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Fractionation factors for stable isotopes of N and O during N2O reduction in soil depend on reaction rate constant
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 64202
Author(s) Vieten, Beatrix; Blunier, Thomas; Neftel, Albrecht; Alewell, Christine; Conen, Franz
Author(s) at UniBasel Conen, Franz
Alewell, Christine
Year 2007
Title Fractionation factors for stable isotopes of N and O during N2O reduction in soil depend on reaction rate constant
Journal Rapid communications in mass spectrometry
Volume 21
Number 6
Pages / Article-Number 846-50
Abstract Nitrous oxide (N2O) is a major greenhouse gas that is mainly produced but also reduced by microorganisms in soils. We determined factors for N and O isotope fractionation during the reduction of N2O to N-2 in soil in a flow-through incubation experiment. The absolute value of the fractionation factors decreased with increasing reaction rate constant. Reaction rates constants ranged from 1.7 10(-4)s(-1) to 4.5 10(-3)s(-1). The minimum, maximum and median of the observed fractionation factors were for N -36.0 parts per thousand, -1.0 parts per thousand and -9.3 parts per thousand and for 0 -74.0 parts per thousand -6.9 parts per thousand and -26.3 parts per thousand, respectively. The ratio of 0 isotope fractionation to N isotope fractionation was 2.4 +/- 0.3 and it was independent from the reaction rate constants. This leads us to conclude that fractionation factors are variables while their ratio in this particular reaction might be a constant. Copyright (c) 2007 John Wiley & Sons, Ltd.
Publisher Wiley
ISSN/ISBN 1097-0231
edoc-URL http://edoc.unibas.ch/dok/A5249693
Full Text on edoc No
Digital Object Identifier DOI 10.1002/rcm.2915
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/17294513
ISI-Number WOS:000244923600004
Document type (ISI) Article
 
   

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