Cited by 95Microbial Fuel Cells and BioremediationEnzyme-mediated dye degradationAdvanced oxidation water treatment

The DOI matches its Crossref record; 39 of the 40 references it cites were found in a registry or an index.

Degradation of Azo Dye (Acid Orange 7) in a Microbial Fuel Cell: Comparison Between Anodic Microbial-Mediated Reduction and Cathodic Laccase-Mediated Oxidation

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Mani, Priyadharshini, Fidal, V. T., Bowman, Kyle, Breheny, Mark, Chandra, T. S., Keshavarz, Taj, Kyazze, Godfrey·2019·Frontiers in Energy Research

Abstract

More than 80 per cent of wastewater from industries is discharged into receiving water bodies without any pollution control. Microbial fuel cells (MFCs) are a promising technology for the simultaneous treatment of wastewater and electricity production. With regard to azo-dye containing wastewater (e.g. from textile manufacturing), the dye may be fed via the anode chamber containing electrochemically active bacteria or via the cathode chamber containing laccase enzyme as catalyst for oxygen reduction. This study investigated which of the two approaches is the best with regard to rate of decolourization of the dye (Acid orange 7), COD reduction and electricity production. The power density was higher for the MFCDye cathode (50±4 mW m-2, COD reduction 80.4±1.2%) compared with 42.5±2.6 mW m-2 (COD reduction 69±2%) for MFCDye anode. The time required for decolourization was longer in the MFCDye anode (Shewanella oneidensis) where only 20% decolourization was obtained after 24 h compared to 80% for the MFCDye cathode. The anodic dye degradation products were unstable when exposed to air resulting in regaining of colour. In case of degradation by laccase in the cathode chamber, the decolourization products were stable and simpler in chemical structure as determined by GC-MS. This work suggests that feeding azo dyes in cathode chambers of MFCs containing laccase is a better way of treating the dyes compared to the commonly used approach of feeding the dye in the anode chamber provided enzyme activity can be sustained.

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Crossref · 10.3389/fenrg.2019.00101

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  • In azo dyes, the first step in discolouration is splitting of the -N=N- bond, resulting in two asymmetric intermediate products.

    “In the three works, it was identified that in azo dyes, the first step in the discolouration is the splitting of the bond -N=N-, which results in obtaining two asymmetric intermediate products (Figure 4), [289,290,291].”

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Metadata

Authors
Mani, P., Fidal, V. T., Bowman, K., Breheny, M., Chandra, T. S., Keshavarz, T., & Kyazze, G.
Affiliations
  • University of Westminster (GB)
  • Indian Institute of Technology Madras (IN)
Corresponding author
  • Mani, Priyadharshini
  • Kyazze, Godfrey
Venue
Frontiers in Energy Research
Published
2019-09-18
Volume
7
ISSN
2296-598X (ISSN-L)
OpenAlex
W2911418705
Cited by
89
References
40
Citations by year
2026: 8 · 2025: 11 · 2024: 12 · 2023: 9 · 2022: 24 · 2021: 15 · 2020: 9 · 2019: 1
FWCI
5.19
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Energy Research (publishedVersion, cc-by)
  • WestminsterResearch (University of Westminster) (acceptedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › Microbial Fuel Cells and Bioremediation
  • Life Sciences › Immunology and Microbiology › Applied Microbiology and Biotechnology › Enzyme-mediated dye degradation
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
Keywords
microbial fuel cells, azo dye degradation, Acid Orange 7, laccase, electrochemically active bacteria, Shewanella oneidensis, color removal, textile wastewater, cathode chamber, anode chamber, COD removal, power density, dye degradation products

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