Efficient decomposition of sulfamethoxazole in a novel neutral Fered-Fenton like/oxalate system based on effective heterogeneous-homogeneous iron cycle |
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| Institution: | 1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Wuhan 430074, China;1. Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454 Marne-la-Vallée, France;2. IEM (Institut Européen des Membranes), UMR 5635, CNRS, ENSCM, UM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier Cedex 5, France;3. Department of Civil, Architectural and Environmental Engineering, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy;4. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via Di Biasio 43, 03043 Cassino, FR, Italy;5. IHE Delft, Institute for Water Education, Westvest 7, 2611 AX Delft, The Netherlands;1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Wuhan 430074, PR China;1. Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024 China;2. Department of Civil and Environmental Engineering, University of Connecticut, 261 Glenbrook Road Unit 2037, Storrs, CT 06269-2037, United States;1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China;2. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, 430074, PR China;1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Hunan Provincial Engineering Research Center for Resource Recovery and Safe Disposal of Industrial Solid Waste (Hunan Heqing Environmental Technology Co., Ltd.), Changsha 410032, PR China;3. CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China;1. Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, No. 130 Meilong Road, Shanghai 200237, China;2. State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, No. 130 Meilong Road, Shanghai 200237, China |
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| Abstract: | In this study, efficient sulfamethoxazole (SMX) degradation was demonstrated in a novel neutral Fered-Fenton like/oxalate (electro-Fe2+/PDS/Ox, Fered-FL/Ox) system adopting pre-anodized Ti@TiO2 cathode. Optimization of operational parameters was conducted and the whole reaction mechanism based on the critical solid-liquid interfacial reactions was explored. An efficient neutral heterogeneous-homogenous iron cycle would exist in the Fered-FL/Ox system, depending on the formation of specific C OTi bonds through the inner sphere surface complex (ISSC) of Fe(C2O4)33−. It would induce ultrafast electron transfer from the cathode to the FeIII core, effectively accelerating the neutral Fenton-like reactions and complete mineralization of SMX with relative low dosage of ferrous catalyst and applied voltage. The result of this study is expected to supply a good alternative in treating complex neutral industrial wastewaters |
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| Keywords: | Fered-fenton like Heterogeneous iron cycle Iron-oxalate complexes Surface electron transfer Persulfate |
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