10.1021/es2022329.s001
Julian Bosch
Julian
Bosch
Keun-Young Lee
Keun-Young
Lee
Guntram Jordan
Guntram
Jordan
Kyoung-Woong Kim
Kyoung-Woong
Kim
Rainer U. Meckenstock
Rainer U.
Meckenstock
Anaerobic, Nitrate-Dependent
Oxidation of Pyrite Nanoparticles
by <i>Thiobacillus denitrificans</i>
American Chemical Society
2012
mass balance
ferric iron
pyrite oxidation
Thiobacillus denitrificansPyrite
nitrate reduction
anaerobically oxidize
sulfur
Pyrite Nanoparticles
Thiobacillus denitrificans
biogeochemical cycles
Nanosized pyrite
putatively nanosized pyrite particle fraction
electron acceptor
Recent reports
2012-02-21 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Anaerobic_Nitrate_Dependent_Oxidation_of_Pyrite_Nanoparticles_by_i_Thiobacillus_denitrificans_i_/2548036
Pyrite is a key mineral in the global biogeochemical
cycles of
sulfur and iron, yet its anaerobic microbial oxidation has eluded
geochemists and microbiologists for decades. Recent reports indicated
that anaerobic oxidation of pyrite is occurring, but the mechanism
remains unclear. Here, we provide evidence for the capability of <i>Thiobacillus denitrificans</i> to anaerobically oxidize a putatively
nanosized pyrite particle fraction with nitrate as electron acceptor.
Nanosized pyrite was readily oxidized to ferric iron and sulfate with
a rate of 10.1 μM h<sup>–1</sup>. The mass balance of
pyrite oxidation and nitrate reduction revealed a closed recovery
of the electrons. This substantiates a further “missing lithotrophy”
in the global cycles of sulfur and iron and emphasizes the high reactivity
of nanominerals in the environment.