Rapid biotic molecular transformation of fulvic acids in a karst aquifer

Citation

Material Information

Title:
Rapid biotic molecular transformation of fulvic acids in a karst aquifer
Series Title:
Geochimica et Cosmochimica Acta
Creator:
Einsiedl, Florian
Hertkorn, Norbert
Wolf, Manfred
Frommberger, Moritz
Schmitt-Kopplin, Philippe
Koch, Boris P.
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Dissolved Organic Carbon ( local )
Doc ( local )
Refractory ( local )
Biotic Molecular Transformation ( local )
Fulvic Acids ( local )
Karst Aquifer ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
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 (∼60 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.
Original Version:
Geochimica et Cosmochimica Acta, Vol. 71, no. 22 (2007-11-15).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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University of South Florida
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