Dark oxidation of water in soils
Artikel i vetenskaplig tidskrift, 2013

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.

soil oxygen release

dark water oxidation

soil respiration

soil CO2 reduction


S. Fleischer

Hogskolan i Halmstad

Lovisa Bauhn

Chalmers, Kemi- och bioteknik, Kärnkemi

Patrik Fors

Vattenfall Research and Development AB

Arvid Ödegård Jensen

Chalmers, Kemi- och bioteknik, Kärnkemi

Tellus, Series B: Chemical and Physical Meteorology

0280-6509 (ISSN) 1600-0889 (eISSN)

Vol. 65