Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/143837
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dc.contributor.authorBao, Yuepingen_US
dc.contributor.authorOh, Wen-Daen_US
dc.contributor.authorLim, Teik-Thyeen_US
dc.contributor.authorWang, Rongen_US
dc.contributor.authorWebster, Richard Daviden_US
dc.contributor.authorHu, Xiaoen_US
dc.date.accessioned2020-09-25T04:44:24Z-
dc.date.available2020-09-25T04:44:24Z-
dc.date.issued2019-
dc.identifier.citationBao, Y., Oh, W.-D., Lim, T.-T., Wang, R., Webster, R. D., & Hu, X. (2019). Elucidation of stoichiometric efficiency, radical generation and transformation pathway during catalytic oxidation of sulfamethoxazole via peroxymonosulfate activation. Water Research, 151, 64–74. doi:10.1016/j.watres.2018.12.007en_US
dc.identifier.issn0043-1354en_US
dc.identifier.urihttps://hdl.handle.net/10356/143837-
dc.description.abstractIn this work, nano-bimetallic Co/Fe oxides with different stoichiometric Co/Fe ratios were prepared using a novel one-step solution combustion method. The nano-bimetallic Co/Fe oxides were used for sulfamethoxazole (SMX) degradation via peroxymonosulfate (PMS) activation. The stoichiometric efficiencies of the as-prepared nano-bimetallic catalysts were calculated and compared for the first time. The radical generation was identified by electron paramagnetic resonance (EPR) as well as chemical quenching experiments, in which different scavengers were used and compared. The catalytic PMS activation mechanism in the presence of catalyst was examined by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results showed that besides SO4•- and •OH, •OOH was also detected in the PMS/CoFeO2.5 system. Meanwhile, in addition to the previously proposed radical oxidation pathway, the results showed that SMX degradation also involved a non-radical oxidation, which could be verified by the degradation experiment without catalyst as well as the detection of 1O2. In the PMS activation process, cobalt functioned as the active site on CoFeO2.5 while Fe oxide functioned as the adsorption site. The electron transfer mechanism was proposed based on the XPS and metal leaching results. Additionally, via the detection of transformation products, different SMX transformation pathways involving nitration, hydroxylation and hydrolysis in the PMS/CoFeO2.5 system were proposed.en_US
dc.language.isoenen_US
dc.relation.ispartofWater researchen_US
dc.rights© 2018 Elsevier Ltd. All rights reserved. This paper was published in Water research and is made available with permission of Elsevier Ltd.en_US
dc.subjectEngineering::Civil engineeringen_US
dc.titleElucidation of stoichiometric efficiency, radical generation and transformation pathway during catalytic oxidation of sulfamethoxazole via peroxymonosulfate activationen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.schoolInterdisciplinary Graduate School (IGS)en_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.identifier.doi10.1016/j.watres.2018.12.007-
dc.description.versionAccepted versionen_US
dc.identifier.pmid30594091-
dc.identifier.volume151en_US
dc.identifier.spage64en_US
dc.identifier.epage74en_US
dc.subject.keywordsNano-bimetallic Oxidesen_US
dc.subject.keywordsStoichiometric Efficienciesen_US
item.fulltextWith Fulltext-
item.grantfulltextopen-
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