Highly effective degradation of ibuprofen by alkaline metal-doped copper oxides via peroxymonosulfate activation: Mechanisms, degradation pathway and toxicity assessments.

Autor: Zheng MW; Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan., Lin CW; Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan., Chou PH; Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan., Chiang CL; National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan., Lin YG; National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan., Liu SH; Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan; Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan. Electronic address: shliu@mail.ncku.edu.tw.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 Jan 15; Vol. 462, pp. 132751. Date of Electronic Publication: 2023 Oct 10.
DOI: 10.1016/j.jhazmat.2023.132751
Abstrakt: Redox ratios of Cu 2+ /Cu + and adsorbed oxygen species (O ads ) have shown great activity toward radical generation by activating peroxymonosulfate (PMS). Herein, different alkaline metal oxides (CaO, MgO and BaO) and various amounts of CaO are incorporated into CuO, which could tune the main active sites of redox ratios of Cu 2+ /Cu + and O ads . The results show that CaO-CuO-5% exhibits the outstanding performance of PMS activation toward ibuprofen (IBF) degradation with excellent kinetics (k = 0.812 min -1 ). The X-ray absorption spectroscopy (XAS) and density functional theory (DFT) calculation show that the CaO-CuO-5% has the higher electron density with superior electron transfer ability and lower PMS adsorption energy. Based on radical scavengers and electron paramagnetic resonance spectrometer (EPR), a nonradical process is proposed to play the dominant role. The degradation pathway and the corresponding toxicity of degraded intermediates with residue PMS after reaction is evaluated by LC-MS/MS and bioassay experiments, indicating the lower antagonistic influence on human hormone receptors after advanced oxidation process. Mitigation of the Cu leaching with cyclic stability can be achieved. This study provides a facile method to optimize high-performance catalysts to activate PMS and offer practical environmental applications in the remediation of emerging contaminants.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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