Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and Mechanism
Peroxyacetic acid (PAA)-based advanced oxidation processes (AOPs) have attracted much attention in wastewater treatment by reason of high selectivity, long half-life reactive oxygen species (ROS), and wider applicability. In this study, cobalt ferrite (CoFe<sub>2</sub>O<sub>4</s...
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MDPI AG
2023-12-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/23/7906 |
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| author | Rong Li Xing Lu Jinxiang Gao Yifan Chen Shunlong Pan |
| author_facet | Rong Li Xing Lu Jinxiang Gao Yifan Chen Shunlong Pan |
| author_sort | Rong Li |
| collection | DOAJ |
| description | Peroxyacetic acid (PAA)-based advanced oxidation processes (AOPs) have attracted much attention in wastewater treatment by reason of high selectivity, long half-life reactive oxygen species (ROS), and wider applicability. In this study, cobalt ferrite (CoFe<sub>2</sub>O<sub>4</sub>) was applied to activate PAA for the removal of ofloxacin (OFX). The degradation of OFX could reach 83.0% via the CoFe<sub>2</sub>O<sub>4</sub>/PAA system under neutral conditions. The low concentration of co-existing anions and organic matter displayed negligible influence on OFX removal. The contributions of hydroxyl radicals (·OH), organic radicals (R-O·), and other reactive species to OFX degradation in CoFe<sub>2</sub>O<sub>4</sub>/PAA were systematically evaluated. Organic radicals (especially CH<sub>3</sub>C(O)OO·) and singlet oxygen (<sup>1</sup>O<sub>2</sub>) were verified to be the main reactive species leading to OFX destruction. The Co(II)/Co(III) redox cycle occurring on the surface of CoFe<sub>2</sub>O<sub>4</sub> played a significant role in PAA activation. The catalytic performance of CoFe<sub>2</sub>O<sub>4</sub> remained above 80% after five cycles. Furthermore, the ecotoxicity of OFX was reduced after treatment with the CoFe<sub>2</sub>O<sub>4</sub>/PAA system. This study will facilitate further research and development of the CoFe<sub>2</sub>O<sub>4</sub>/PAA system as a new strategy for wastewater treatment. |
| first_indexed | 2024-03-09T01:45:54Z |
| format | Article |
| id | doaj.art-5c0f1cedc723446d964c7e3a2232158f |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T01:45:54Z |
| publishDate | 2023-12-01 |
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| series | Molecules |
| spelling | doaj.art-5c0f1cedc723446d964c7e3a2232158f2023-12-08T15:22:42ZengMDPI AGMolecules1420-30492023-12-012823790610.3390/molecules28237906Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and MechanismRong Li0Xing Lu1Jinxiang Gao2Yifan Chen3Shunlong Pan4School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaSchool of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaSchool of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaSchool of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaSchool of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaPeroxyacetic acid (PAA)-based advanced oxidation processes (AOPs) have attracted much attention in wastewater treatment by reason of high selectivity, long half-life reactive oxygen species (ROS), and wider applicability. In this study, cobalt ferrite (CoFe<sub>2</sub>O<sub>4</sub>) was applied to activate PAA for the removal of ofloxacin (OFX). The degradation of OFX could reach 83.0% via the CoFe<sub>2</sub>O<sub>4</sub>/PAA system under neutral conditions. The low concentration of co-existing anions and organic matter displayed negligible influence on OFX removal. The contributions of hydroxyl radicals (·OH), organic radicals (R-O·), and other reactive species to OFX degradation in CoFe<sub>2</sub>O<sub>4</sub>/PAA were systematically evaluated. Organic radicals (especially CH<sub>3</sub>C(O)OO·) and singlet oxygen (<sup>1</sup>O<sub>2</sub>) were verified to be the main reactive species leading to OFX destruction. The Co(II)/Co(III) redox cycle occurring on the surface of CoFe<sub>2</sub>O<sub>4</sub> played a significant role in PAA activation. The catalytic performance of CoFe<sub>2</sub>O<sub>4</sub> remained above 80% after five cycles. Furthermore, the ecotoxicity of OFX was reduced after treatment with the CoFe<sub>2</sub>O<sub>4</sub>/PAA system. This study will facilitate further research and development of the CoFe<sub>2</sub>O<sub>4</sub>/PAA system as a new strategy for wastewater treatment.https://www.mdpi.com/1420-3049/28/23/7906peroxyacetic acidcobalt ferriteorganic radicalssinglet oxygenfluoroquinolone antibiotics |
| spellingShingle | Rong Li Xing Lu Jinxiang Gao Yifan Chen Shunlong Pan Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and Mechanism Molecules peroxyacetic acid cobalt ferrite organic radicals singlet oxygen fluoroquinolone antibiotics |
| title | Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and Mechanism |
| title_full | Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and Mechanism |
| title_fullStr | Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and Mechanism |
| title_full_unstemmed | Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and Mechanism |
| title_short | Activation of Peracetic Acid by CoFe<sub>2</sub>O<sub>4</sub> for Efficient Degradation of Ofloxacin: Reactive Species and Mechanism |
| title_sort | activation of peracetic acid by cofe sub 2 sub o sub 4 sub for efficient degradation of ofloxacin reactive species and mechanism |
| topic | peroxyacetic acid cobalt ferrite organic radicals singlet oxygen fluoroquinolone antibiotics |
| url | https://www.mdpi.com/1420-3049/28/23/7906 |
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