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Title (Primary) Iron corrosion by methanogenic archaea characterized by stable isotope effects and crust mineralogy
Author Tamisier, M.; Schmidt, M.; Vogt, C.; Kümmel, S.; Stryhanyuk, H.; Musat, N.; Richnow, H.-H.; Musat, F.
Journal Environmental Microbiology
Year 2022
Department ISOBIO
Volume 24
Issue 2
Page From 583
Page To 595
Language englisch
Topic T7 Bioeconomy
Supplements https://sfamjournals.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1111%2F1462-2920.15658&file=emi15658-sup-0001-supinfo.docx
Keywords corrosion, methanogenic archaea, methane, stable isotopes, fractionation factors, corrosion crust, mineralogy, crust conductivity
UFZ wide themes ProVIS;
Abstract Carbon and hydrogen stable isotope effects associated with methane formation by the corrosive archaeon Methanobacterium strain IM1 were determined during growth with hydrogen and iron. Isotope analyses were complemented by structural, elemental and molecular composition analyses of corrosion crusts. During growth with H2, strain IM1 formed methane with average δ13C of −43.5‰ and δ2H of −370‰. Corrosive growth led to methane more depleted in 13C, with average δ13C ranging from −56‰ to −64‰ during the early and the late growth phase, respectively. The corresponding δ2H were less impacted by the growth phase, with average values ranging from −316 to −329‰. The stable isotope fractionation factors, α13CCO2/CH4, were 1.026 and 1.042 for hydrogenotrophic and corrosive growth, respectively. Corrosion crusts formed by strain IM1 have a domed structure, appeared electrically conductive, and were composed of siderite, calcite, and iron sulfide, the latter formed by precipitation of sulfide (from culture medium) with ferrous iron generated during corrosion. Strain IM1 cells were found attached to crust surfaces and encrusted deep inside crust domes. Our results may assist to diagnose methanogens-induced corrosion in the field, and suggest that intrusion of sulfide in anoxic settings may stimulate corrosion by methanogenic archaea via formation of semi-conductive crusts.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24779
Tamisier, M., Schmidt, M., Vogt, C., Kümmel, S., Stryhanyuk, H., Musat, N., Richnow, H.-H., Musat, F. (2022):
Iron corrosion by methanogenic archaea characterized by stable isotope effects and crust mineralogy
Environ. Microbiol. 24 (2), 583 - 595