Decoloration of azo dye by a multi-needle-to-plate high-voltage pulsed corona discharge system in water |
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| Institution: | 1. School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, PR China;2. Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024, PR China;1. Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, University of New South Wales, Sydney NSW 2052, Australia;2. Experimental and Research Centre, Fujian Longking Co., Ltd., Longyan 364000, China;1. RUPT, Department of Applied Physics, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium;2. LIWET, Department of Green Chemistry & Technology, Ghent University, Graaf Karel de Goedelaan 5, 8500 Kortrijk, Belgium;3. PLASMANT, Department of Chemistry, University of Antwerp Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium;1. School of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China;2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China;3. School of Environmental Science and Engineering, State Key Laboratory of Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai, China;4. McGill UnivDept Civil Engn, Montreal PQ H3A 0C3, Canada;5. Institut de Recherche de Chimie Paris (IRCP), Equipe 2PM (Procédés, Plasmas, Microsystèmes), UMR 8247, Chimie ParisTech-CNRS, 11 Rue Pierre et Marie Curie, 75005 Paris, France;1. Clarkson University, Plasma Research Laboratory, Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Potsdam, NY 13699, USA;2. Clarkson University, Department of Civil and Environmental Engineering, 8 Clarkson Avenue, Potsdam, NY 13699, USA;1. Laboratoire de Génie Electrique, Université A. Mira de Béjaïa, 06000 Béjaïa, Algeria;2. Electrical Engineering Department, University of Setif_1, 19000, Algeria |
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| Abstract: | The decoloration efficiency of azo dye (Acid Orange 7, AO7) using a multi-needle-to-plate high-voltage pulsed corona discharge system was investigated in this paper. The effect of several parameters, including peak pulse voltage and pulse frequency of the discharge system, initial pH and electrical conductivity of the dye solution, mode of needle electrode distribution and gas flow rate on the decoloration rate of the dye wastewater was reviewed. The results obtained show that the pulsed discharge system with a multi-needle-to-plate electrode could dispose azo dye wastewater efficiently. The decoloration rate increased with an increase in applied peak pulse voltage and pulse frequency. Decoloration was more efficient in the acidic solution, and the decoloration rate displayed no marked change under solutions of differing electrical conductivity. For the case in which we example the effect of gas flow rate on the decoloration efficiency of Acid Orange solution, we found that better decoloration efficiency occurred using the seven-needle-to-plate discharge system, which had more discharge anodes. |
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