Dark oxidation of water in soils

Siegfried Fleischer; Lovisa Bauhn; Patrik Fors; Arvid ÖDegaard-Jensen

doi:10.3402/tellusb.v65i0.20490

Dark oxidation of water in soils

Tellus B: Chemical and Physical Meteorology

Volume 65 (2013): Issue 1

By: Siegfried Fleischer, Lovisa Bauhn, Patrik Fors and Arvid ÖDegaard-Jensen

Open Access

|Jan 2013

Abstract

We report the release of oxygen (O₂) under dark conditions in aerobic soils. This unexpected process is hidden by respiration which constitutes the dominating reversal O₂ flux. By using H₂ ¹⁸O in different soils, we confirmed that ¹⁶O¹⁸O and ¹⁸O₂ released under dark soil conditions originated from added H₂ ¹⁸O. 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 O₂.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusb.v65i0.20490 | Journal eISSN: 1600-0889

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Language: English

Page range: 20490 - 20490

Submitted on: Jan 23, 2013

Accepted on: Nov 19, 2013

Published on: Jan 1, 2013

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

Keywords:

dark water oxidation,

soil CO₂ reduction,

soil oxygen release,

soil respiration

© 2013 Siegfried Fleischer, Lovisa Bauhn, Patrik Fors, Arvid ÖDegaard-Jensen, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 65 (2013): Issue 1