Novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol
Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Hongliang Chen [verfasserIn] Longjiang Li [verfasserIn] Yutao Zhang [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
In: Water Science and Technology - IWA Publishing, 2021, 86(2022), 9, Seite 2106-2123 |
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| Übergeordnetes Werk: |
volume:86 ; year:2022 ; number:9 ; pages:2106-2123 |
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Link aufrufen |
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| DOI / URN: |
10.2166/wst.2022.349 |
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| Katalog-ID: |
DOAJ02636588X |
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| 520 | |a Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; | ||
| 650 | 4 | |a glucose | |
| 650 | 4 | |a m-cresol degradation | |
| 650 | 4 | |a peroxymonosulfate | |
| 650 | 4 | |a pyrolysis reduction | |
| 650 | 4 | |a scavenging experiment | |
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| 700 | 0 | |a Yutao Zhang |e verfasserin |4 aut | |
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10.2166/wst.2022.349 doi (DE-627)DOAJ02636588X (DE-599)DOAJ068ab170cba94aa297d62f95cd0248cf DE-627 ger DE-627 rakwb eng TD1-1066 Hongliang Chen verfasserin aut Novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; glucose m-cresol degradation peroxymonosulfate pyrolysis reduction scavenging experiment Environmental technology. Sanitary engineering Longjiang Li verfasserin aut Yutao Zhang verfasserin aut In Water Science and Technology IWA Publishing, 2021 86(2022), 9, Seite 2106-2123 (DE-627)319406539 (DE-600)2024780-1 19969732 nnns volume:86 year:2022 number:9 pages:2106-2123 https://doi.org/10.2166/wst.2022.349 kostenfrei https://doaj.org/article/068ab170cba94aa297d62f95cd0248cf kostenfrei http://wst.iwaponline.com/content/86/9/2106 kostenfrei https://doaj.org/toc/0273-1223 Journal toc kostenfrei https://doaj.org/toc/1996-9732 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2360 GBV_ILN_4046 AR 86 2022 9 2106-2123 |
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10.2166/wst.2022.349 doi (DE-627)DOAJ02636588X (DE-599)DOAJ068ab170cba94aa297d62f95cd0248cf DE-627 ger DE-627 rakwb eng TD1-1066 Hongliang Chen verfasserin aut Novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; glucose m-cresol degradation peroxymonosulfate pyrolysis reduction scavenging experiment Environmental technology. Sanitary engineering Longjiang Li verfasserin aut Yutao Zhang verfasserin aut In Water Science and Technology IWA Publishing, 2021 86(2022), 9, Seite 2106-2123 (DE-627)319406539 (DE-600)2024780-1 19969732 nnns volume:86 year:2022 number:9 pages:2106-2123 https://doi.org/10.2166/wst.2022.349 kostenfrei https://doaj.org/article/068ab170cba94aa297d62f95cd0248cf kostenfrei http://wst.iwaponline.com/content/86/9/2106 kostenfrei https://doaj.org/toc/0273-1223 Journal toc kostenfrei https://doaj.org/toc/1996-9732 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2360 GBV_ILN_4046 AR 86 2022 9 2106-2123 |
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10.2166/wst.2022.349 doi (DE-627)DOAJ02636588X (DE-599)DOAJ068ab170cba94aa297d62f95cd0248cf DE-627 ger DE-627 rakwb eng TD1-1066 Hongliang Chen verfasserin aut Novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; glucose m-cresol degradation peroxymonosulfate pyrolysis reduction scavenging experiment Environmental technology. Sanitary engineering Longjiang Li verfasserin aut Yutao Zhang verfasserin aut In Water Science and Technology IWA Publishing, 2021 86(2022), 9, Seite 2106-2123 (DE-627)319406539 (DE-600)2024780-1 19969732 nnns volume:86 year:2022 number:9 pages:2106-2123 https://doi.org/10.2166/wst.2022.349 kostenfrei https://doaj.org/article/068ab170cba94aa297d62f95cd0248cf kostenfrei http://wst.iwaponline.com/content/86/9/2106 kostenfrei https://doaj.org/toc/0273-1223 Journal toc kostenfrei https://doaj.org/toc/1996-9732 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2360 GBV_ILN_4046 AR 86 2022 9 2106-2123 |
