Weak electricigens: A new avenue for bioelectrochemical research

Lucinda E. Doyle, Enrico Marsili

Research output: Contribution to journalReview articlepeer-review

32 Citations (Scopus)

Abstract

Electroactivity appears to be a phylogenetically diverse trait independent of cell wall classification, with both Gram-negative and Gram-positive electricigens reported. While numerous electricigens have been observed, the majority of research focuses on a select group of highly electroactive species. Under favorable conditions, many microorganisms can be considered electroactive, either through their own mechanisms or exogenously-added mediators, producing a weak current. Such microbes should not be dismissed based on their modest electroactivity. Rather, they may be key to understanding what drives extracellular electron transfer in response to transient limitations of electron acceptor or donor, with implications for the study of pathogens and industrial bioprocesses. Due to their low electroactivity, such populations are difficult to grow in bioelectrochemical systems and characterise with electrochemistry. Here, a critical review of recent research on weak electricigens is provided, with a focus on the methodology and the overall relevance to microbial ecology and bioelectrochemical systems.

Original languageEnglish
Pages (from-to)354-364
Number of pages11
JournalBioresource Technology
Volume258
DOIs
Publication statusPublished - Jun 2018
Externally publishedYes

Keywords

  • Bioelectrochemistry
  • Biofilms
  • Electricigens
  • Extracellular electron transfer
  • Microbial fuel cells

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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