Microbially mediated incorporation of {sup 14}C-PAHs into the organic carbon matrix of soils
- Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Environmental Sciences and Engineering
Microbial communities have been shown to enhance the incorporation of {sup 14}C-naphthalene, {sup 14}C-phenanthrene, and {sup 14}C-flouranthene in combined fractions of humic and fulvic acids; however, the type of association, its stability, and its effect on toxicity has not been fully assessed. Studies were conducted to explore the role of microorganisms in the degradation and immobilization of PAHs in soil. Incorporation of {sup 14}C-phenanthrene and {sup 14}C-pyrene into water soluble, organic matter, and fulvic and humic acid fractions of soil was measured in sterile and non-sterile soils over time. SEPHADEX columns and HPSEC (high performance size exclusion chromatography) profiles for each soil fraction were used to determine type of {sup 14}C-polycyclic aromatic hydrocarbons (PAHs) associations and distribution of {sup 14}C. {sup 14}C-PAH mineralization and changes in toxicity and mutagenicity were also assessed for soil fractions of both sterile and non-sterile soils at each time point. Incorporation of PAHs into the soil carbon matrix will most likely decrease the bio-availability of PAHs to soil, thus, reducing potential toxicity of PAHs to soil and terrestrial organisms.
- OSTI ID:
- 31761
- Report Number(s):
- CONF-9410273-; TRN: IM9517%%56
- Resource Relation:
- Conference: 15. annual meeting of the Society of Environmental Toxicology and Chemistry (SETAC), Denver, CO (United States), 30 Oct - 3 Nov 1994; Other Information: PBD: 1994; Related Information: Is Part Of Society of Environmental Toxicology and Chemistry 15th annual meeting: Abstract book. Ecological risk: Science, policy, law, and perception; PB: 286 p.
- Country of Publication:
- United States
- Language:
- English
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