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Dark oxidation of water in soils

S. Fleischer ; Lovisa Bauhn (Institutionen för kemi- och bioteknik, Kärnkemi) ; P. Fors ; Arvid Ödegaard-Jensen (Institutionen för kemi- och bioteknik, Kärnkemi)
Tellus Series B-Chemical and Physical Meteorology (0280-6509). Vol. 65 (2013),
[Artikel, refereegranskad vetenskaplig]

We report the release of oxygen (O-2) under dark conditions in aerobic soils. This unexpected process is hidden by respiration which constitutes the dominating reversal O-2 flux. By using (H2O)-O-18 in different soils, we confirmed that (OO)-O-16-O-18 and O-18(2) released under dark soil conditions originated from added (H2O)-O-18. Water is the only large-scale source of electrons for reduction of CO2 in soils, but it has not been considered as an electron donor because of the very strong oxidation system needed. A high share of soil inorganic material seems to favor the release of O-2.

Nyckelord: dark water oxidation, soil CO2 reduction, soil oxygen release, soil respiration

Article Number: 20490

Denna post skapades 2014-01-28.
CPL Pubid: 193171


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)



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