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A review on the contribution of electron flow in electroactive wetlands: Electricity generation and enhanced wastewater treatment.

Authors
  • Srivastava, Pratiksha1
  • Abbassi, Rouzbeh2
  • Yadav, Asheesh Kumar3
  • Garaniya, Vikram1
  • Asadnia, Mohsen4
  • 1 Australian Maritime College, College of Sciences and Engineering, University of Tasmania, Launceston, 7248, Australia. , (Australia)
  • 2 School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, 2109, Australia. Electronic address: [email protected] , (Australia)
  • 3 Environment and Sustainability Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India. , (India)
  • 4 School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, 2109, Australia. , (Australia)
Type
Published Article
Journal
Chemosphere
Publication Date
Sep 01, 2020
Volume
254
Pages
126926–126926
Identifiers
DOI: 10.1016/j.chemosphere.2020.126926
PMID: 32957303
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

In less than a decade, bioelectrochemical systems/microbial fuel cell integrated constructed wetlands (electroactive wetlands) have gained a considerable amount of attention due to enhanced wastewater treatment and electricity generation. The enhancement in treatment has majorly emanated from the electron transfer or flow, particularly in anaerobic regions. However, the chemistry associated with electron transfer is complex to understand in electroactive wetlands. The electroactive wetlands accommodate diverse microbial community in which each microbe set their own potential to further participate in electron transfer. The conductive materials/electrodes in electroactive wetlands also contain some potential, due to which, several conflicts occur between microbes and electrode, and results in inadequate electron transfer or involvement of some other reaction mechanisms. Still, there is a considerable research gap in understanding of electron transfer between electrode-anode and cathode in electroactive wetlands. Additionally, the interaction of microbes with the electrodes and understanding of mass transfer is also essential to further understand the electron recovery. This review mainly deals with the electron transfer mechanism and its role in pollutant removal and electricity generation in electroactive wetlands. Copyright © 2020 Elsevier Ltd. All rights reserved.

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