NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The anaerobic degradation of organic matter in Danish coastal sediments - Iron reduction, manganese reduction, and sulfate reductionA combination of porewater and solid phase analysis as well as a series of sediment incubations are used to quantify organic carbon oxidation by dissimilatory Fe reduction, Mn reduction, and sulfate reduction, in sediments from the Skagerrak (located off the northeast coast of Jutland, Denmark). Solid phase data are integrated with incubation results to define the zones of the various oxidation processes. At S(9), surface Mn enrichments of up to 3.5 wt pct were found, and with such a ready source of Mn, dissimilatory Mn reduction was the only significant anaerobic process of carbon oxidation in the surface 10 cm of the sediment. At S(4) and S(6), active Mn reduction occurred; however, most of the Mn reduction may have resulted from the oxidation of acid volatile sulfides and Fe(2+) rather than by a dissimilatory sulfate. Dissolved Mn(2+) was found to completely adsorb onto sediment containing fully oxidized Mn oxides.
Document ID
19940033473
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Canfield, Donald E.
(Georgia Inst. of Technology Atlanta, United States)
Thamdrup, BO
(NASA Headquarters Washington, DC United States)
Hansen, Jens W.
(Aarhus Univ. Denmark)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 57
Issue: 16
ISSN: 0016-7037
Subject Category
Geophysics
Accession Number
94A10128
Funding Number(s)
CONTRACT_GRANT: NAGW-3117
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available