Towards a mechanistic understanding of carbon stabilization in manganese oxides

@inproceedings{Johnson2015TowardsAM,
  title={Towards a mechanistic understanding of carbon stabilization in manganese oxides},
  author={Karen L. Johnson and Graham Purvis and Elisa L{\'o}pez-Cap{\'e}l and Caroline L. Peacock and Neil D. Gray and Thomas Wagner and Christian M{\"a}rz and Leon Bowen and Jesus Ojeda and Nina Finlay and Steve Robertson and Fred Worrall and Chris Greenwell},
  booktitle={Nature communications},
  year={2015}
}
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 (<550 °C… CONTINUE READING
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