Pyrene fate in surface soil microcosms
- Univ. of North Carolina, Chapel Hill, NC (United States)
Polycyclic aromatic hydrocarbons are ubiquitous products of natural and anthropogenic combustion processes. They are also common contaminants at hazardous waste sites. This study assessed the fate of pyrene in pristine and previously exposed soils. Pyrene was incubated with surface soils in 1 liter microcosms. The study was performed using soil samples collected from the first 10 cm of a pristine forest soil profile and from soil at a former wood treatment site contaminated with creosote. Microcosms were constantly aerated and soil moisture was maintained at approximately 25%. Variations in the partitioning of pyrene incubated with soil into methanol and methylene chloride extractions were measured over time. Hydroxypyrene was found to be an abiotic transformation product in pristine soil. Products were separated from the extracts by HPLC and identified by GC/MS and compared to authentic standards. After an extended period of adaptation, mineralization began in the pristine soils while metabolism in the previously exposed soil was immediate. Fractionation of soils containing {sup 14}C-pyrene quantified a fraction of label which was neither degraded nor extractable using conventional methods. The amount of label in this fraction was related to the amount of microbial metabolism of the pyrene.
- OSTI ID:
- 242393
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9626%%221
- Resource Relation:
- Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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