Regeneration of FeII/FeIIIcomplex from NO chelating absorption by microbial fuel cell
Abstract Ferrous chelates ($ Fe^{II} $EDTA) can effectively absorb NO, but the regeneration of them usually consumes large amounts of organic matter or energy. In this study, a new approach to regenerate NO absorbed ferrous chelates with simultaneous electricity generation was investigated by a microbial fuel cell (MFC). The performance and mechanisms of $ Fe^{II} $EDTA regeneration were evaluated in the cathode of MFC reactor with and without the presence of microorganisms (referring to biocathode and abiotic cathode), respectively. It was found that $ Fe^{II} $EDTA-NO and $ Fe^{III} $EDTA could be used as the cathode electron acceptors in MFC. Low pH (pH = 5) was beneficial to electricity generation and $ Fe^{III} $EDTA/$ Fe^{II} $EDTA-NO reduction by the abiotic cathode. The biocathode performed better in electricity generation and $ Fe^{II} $EDTA regeneration, and achieved a $ Fe^{III} $EDTA reducing rate of 0.34 $ h^{−1} $ and a $ Fe^{II} $EDTA-NO reducing rate of 0.97 L $ mmol^{−1} $ $ h^{−1} $, which are much higher that than those for the abiotic cathode (0.23 $ h^{−1} $ for $ Fe^{III} $EDTA, 0.44 L $ mmol^{−1} $ $ h^{−1} $ for $ Fe^{II} $EDTA-NO). This was likely because the activation polarization loss and over cathode potential were reduced as a result of the catalytic activity of NO and iron reducing bacteria..
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:26 |
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| Enthalten in: |
Environmental science and pollution research - 26(2019), 19 vom: 10. Mai, Seite 19540-19548 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Qiang [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
EDTA |
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| Anmerkungen: |
© Springer-Verlag GmbH Germany, part of Springer Nature 2019 |
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| doi: |
10.1007/s11356-019-05291-y |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
OLC2040553118 |
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| 520 | |a Abstract Ferrous chelates ($ Fe^{II} $EDTA) can effectively absorb NO, but the regeneration of them usually consumes large amounts of organic matter or energy. In this study, a new approach to regenerate NO absorbed ferrous chelates with simultaneous electricity generation was investigated by a microbial fuel cell (MFC). The performance and mechanisms of $ Fe^{II} $EDTA regeneration were evaluated in the cathode of MFC reactor with and without the presence of microorganisms (referring to biocathode and abiotic cathode), respectively. It was found that $ Fe^{II} $EDTA-NO and $ Fe^{III} $EDTA could be used as the cathode electron acceptors in MFC. Low pH (pH = 5) was beneficial to electricity generation and $ Fe^{III} $EDTA/$ Fe^{II} $EDTA-NO reduction by the abiotic cathode. The biocathode performed better in electricity generation and $ Fe^{II} $EDTA regeneration, and achieved a $ Fe^{III} $EDTA reducing rate of 0.34 $ h^{−1} $ and a $ Fe^{II} $EDTA-NO reducing rate of 0.97 L $ mmol^{−1} $ $ h^{−1} $, which are much higher that than those for the abiotic cathode (0.23 $ h^{−1} $ for $ Fe^{III} $EDTA, 0.44 L $ mmol^{−1} $ $ h^{−1} $ for $ Fe^{II} $EDTA-NO). This was likely because the activation polarization loss and over cathode potential were reduced as a result of the catalytic activity of NO and iron reducing bacteria. | ||
| 650 | 4 | |a NO absorption | |
| 650 | 4 | |a MFC | |
| 650 | 4 | |a Fe | |
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| 650 | 4 | |a Fe | |
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| 700 | 1 | |a Yu, Keyan |4 aut | |
| 700 | 1 | |a Yi, Peng |4 aut | |
| 700 | 1 | |a Cao, Weimin |4 aut | |
| 700 | 1 | |a Chen, Xueping |4 aut | |
| 700 | 1 | |a Zhang, Xiaolei |4 aut | |
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