Potential for Nonenzymeatic Reduction of Fe(III) vio Electron Shuttling in Subsurface Sediments

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IRON IN MICROBIAL METABOLISMS (2011, background): “Signifi cantly, Fe(III) reduction rates are faster in the presence of organic electron shuttles than in their absence because the organic shuttles are likely to be more accessible for microbial reduction than poorly soluble Fe(III) oxyhydroxides (Nevin and Lovley 2000).”
Microbial electrosynthesis — revisiting the electrical route for microbial production (2010, background): “In addition, primary metabolites of bacteria such as sulphur specie”
Review: microbial mechanisms of accessing insoluble Fe(III) as an energy source (2003, background): “However, when dialysis membrane experiments were performed with anthraquinone-2,6-disulfonate (AQDS), an electronshuttling compound, as a positive control, Fe(III) reduction was not observed (Nevin & Lovley 2000a).”
Fe(III)-mediated anaerobic ammonium oxidation: A novel microbial nitrogen cycle pathway and potential applications (2021, background): “…FeRB could use various substances (such as humic substances, anthraquinone-2, 6-disulfonate) as electron shuttles to facilitate the transfer of electrons from the microorganism to the extracellular electron acceptor (Nevin & Lovley, 2000b), which has also been demonstrated in Feammox process.”