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Einsiedl, F. ; Hertkorn, N. ; Wolf, M. ; Frommberger, M. ; Schmitt-Kopplin, P. ; Koch, B.P.*

Rapid biotic molecular transformation of fulvic acids in a karst aquifer.

Geochim. Cosmochim. Acta 71, 5474-5482 (2007)
DOI
Open Access Green as soon as Postprint is submitted to ZB.
The study of molecular transformation processes of dissolved organic carbon (DOC) in the environment significantly contributes to a better understanding of the global biogeochemical organic matter cycle. In an oxic karst groundwater system, in which the most powerful abiotic DOC degradative reactions, photodegradation and metal-mediated redox chemistry, are at best marginal contributors, a near complete turnover of fulvic acids (FAs) has been observed within decades (not, vert, similar60 years). Depletion of oxygen for a very extensive range of aliphatic and aromatic carbon chemical environments has been confirmed as well as the formation of novel classes of compounds, suggesting a major contribution from biotic processes. From these results we infer that FAs must be perceived as a rather active participant in the global carbon cycle. Molecular-level alterations of such magnitude and rapidity on such short-time scales ought to be considered as widespread in the processing of “refractory” DOC in the environment.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
ISSN (print) / ISBN 0016-7037
e-ISSN 1872-9533
Journal Geochimica et Cosmochimica Acta
Quellenangaben Volume: 71, Issue: 22, Pages: 5474-5482 Article Number: , Supplement: ,
Publisher Elsevier
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Groundwater Ecology (IGOE)
Institute of Ecological Chemistry (IOEC)