Abstract
SummaryIn an acid soil, amounts or organic carbon resistant to peroxidation with hydrogen peroxide were strongly related to the proportions of expandable phyllosilicate (vermiculite, smectite) in the clay fraction, as measured by its K2O content and cation exchange capacity. This was taken to indicate that a substantial part of the organic matter resistant to oxidation was interlayered. The organic compounds in the clay‐organic matter complexes were identified by Pyrolysis Field Ionization Mass Spectrometry (Py‐FIMS).Alkyl‐aromatics as well as carbohydrates, phenols, lignins, lipids and N‐compounds were found in the C‐horizon sample, whereas mainly alkyl‐aromatics and N‐compounds, more resistant to chemical oxidation, were associated with the A1 and Bw fine‐clay fraction. This was interpreted as being due either to the evolution of the clay‐associated compounds paralleling the mineralogical transformations, or to the selective adsorption of the more stable components.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
