Degradation of atrazine by Bi2MoO6 activated peroxymonosulfate under visible light irradiation
Copyright © 2020 Elsevier B.V. All rights reserved..
In this study, bismuth molybdate (Bi2MoO6) nanosheets were prepared via a facile hydrothermal method and applied to activate peroxymonosulfate (PMS) for atrazine (ATZ) elimination under visible light irradiation. An effective photocatalytic synergy was observed in vis/Bi2MoO6/PMS system. The Bi2MoO6 catalyst showed an excellent stability and extremely low metal leaching in the vis/Bi2MoO6/PMS system which were characterized by XRD, XPS, HRTEM, SEM and FT-IR technologies. Besides, the influence of operation parameters (i.e., Bi2MoO6 dosage, PMS concentration, initial pH, ATZ concentration, co-existing anions, and humic acid) on the removal of ATZ were also investigated in detail. The best ATZ degradation efficiency (> 99 %) was obtained with Bi2MoO6 dosage of 0.6 g/L, PMS concentration of 0.8 mM, and ATZ concentration of 2.5 mg/L after 60 min. UV-vis DRS and Mott-Schottky analysis were taken to evaluate the band structure of Bi2MoO6. Trapping experiments and EPR detection demonstrated that superoxide radicals, hydroxyl radicals, sulfate radicals and h+ both contributed to ATZ degradation, of which hydroxyl radical OH) and h+ were the major species. Besides, the performance of vis/Bi2MoO6/PMS system for different pollutant removal was also investigated. Finally, the possible degradation products were monitored by UPLC-QTOF-MS/MS and the pathways of ATZ degradation were put forward. Overall, the vis/Bi2MoO6/PMS system shows the potential for the removal of organic pollutants in environmental remediation.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:400 |
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| Enthalten in: |
Journal of hazardous materials - 400(2020) vom: 05. Dez., Seite 123187 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Shen, Ziye [VerfasserIn] |
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| Links: |
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| Themen: |
Atrazine |
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| Anmerkungen: |
Date Completed 10.02.2021 Date Revised 10.02.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1016/j.jhazmat.2020.123187 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM311638589 |
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| 245 | 1 | 0 | |a Degradation of atrazine by Bi2MoO6 activated peroxymonosulfate under visible light irradiation |
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| 500 | |a Date Revised 10.02.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright © 2020 Elsevier B.V. All rights reserved. | ||
| 520 | |a In this study, bismuth molybdate (Bi2MoO6) nanosheets were prepared via a facile hydrothermal method and applied to activate peroxymonosulfate (PMS) for atrazine (ATZ) elimination under visible light irradiation. An effective photocatalytic synergy was observed in vis/Bi2MoO6/PMS system. The Bi2MoO6 catalyst showed an excellent stability and extremely low metal leaching in the vis/Bi2MoO6/PMS system which were characterized by XRD, XPS, HRTEM, SEM and FT-IR technologies. Besides, the influence of operation parameters (i.e., Bi2MoO6 dosage, PMS concentration, initial pH, ATZ concentration, co-existing anions, and humic acid) on the removal of ATZ were also investigated in detail. The best ATZ degradation efficiency (> 99 %) was obtained with Bi2MoO6 dosage of 0.6 g/L, PMS concentration of 0.8 mM, and ATZ concentration of 2.5 mg/L after 60 min. UV-vis DRS and Mott-Schottky analysis were taken to evaluate the band structure of Bi2MoO6. Trapping experiments and EPR detection demonstrated that superoxide radicals, hydroxyl radicals, sulfate radicals and h+ both contributed to ATZ degradation, of which hydroxyl radical OH) and h+ were the major species. Besides, the performance of vis/Bi2MoO6/PMS system for different pollutant removal was also investigated. Finally, the possible degradation products were monitored by UPLC-QTOF-MS/MS and the pathways of ATZ degradation were put forward. Overall, the vis/Bi2MoO6/PMS system shows the potential for the removal of organic pollutants in environmental remediation | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Atrazine | |
| 650 | 4 | |a Bi(2)MoO(6) | |
| 650 | 4 | |a Degradation intermediates | |
| 650 | 4 | |a Peroxymonosulfate | |
| 650 | 4 | |a Photocatalysis | |
| 700 | 1 | |a Zhou, Hongyu |e verfasserin |4 aut | |
| 700 | 1 | |a Pan, Zhicheng |e verfasserin |4 aut | |
| 700 | 1 | |a Guo, Yong |e verfasserin |4 aut | |
| 700 | 1 | |a Yuan, Yue |e verfasserin |4 aut | |
| 700 | 1 | |a Yao, Gang |e verfasserin |4 aut | |
| 700 | 1 | |a Lai, Bo |e verfasserin |4 aut | |
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| 773 | 1 | 8 | |g volume:400 |g year:2020 |g day:05 |g month:12 |g pages:123187 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1016/j.jhazmat.2020.123187 |3 Volltext |
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