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| Titel |
A mathematical model for estimating the reactivity of marine organic matter via measured oxidant consumption rates |
| VerfasserIn |
K. Lettmann, B. B. Jørgensen, A. Khalili |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021954
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| Zusammenfassung |
| We present a mathematical model with which the reactivity of organic matter in marine
sediments can be estimated from consumption rates of the oxidants (e.g. O2, SO42-)
used by bacteria for the degradation process. In the classical approach, a first order
rate constant is determined which best fits the degredation of organic matter and
which is used to characterize the reactivity of the organic material Berner (1964).
More sophisticated, Boudreau and Ruddick (1991) considered the organic matter
to be composed out of an ’infinite’ number of fractions with different first order
reactivities. Their so called reactive continuum model is the basis for our classification
procedure.
Our method is tested with measured sulfate reduction rates from different study
sides. With these depth profiles and measured sediment accumulation rates we
determine the reactivity distribution of the organic material reaching the sediment
surface.
Furthermore, this reactive continuum model is helpful with another problem. In several
studies, it was demonstrated by Bo Barker J |
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