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Degradation of monofluorophenols in water irradiated with gaseous plasma
Authors:Haiming Yang  Giya Mengen  Yuki Matsumoto  Meguru Tezuka
Institution:1. Graduate School of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 3690293, Japan;2. School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China;1. College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, 213001, PR China;2. Institute of Environmental Science, Fudan University, Shanghai, 200433, PR China;1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;2. Medical College, Soochow University, Suzhou 215123, China;1. Laboratoire de Génie des Procédés Plasma et Traitement de Surfaces (LGPPTS), UPMC, 11, rue pierre et marie curie, 75005 Paris, France;2. Laboratoire des Réactions et Génie des Procédés (LRGP), ENSIC, 1, rue Grandville BP 20451, 54001 Nancy Cedex, France;3. Laboratoire de Biomatériaux et Bioingénierie (LBB), UL, 10, rue de l’Espinay, Québec, Canada G1L 3L5;1. School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China;2. Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, China;1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2. Centre for Clean Environment and Energy, Griffith University, Gold Coast Campus, QLD 4222, Australia
Abstract:Decomposition of aqueous monofluorophenols (MFPs) was investigated by contact glow discharge electrolysis (CGDE). During CGDE, both MFPs and the corresponding total organic carbon (TOC) in water were consumed smoothly, suggesting that carbon atoms of benzene nucleus could be eventually mineralized to inorganic carbon (IC). And all the fluorine atoms in the MFPs were equally converted to fluoride ions. Based on the primary intermediates from each starting materials, it showed that aromatic hydroxylation preferentially occurred at the para- or ortho- position to the phenolic OH group of each MFPs. The disappearance of both MFPs and TOC followed the first-order rate law. The apparent rate constants for the decay of MFPs were independent from the pKa values of MFPs.
Keywords:fluorophenol  decomposition  contact glow discharge electrolysis  first-order rate law
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