Walnut Shell Loaded with Cobalt Ferrite as Efficient Peroxymonosulfate Activator to Degrade Ofloxacin
In this study, the walnut shell (WS) supported CoFe 2 O 4 nanopowder material (CoFe 2 O 4 /WS) were synthesized and characterized by X-ray diffraction, scanning electron microscopy, fourier transform infrared spectrometer, transmission electron microscope and X-ray photoelectron spectroscopy. The Co...
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Veröffentlicht in: | Water, air, and soil pollution air, and soil pollution, 2023-05, Vol.234 (5), p.305, Article 305 |
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Sprache: | eng |
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Zusammenfassung: | In this study, the walnut shell (WS) supported CoFe
2
O
4
nanopowder material (CoFe
2
O
4
/WS) were synthesized and characterized by X-ray diffraction, scanning electron microscopy, fourier transform infrared spectrometer, transmission electron microscope and X-ray photoelectron spectroscopy. The CoFe
2
O
4
/WS exhibited excellent catalytic activity in the process of activating peroxymonosulfate (PMS) to degrade ofloxacin (OFL). The results showed that 92.8% of OFL removal efficiency and 76.1% of mineralization rate were achieved at 1 g L
–1
CoFe
2
O
4
/WS, 1 g L
–1
PMS within 30 min. Moreover, the results of coexisting anions and organic matter indicated that the CoFe
2
O
4
/WS/PMS system has a certain anti-interference ability in complex environment. Furthermore, radical identification experiment demonstrated that SO
4
·−
was the dominant active substance during the OFL degradation process, and a possible activation mechanism of PMS by CoFe
2
O
4
/WS was proposed. Finally, possible degradation pathways of OFL were inferred based on the reaction intermediates detected by high-performance liquid chromatography-mass spectrometry. These findings will enrich the understanding of sulfate radical-advanced oxidation process (SR-AOPs) for antibiotic wastewater treatment and will guide the development of metal-organic frameworks as catalysts for PMS. |
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ISSN: | 0049-6979 1573-2932 |
DOI: | 10.1007/s11270-023-06318-4 |