Journal articles
Magnetic susceptibility as a proxy for investigating microbially mediated iron reduction
Abstract : We investigated magnetic susceptibility (MS) variations in hydrocarbon contaminated sediments. Our objective was to determine if MS can be used as an intrinsic bioremediation indicator due to the activity of iron-reducing bacteria. A contaminated and an uncontaminated core were retrieved from a site contaminated with crude oil near Bemidji, Minnesota and subsampled for MS measurements. The contaminated core revealed enriched MS zones within the hydrocarbon smear zone, which is related to iron-reduction coupled to oxidation of hydrocarbon compounds and the vadose zone, which is coincident with a zone of methane depletion suggesting aerobic or anaerobic oxidation of methane is coupled to iron-reduction. The latter has significant implications for methane cycling. We conclude that MS can serve as a proxy for intrinsic bioremediation due to the activity of iron-reducing bacteria iron-reducing bacteria and for the application of geophysics to iron cycling studies.
https://hal-insu.archives-ouvertes.fr/insu-00681303
Contributor : Pascale Talour <>
Submitted on : Thursday, March 11, 2021 - 4:22:51 PM
Last modification on : Monday, July 19, 2021 - 11:22:02 AM
Long-term archiving on: : Saturday, June 12, 2021 - 7:03:37 PM
Contributor : Pascale Talour <>
Submitted on : Thursday, March 11, 2021 - 4:22:51 PM
Last modification on : Monday, July 19, 2021 - 11:22:02 AM
Long-term archiving on: : Saturday, June 12, 2021 - 7:03:37 PM
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2011GL049271.pdf
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