Oxidation of green rust by anoxygenic phototrophic Fe(II)-oxidising bacteria
Xiaohua Han, Elizabeth J. Tomaszewski, Julian Sorwat, Yongxin Pan, Andreas Kappler, James M. Byrne
Abstract
Green rust (GR) may have been a primary mineral phase during the deposition of Fe(III) (oxyhydr)oxides in Precambrian iron formations (IFs). However, the transformation pathways of GR into secondary mineral phases in IFs remain unclear. One potentially relevant mechanism on early Earth is anoxygenic phototrophic microbial oxidation of either dissolved Fe(II) or Fe(II)-bearing minerals that leads to the formation of Fe(III) (oxyhydr)oxides. It is currently unknown whether phototrophic Fe(II)-oxidisers can access lattice Fe(II) in GR.
Topics & Concepts
Anoxygenic photosynthesisPhototrophBacteriaOxidizing agentChemistryBotanyBiologyOrganic chemistryGeneticsMicrobial Fuel Cells and BioremediationGeochemistry and Elemental AnalysisIron oxide chemistry and applications