Mechanism of catalytic ozonation for elimination of methyldopa with Fe3 O4 SiO2 @CeO2 catalyst
© 2021 Water Environment Federation.
| Veröffentlicht in: | Water environment research : a research publication of the Water Environment Federation. - 1998. - 93(2021), 12 vom: 30. Dez., Seite 2903-2913 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2021
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| Zugriff auf das übergeordnete Werk: | Water environment research : a research publication of the Water Environment Federation |
| Schlagworte: | Journal Article catalytic ozonation magnetic catalyst mechanism methyldopa Water Pollutants, Chemical Methyldopa 56LH93261Y Ozone 66H7ZZK23N mehr... |
| Zusammenfassung: | © 2021 Water Environment Federation. In this study, a magnetic nanocatalyst (Fe3 O4 SiO2 @CeO2 ) was prepared and applied in the catalytic ozonation of methyldopa (MD). The effects of operational parameters on catalytic ozonation performance were investigated, including ozone dosage, catalyst dosage, initial MD concentration, and pH. The removal of MD was 45.2% in ozonation, whereas the efficiency was achieved to 83.0% with the addition of Fe3 O4 @SiO2 @CeO2 . The results showed that Fe3 O4 @SiO2 @CeO2 could significantly improve the catalytic ozonation performance. And the enhanced mechanism study showed that it was attributed to promotion of ozone decomposition to generate hydroxyl radical. The reaction model was explored, and the reaction rates were calculated for the MD degradation in catalytic ozonation. A higher degradation efficiency of MD in catalytic ozonation was attributed to the enhanced surface effect of the catalysts, which was confirmed by using TBA, PO4 3- , and p-BQ as scavengers of hydroxyl radical, surface reaction, and superoxide radical. The hydroxyl radical and superoxide radical played an important role in the degradation of MD. The mechanism of catalytic ozonation by Fe3 O4 @SiO2 @CeO2 was discussed via X-ray photoelectron spectroscopy (XPS) spectra and experimental data |
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| Beschreibung: | Date Completed 14.12.2021 Date Revised 14.12.2021 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1554-7531 |
| DOI: | 10.1002/wer.1622 |