The use of 13-C-labelled polyaromatic hydrocarbons in soil bound residue formation
- Universitaet Hamburg (Germany); and others
The formation of non-extractable residues during biodegradation and humification processes in soils and sediments represent a major sink for organic contaminants. We studied the mode of incorporation of polycyclic aromatic hydrocarbons (PAM) and their metabolites into macromolecular organic matter during microbial degradation applying {sup 13}C-labelled compounds. Mineralization rates were determined by measuring the {sup 13}CO{sub 2} production. An incorporation of {sup 13}C-PAH-fragments into humic material could be traced by isotopic analysis of the bulk organic matter. Furthermore, selective chemical degradation reactions were applied to analyze the precise chemical structure of covalently bound {sup 13}C-labelled PAH fragments in soil humic substances. Structural assignments by GC-MS combined with isotope measurements on the bulk organic carbon and the molecular level (IRM-GC-MS) provide useful information on the fate of xenobiotics within the soil. The results are discussed in the context of long-term risk assessment of bioremediated soils.
- OSTI ID:
- 437360
- Report Number(s):
- CONF-960807--
- Journal Information:
- National Meeting - American Chemical Society, Division of Environmental Chemistry, Journal Name: National Meeting - American Chemical Society, Division of Environmental Chemistry Journal Issue: 2 Vol. 36; ISSN 0270-3009; ISSN NMACDY
- Country of Publication:
- United States
- Language:
- English
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