Towards a mechanistic understanding of carbon stabilization in manganese oxides

Minerals stabilize organic carbon (OC) in sediments, thereby directly affecting global climate at multiple scales, but how they do it is far from understood. Here we show that manganese oxide (Mn oxide) in a water treatment works filter bed traps dissolved OC as coatings build up in layers around cl...

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Bibliographic Details
Published in:Nature communications 2015-07, Vol.6 (1), p.7628-7628, Article 7628
Main Authors: Johnson, Karen, Purvis, Graham, Lopez-Capel, Elisa, Peacock, Caroline, Gray, Neil, Wagner, Thomas, März, Christian, Bowen, Leon, Ojeda, Jesus, Finlay, Nina, Robertson, Steve, Worrall, Fred, Greenwell, Chris
Format: Article
Language:English
Subjects:
140/146
704/106/47
Carbon
Fourier transforms
Humanities and Social Sciences
Molecular weight
multidisciplinary
Polymerization
Science
Science (multidisciplinary)
Sediments
Spectrum analysis
Water treatment
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Summary:Minerals stabilize organic carbon (OC) in sediments, thereby directly affecting global climate at multiple scales, but how they do it is far from understood. Here we show that manganese oxide (Mn oxide) in a water treatment works filter bed traps dissolved OC as coatings build up in layers around clean sand grains at 3%w/wC. Using spectroscopic and thermogravimetric methods, we identify two main OC fractions. One is thermally refractory (>550 °C) and the other is thermally more labile (
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms8628