Iron Corrosion via Direct Metal-Microbe Electron Transfer.

ABSTRACT: The concept that anaerobic microorganisms can directly accept electrons from Fe(0) has been controversial because direct metal-microbe electron transfer has previously only been indirectly inferred. Fe(0) oxidation was studied with Geobacter sulfurreducens strain ACL, an autotrophic strain that was previously shown to grow with electrons derived from a graphite cathode as the sole electron donor. Strain ACL grew with Fe(0) as the sole electron donor and fumarate as the electron acceptor. However, it appeared that at least a portion of the electron transfer was via H₂ produced nonenzymatically from the oxidation of Fe(0) to Fe(II). H₂, which accumulated in abiotic controls, was consumed during the growth of strain ACL, the cells were predominately planktonic, an

SUBMITTER: Tang HY 

PROVIDER: S-EPMC6520446 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature