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Towards a mechanistic understanding of carbon stabilization in manganese oxides

Author

Listed:
  • Karen Johnson

    (School of Engineering and Computing Sciences, Durham University)

  • Graham Purvis

    (School of Civil Engineering and Geosciences, Devonshire Walk, Newcastle University)

  • Elisa Lopez-Capel

    (School of Agriculture, Food and Rural Development, Newcastle University)

  • Caroline Peacock

    (Earth Surface Science Institute, School of Earth and Environmental Sciences, University of Leeds)

  • Neil Gray

    (School of Civil Engineering and Geosciences, Devonshire Walk, Newcastle University)

  • Thomas Wagner

    (School of Civil Engineering and Geosciences, Devonshire Walk, Newcastle University)

  • Christian März

    (School of Civil Engineering and Geosciences, Devonshire Walk, Newcastle University)

  • Leon Bowen

    (Durham University)

  • Jesus Ojeda

    (Experimental Techniques Centre, Institute of Materials and Manufacturing, Brunel University)

  • Nina Finlay

    (School of Engineering and Computing Sciences, Durham University)

  • Steve Robertson

    (School of Engineering and Computing Sciences, Durham University)

  • Fred Worrall

    (Durham University)

  • Chris Greenwell

    (Durham University)

Abstract

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 (

Suggested Citation

  • Karen Johnson & Graham Purvis & Elisa Lopez-Capel & Caroline Peacock & Neil Gray & Thomas Wagner & Christian März & Leon Bowen & Jesus Ojeda & Nina Finlay & Steve Robertson & Fred Worrall & Chris Gree, 2015. "Towards a mechanistic understanding of carbon stabilization in manganese oxides," Nature Communications, Nature, vol. 6(1), pages 1-11, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8628
    DOI: 10.1038/ncomms8628
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