckwick Lane, Daresbury, Cheshire WA4 4FS, UK;3. Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, AB T2N 1N4, Canada;1. Aalborg University, Department of Chemistry and Bioscience, Section of Chemical Engineering, Niels Bohrs Vej 8, DK-6700 Esbjerg, Denmark;2. Danish Technical University, Denmark;1. Department of Civil and Environmental Engineering, Stanford University, Jerry Yang and Akiko Yamazaki Energy and Environment Building, 473 Via Ortega, Stanford, CA 94305, United States;2. National Science Foundation Engineering Research Center for Re-Inventing the Nation''s Urban Water Infrastructure (ReNUWIt), United States;3. Adrian Wilcox High School, Santa Clara, CA 95015, United States;4. Woodside High School, Woodside, CA 94062, United States |
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| Abstract: | Electrochemical in situ regeneration of granular activated carbon (GAC) saturated with phenol was experimentally investigated using a three-dimensional electrode reactor with titanium filter electrode arrays. The feasibility of the electrochemical regeneration has been assessed by monitoring the regeneration efficiency and chemical oxygen demand (COD). The influence of the applied current, the effluent flow rate, and the effluent path of the electrochemical cell have been systematically studied. Under the optimum conditions, the regeneration efficiency of GAC could reach 94% in 2 hr, and no significant declination was observed after five-time continuous adsorption-regeneration cycles. The adsorption of organic pollutants was almost completely mineralized due to electrochemical oxidation, indicating that this regeneration process is much more potentially cost-effective for application. |
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| Keywords: | granular activated carbon electrochemical regeneration phenol three-dimensional |
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