title: Electro-catalytic oxidation of phenacetin with a three-dimensional reactor: Degradation pathway and removal mechanism.
abstract: Phenacetin is a common analgesic, anti-arthritic and anti-rheumatic drug. This study dealt with the degradation of phenacetin in alkaline media using a three-dimensional reactor with particle electrodes. Particular attention was paid to the degradation pathway and the reaction mechanism in the system. Liquid chromatography coupled with time-of-flight mass spectrometry was used to identify the intermediates. The phenacetin was observed to be firstly cut off the branch chains main by direct oxidation, and then the intermediates further degraded to ring opening products by hydroxyl radical resulting from indirect oxidation and finally mineralized to CO2, H2O. A possible removal mechanism was proposed that direct and indirect oxidation together did effect on the pollutants with oxygen.
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160, China.
authors.forename: Mengshi
authors.initials: M
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160, China.
authors.forename: Yonggang
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry; D002384:Catalysis; D002853:Chromatography, Liquid; D004563:Electrochemistry; D004566:Electrodes; D017665:Hydroxyl Radical / Q000737:chemistry; D013058:Mass Spectrometry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D010615:Phenacetin / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D014867:Water; D002245:Carbon Dioxide; D017665:Hydroxyl Radical; D010615:Phenacetin; D010100:Oxygen
keywords: Degradation pathway; Phenacetin; Removal mechanism; Three-dimensional electrode reactor