Redox mediator as cathode modifier for enhanced degradation of azo dye in a sequential dual chamber microbial fuel cell-aerobic treatment process

Journal article

Khan, Mohammad Danish, Thimmappa, Ravikumar, Anwer, Abdul Hakeem, Khan, N., Tabraiz, Shamas, Li, Da, Khan, Mohammad Zain and Yu, Eileen Hao 2021. Redox mediator as cathode modifier for enhanced degradation of azo dye in a sequential dual chamber microbial fuel cell-aerobic treatment process. International Journal of Hydrogen Energy. 46 (79), pp. 39427-39437. https://doi.org/10.1016/j.ijhydene.2021.09.151
AuthorsKhan, Mohammad Danish, Thimmappa, Ravikumar, Anwer, Abdul Hakeem, Khan, N., Tabraiz, Shamas, Li, Da, Khan, Mohammad Zain and Yu, Eileen Hao
AbstractThe electron transfer from cathode to azo dye Acid Blue 29 (AB29) using thionine (TH) and anthraquinone-2-sulfonate (AQS) redox mediators were investigated in dual chamber microbial fuel cells (DCMFCs). More than 90% of color was removed using electropolymerized TH (192 h) and AQS (264 h) cathodes. Chemical oxygen demand (COD) removal after anaerobic treatment in cathode chamber of TH-MFC, AQS-MFC and unmodified-MFC were 76.6 ± 1.7, 70.8 ± 2.5 and 18.3 ± 2.9%, respectively, which increased to 85.4 ± 1.5, 79.8 ± 3 and 20.6 ± 2.1%, respectively, after aerobic post treatment. Gas chromatography–mass spectrometry (GC–MS) investigations revealed the formation of aromatic amines in DCMFCs which were further degraded into low molecular-weight products in the aerobic post treatment. Electrochemical impedance spectroscopic (EIS) analysis showed lowest charge transfer resistance of TH-cathode which increased the electrochemical reactions and electron transfer rates. These results indicated that AB29 can be efficiently degraded by utilizing modified cathode based DCMFC-aerobic post treatment process along with bioelectricity generation.
KeywordsRedox mediator; Electron transfer; Cathodes
Year2021
JournalInternational Journal of Hydrogen Energy
Journal citation46 (79), pp. 39427-39437
PublisherElsevier
ISSN0360-3199
Digital Object Identifier (DOI)https://doi.org/10.1016/j.ijhydene.2021.09.151
Official URLhttps://www.sciencedirect.com/science/article/abs/pii/S0360319921037046
FunderNERC
EPSRC
Commonwealth Scholarship Commission United Kingdom
Publication dates
Online03 Nov 2021
Publication process dates
Accepted18 Sep 2021
Deposited31 Jan 2025
Output statusPublished
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https://repository.canterbury.ac.uk/item/8z81x/redox-mediator-as-cathode-modifier-for-enhanced-degradation-of-azo-dye-in-a-sequential-dual-chamber-microbial-fuel-cell-aerobic-treatment-process

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