首页|Efficient degradation of ibuprofen by Co/Fe@CNFs catalyst in the presence of peroxymonosulfate and persulfate: Characterization, performance, and mechanism comparison
Efficient degradation of ibuprofen by Co/Fe@CNFs catalyst in the presence of peroxymonosulfate and persulfate: Characterization, performance, and mechanism comparison
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NSTL
Elsevier
Background: Ibuprofen (IBP) is typically ubiquitous in various environments, which has negatively impacted microorganisms, animals, and human health. Methods: A carbon nanofiber-supported bimetallic catalyst (Co/Fe@CNFs) was synthesized by electrospinning and carbonization for sulfate radical-based advanced oxidation processes (SR-AOPs) in IBP treatment. Co and Fe nanoparticles were wrapped inside the CNFs to avoid agglomeration and achieve uniform distribution. The performances of catalysts were evaluated via IBP degradation efficiencies. Findings: Co/Fe@CNFs could efficiently activate both peroxymonosulfate and persulfate, achieving 100% and 89.1% degradation of IBP within 60 min with an activation energy of 37.4 and 65.4 kJ/mol, respectively. In the PMS system, both Co and Fe catalyze PMS to generate reactive oxygen species (SO4 center dot, center dot OH, O2(center dot) and O-1(2)), all of which contributed significantly to degradation. However, the main functional species were SO4 center dot and center dot OH in the Fe activated PS system. This work would deepen the understanding of sulfate radical-based advanced oxidation process to further expand its application in environmental remediation. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
NSTL
Elsevier
