Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1002/(SICI)1520-667X(1998)10:5<401::AID-MCS3>3.0.CO;2-K
Titel (primär) Pyrolysis pattern of anthropogenic and natural humic organic matter
Autor Poerschmann, J.; Kopinke, F.-D.; Balcke, G.; Mothes, S.
Journal / Serie Journal of Microcolumn Separations
Erscheinungsjahr 1998
Band/Volume 10
Heft 5
Seite von 401
Seite bis 411
Sprache englisch
Abstract Thermodesorbates (350°C) and pyrolyzates (750°C) of anthropogenic and natural humic organic matter (HOM) were identified and quantified by microcolumn gas chromatography–mass spectrometry (GC/MS) and gas chromatography-atomic emission detection (GC/AED). After thermal treatment, HOM leaves a highly carbonaceous residue (>90 wt % C) with about one-third the mass of the total HOM. As a first approximation, this value applies for various humic and fulvic acids independent of their origin. Only 30–40% of the volatilized carbon [10–13% of the total organic carbon (OC)] carries structural information. The residual volatile carbon is assigned to light gases (CO, CO2, CH4). Moreover, the aromatic compounds in the pyrolyzate may be misleading: they can be derived from aromatic building blocks of the HOM network or can be formed from nonaromatic precursors by thermal reactions. Nevertheless, even the relatively small fraction of OC in pyrolysis products with diagnostic value can be used to characterize HOM from different sources. Heterocyclic compounds and benzenediols are important markers of anthropogenic HOM. Thermochemolysis using tetramethyl ammonium hydroxide (TMAH) makes it possible to reveal the pattern of fatty acids and dicarboxylic acids but does not dramatically enhance the yield of the GC-detectable pyrolyzate
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Poerschmann, J., Kopinke, F.-D., Balcke, G., Mothes, S. (1998):
Pyrolysis pattern of anthropogenic and natural humic organic matter
J. Microcolumn Sep. 10 (5), 401 - 411