Suppression of phosphorus release from eutrophic lake sediments by sediment microbial fuel cells

Sediment microbial fuel cells (SMFCs) have served as an alternative technique to suppress phosphorus release from lake sediments to water bodies and thus mitigate eutrophication. However, the phosphorus regulation mechanism remains unclear. The purpose of this research was to understand the electroc...

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Veröffentlicht in:Environmental technology. - 1993. - 43(2022), 17 vom: 03. Juli, Seite 2581-2589
1. Verfasser: Takemura, Yasuyuki (VerfasserIn)
Weitere Verfasser: Syutsubo, Kazuaki, Kubota, Keiichi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Sediment microbial fuel cells electrochemical effect eutrophic lake phosphorus sediment remediation Water Pollutants, Chemical Water 059QF0KO0R Phosphorus 27YLU75U4W
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520 |a Sediment microbial fuel cells (SMFCs) have served as an alternative technique to suppress phosphorus release from lake sediments to water bodies and thus mitigate eutrophication. However, the phosphorus regulation mechanism remains unclear. The purpose of this research was to understand the electrochemical influence of an SMFC on the phosphorus concentration in interstitial water. In this study, a lab-scale SMFC was applied to acetate-spiked sediments (ace+) and unspiked sediments (sed) with closed-circuit (CC)/open-circuit (OC) columns, and the circuitry was switched to investigate the relationship between electron transfer and phosphorus concentration. The dissolved total phosphorus (DTP) concentration in the sediment interstitial water in CC columns significantly decreased to below 0.1 mg/L, whereas the DTP in OC columns remained high for nine weeks. After switching the circuit, the DTP in OC→CC columns dropped but that in CC→OC columns increased within one week. At the end of the experimental period, the DTP concentrations in CC/sed, CC/ace+, OC/sed, and OC/ace+ columns were 0.10 ± 0.02, 0.03 ± 0.00, 0.82 ± 0.01, and 1.66 ± 0.12 mg/L, respectively. The respective estimated anode capacitances of those columns were 2.05 ± 0.49, 5.15 ± 0.14, 0.72 ± 0.19, and 0.71 ± 0.12 nF. We concluded that the phosphorus may have been electrochemically attracted and retained on the anode in the sediment because the adsorbed DTP contents and the increased anode capacitances were strongly correlated. Thus, SMFCs can be used for suppressing phosphorus release from eutrophic lake sediments 
650 4 |a Journal Article 
650 4 |a Sediment microbial fuel cells 
650 4 |a electrochemical effect 
650 4 |a eutrophic lake 
650 4 |a phosphorus 
650 4 |a sediment remediation 
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650 7 |a Water  |2 NLM 
650 7 |a 059QF0KO0R  |2 NLM 
650 7 |a Phosphorus  |2 NLM 
650 7 |a 27YLU75U4W  |2 NLM 
700 1 |a Syutsubo, Kazuaki  |e verfasserin  |4 aut 
700 1 |a Kubota, Keiichi  |e verfasserin  |4 aut 
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856 4 0 |u http://dx.doi.org/10.1080/09593330.2021.1890837  |3 Volltext 
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