Large sulfur isotope fractionation by bacterial sulfide oxidation.
Holm, Simon Agner
Crockford, Peter W
American Association for the Advancement of Science (AAAS)
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Pellerin, A., Antler, G., Holm, S. A., Findlay, A. J., Crockford, P. W., Turchyn, A. V., Jørgensen, B. B., & et al. (2019). Large sulfur isotope fractionation by bacterial sulfide oxidation.. Sci Adv, 5 (7), eaaw1480. https://doi.org/10.1126/sciadv.aaw1480
A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 (34 S) in the produced sulfate of +12.5 per mil or greater. This observation challenges the general consensus that the microbial oxidation of sulfide does not result in large 34 S enrichments and suggests that sedimentary sulfides and sulfates may be influenced by metabolic activity associated with sulfide oxidation. Since the DA-type sulfide oxidation pathway is ubiquitous in sediments, in the modern environment, and throughout Earth history, the enrichments and depletions in 34 S in sediments may be the combined result of three microbial metabolisms: microbial sulfate reduction, the disproportionation of external sulfur intermediates, and microbial sulfide oxidation.
Deltaproteobacteria, Sulfates, Sulfur Isotopes, Chemical Fractionation, Oxidation-Reduction, Metabolic Networks and Pathways
Natural Environment Research Council (NE/S001344/1)
External DOI: https://doi.org/10.1126/sciadv.aaw1480
This record's URL: https://www.repository.cam.ac.uk/handle/1810/296715
Attribution-NonCommercial 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc/4.0/