Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate
Four kinds of manganese oxides were successfully prepared by hydrothermal and redox precipitation methods, and the obtained oxides were used for CIP removal from water by activating PMS. The microstructure and surface properties of four oxides were systematically characterized. The results showed th...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-10-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/88/8/2174 |
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| author | Xiaoyan Li Hongbin Zhang Guozhen Zhang Tianhong Zhou Rui Min |
| author_facet | Xiaoyan Li Hongbin Zhang Guozhen Zhang Tianhong Zhou Rui Min |
| author_sort | Xiaoyan Li |
| collection | DOAJ |
| description | Four kinds of manganese oxides were successfully prepared by hydrothermal and redox precipitation methods, and the obtained oxides were used for CIP removal from water by activating PMS. The microstructure and surface properties of four oxides were systematically characterized. The results showed that ε-MnO2 prepared by the redox precipitation method had large surface area, low crystallinity, high surface Mn(III)/Mn(Ⅳ) ratio and the highest activation efficiency for PMS, that is, when the concentration of PMS was 0.6 g/L, 0.2 g/L ε-MnO2 could degrade 93% of CIP within 30 min. Multiple active oxygen species, such as sulfate radical, hydroxyl radical and singlet oxygen, were found in CIP degradation, among which sulfate radical was the most important one. The degradation reaction mainly occurred on the surface of the catalyst, and the surface hydroxyl group played an important role in the degradation. The catalyst could be regenerated in situ through the redox reaction between Mn4+ and Mn3+. The ε-MnO2 had the advantages of simple preparation, good stability and excellent performance, which provided the potential for developing new green antibiotic removal technology.
HIGHLIGHTS
Epsilon-MnO2 nanoflowers were simply prepared by the redox precipitation method.;
Epsilon-MnO2 nanoflowers were used to activate PMS to degrade CIP in water.;
The high activity of ε-MnO2 was due to its large surface area, low crystallinity and high surface Mn(III)/Mn(Ⅳ) ratio.;
The –OH groups on the surface could promote the activation of PMS.; |
| first_indexed | 2024-03-11T11:12:06Z |
| format | Article |
| id | doaj.art-053e7dcc213e426faf8a524ce8ab34c3 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-03-11T11:12:06Z |
| publishDate | 2023-10-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-053e7dcc213e426faf8a524ce8ab34c32023-11-11T12:15:07ZengIWA PublishingWater Science and Technology0273-12231996-97322023-10-018882174218810.2166/wst.2023.326326Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfateXiaoyan Li0Hongbin Zhang1Guozhen Zhang2Tianhong Zhou3Rui Min4 School of Environment and Municipal Engineering, Lanzhou Jiaotong University, 88 Anningxi Road, Anning District, Lanzhou City, Gansu Province 730070, China CSCEC AECOM CONSULTANTS CO., LTD, 459 Dingxi Road, Chengguan District, Lanzhou City, Gansu Province 730030, China School of Environment and Municipal Engineering, Lanzhou Jiaotong University, 88 Anningxi Road, Anning District, Lanzhou City, Gansu Province 730070, China School of Environment and Municipal Engineering, Lanzhou Jiaotong University, 88 Anningxi Road, Anning District, Lanzhou City, Gansu Province 730070, China School of Environment and Municipal Engineering, Lanzhou Jiaotong University, 88 Anningxi Road, Anning District, Lanzhou City, Gansu Province 730070, China Four kinds of manganese oxides were successfully prepared by hydrothermal and redox precipitation methods, and the obtained oxides were used for CIP removal from water by activating PMS. The microstructure and surface properties of four oxides were systematically characterized. The results showed that ε-MnO2 prepared by the redox precipitation method had large surface area, low crystallinity, high surface Mn(III)/Mn(Ⅳ) ratio and the highest activation efficiency for PMS, that is, when the concentration of PMS was 0.6 g/L, 0.2 g/L ε-MnO2 could degrade 93% of CIP within 30 min. Multiple active oxygen species, such as sulfate radical, hydroxyl radical and singlet oxygen, were found in CIP degradation, among which sulfate radical was the most important one. The degradation reaction mainly occurred on the surface of the catalyst, and the surface hydroxyl group played an important role in the degradation. The catalyst could be regenerated in situ through the redox reaction between Mn4+ and Mn3+. The ε-MnO2 had the advantages of simple preparation, good stability and excellent performance, which provided the potential for developing new green antibiotic removal technology. HIGHLIGHTS Epsilon-MnO2 nanoflowers were simply prepared by the redox precipitation method.; Epsilon-MnO2 nanoflowers were used to activate PMS to degrade CIP in water.; The high activity of ε-MnO2 was due to its large surface area, low crystallinity and high surface Mn(III)/Mn(Ⅳ) ratio.; The –OH groups on the surface could promote the activation of PMS.;http://wst.iwaponline.com/content/88/8/2174ciprofloxacindegradationmanganese (hydroxyl) oxideperoxymonosulfatereactive oxygen species |
| spellingShingle | Xiaoyan Li Hongbin Zhang Guozhen Zhang Tianhong Zhou Rui Min Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate Water Science and Technology ciprofloxacin degradation manganese (hydroxyl) oxide peroxymonosulfate reactive oxygen species |
| title | Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate |
| title_full | Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate |
| title_fullStr | Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate |
| title_full_unstemmed | Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate |
| title_short | Epsilon-MnO2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate |
| title_sort | epsilon mno2 simply prepared by redox precipitation as an efficient catalyst for ciprofloxacin degradation by activating peroxymonosulfate |
| topic | ciprofloxacin degradation manganese (hydroxyl) oxide peroxymonosulfate reactive oxygen species |
| url | http://wst.iwaponline.com/content/88/8/2174 |
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