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10.2166/wst.2022.349 doi (DE-627)DOAJ02636588X (DE-599)DOAJ068ab170cba94aa297d62f95cd0248cf DE-627 ger DE-627 rakwb eng TD1-1066 Hongliang Chen verfasserin aut Novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; glucose m-cresol degradation peroxymonosulfate pyrolysis reduction scavenging experiment Environmental technology. Sanitary engineering Longjiang Li verfasserin aut Yutao Zhang verfasserin aut In Water Science and Technology IWA Publishing, 2021 86(2022), 9, Seite 2106-2123 (DE-627)319406539 (DE-600)2024780-1 19969732 nnns volume:86 year:2022 number:9 pages:2106-2123 https://doi.org/10.2166/wst.2022.349 kostenfrei https://doaj.org/article/068ab170cba94aa297d62f95cd0248cf kostenfrei http://wst.iwaponline.com/content/86/9/2106 kostenfrei https://doaj.org/toc/0273-1223 Journal toc kostenfrei https://doaj.org/toc/1996-9732 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2360 GBV_ILN_4046 AR 86 2022 9 2106-2123 |
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10.2166/wst.2022.349 doi (DE-627)DOAJ02636588X (DE-599)DOAJ068ab170cba94aa297d62f95cd0248cf DE-627 ger DE-627 rakwb eng TD1-1066 Hongliang Chen verfasserin aut Novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; glucose m-cresol degradation peroxymonosulfate pyrolysis reduction scavenging experiment Environmental technology. Sanitary engineering Longjiang Li verfasserin aut Yutao Zhang verfasserin aut In Water Science and Technology IWA Publishing, 2021 86(2022), 9, Seite 2106-2123 (DE-627)319406539 (DE-600)2024780-1 19969732 nnns volume:86 year:2022 number:9 pages:2106-2123 https://doi.org/10.2166/wst.2022.349 kostenfrei https://doaj.org/article/068ab170cba94aa297d62f95cd0248cf kostenfrei http://wst.iwaponline.com/content/86/9/2106 kostenfrei https://doaj.org/toc/0273-1223 Journal toc kostenfrei https://doaj.org/toc/1996-9732 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2360 GBV_ILN_4046 AR 86 2022 9 2106-2123 |
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novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol |
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Novel construction of the catalyst from red mud by the pyrolysis reduction of glucose for the peroxymonosulfate-induced degradation of m-cresol |
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Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; |
| abstractGer |
Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; |
| abstract_unstemmed |
Red mud of low cost is regarded as a promising alternative to heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade m-cresol. Improper valence states of metal oxides and coated active substances in red mud greatly hampered its wide application. To solve this problem, the modified red mud (WRMG/700) was prepared by the pyrolysis reduction of glucose in N2 atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectrum (XPS) analysis confirmed the production of Fe3O4, MnO and NiO in red mud and their gathering on the surface of particles. WRMG/700 exhibited the excellent performance toward PMS activation for the m-cresol degradation with 99.02% degradation efficiency and a pH-independent catalytic activity between initial pH 3–8. The removal efficiency of COD increased with the reaction time under the optimized degradation conditions. The free radical scavenging experiments and electron paramagnetic resonance (EPR) test confirmed 1O2 played a dominant role during m-cresol degradation in the WRMG/700/PMS system, implying m-cresol degradation was a non-radical oxidation process. Accordingly, the possible reaction mechanism was proposed. WRMG/700 retained its activation performance even after five recycles. This study showed a low cost and simple operation process for m-cresol elimination. HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.; |
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HIGHLIGHTS The washed red mud and glucose were annealed at 700 °C in N2 atmosphere and exhibited the excellent performance for m-cresol degradation (WRMG/700).; Fe3O4, MnO and NiO forming in WRMG/700 played a crucial role during m-cresol degradation.; WRMG/700 exhibited a pH-independent catalytic activity between initial pH 3–8.; WRMG/700 retained its activation performance even after five recycles.;</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">glucose</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">m-cresol degradation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">peroxymonosulfate</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">pyrolysis reduction</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">scavenging experiment</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Environmental technology. 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