Other
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.1619v&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 57, Issue 7, pp.1619-1623
Other
2
Scientific paper
Disproportionation of thiosulfate is an important pathway in bacterial energy metabolism in anoxic sediments. It has been described as an inorganic fermentation process in which a part of the molecule is oxidized to sulfate, while the other stoichiometrically equivalent part is used as electron acceptor and reduced to sulfide. However, an intramolecular redox change is difficult to envisage because, according to the currently held view, the two sulfur atoms of thiosulfate exist in the oxidation state of sulfate (+6) and sulfide (-2) and do not change their respective oxidation states upon disproportionation. Our results based on XANES spectroscopy indicate that the two different sulfur atoms in thiosulfate have charge densities corresponding to +5 and -1 oxidation states which support a redox mechanism in the disproportionation of thiosulfate to sulfate and sulfide.
Jeon Yiseul
Luther George W. III
Manowitz Bernard
Vairavamurthy Appathurai
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