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Fractionation factors for stable isotopes of N and O during N2O reduction in soil depend on reaction rate constant

Vieten, Beatrix and Blunier, Thomas and Neftel, Albrecht and Alewell, Christine and Conen, Franz. (2007) Fractionation factors for stable isotopes of N and O during N2O reduction in soil depend on reaction rate constant. Rapid communications in mass spectrometry, Vol. 21, H. 6. pp. 846-850.

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Official URL: http://edoc.unibas.ch/dok/A5249693

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Abstract

Nitrous oxide (N2O) is a major greenhouse gas that is mainly produced but also reduced bymicroorganisms in soils. We determined factors for N and O isotope fractionation during thereduction of N2O to N2 in soil in a flow-through incubation experiment. The absolute value ofthe fractionation factors decreased with increasing reaction rate constant. Reaction rates constantsranged from 1.7 10S4 sS1 to 4.5 10S3 sS1. The minimum, maximum and median of the observedfractionation factors were for N S36.0%, S1.0% and S9.3% and for O S74.0%, S6.9% and S26.3%,respectively. The ratio of O isotope fractionation to N isotope fractionation was 2.4W0.3 and itwas independent from the reaction rate constants. This leads us to conclude that fractionationfactors are variables while their ratio in this particular reaction might be a constant.
Faculties and Departments:05 Faculty of Science
05 Faculty of Science > Departement Umweltwissenschaften > Umweltgeowissenschaften > Umweltgeowissenschaften (Alewell)
UniBasel Contributors:Conen, Franz and Alewell, Christine
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Wiley
ISSN:1097-0231
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:24
Deposited On:22 Mar 2012 13:43

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