Relationship of soil organic matter characteristics to organic contaminant sequestration and bioavailability
Journal Article
·
· Journal of Environmental Quality
Sorption and desorption equilibria of phenanthrene with respect to three different types of geosorbents were measured, as were the rates of desorption and biological mineralization of this representative hydrophobic organic contaminant. The chemical nature of the organic matter associated with each geosorbent was characterized using solid state {sup 13}C-NMR spectrometry. The results of these studies reveal that both the desorption behavior and the microbial bioavailability of the sorbed contaminant are influenced by the physicochemical character of the organic matter. The more reduced and condensed the organic matter, the greater the extent of sorption-desorption hysteresis, the slower the desorption rate, and the less readily bioavailable the sorbed contaminant. These observations are consistent with projections predicated on a dual reactive domain model introduced earlier to describe the sorption reactivities of different types of soil/sediment organic matter with hydrophobic organic contaminants.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (US)
- OSTI ID:
- 20075835
- Journal Information:
- Journal of Environmental Quality, Journal Name: Journal of Environmental Quality Journal Issue: 1 Vol. 29; ISSN JEVQAA; ISSN 0047-2425
- Country of Publication:
- United States
- Language:
- English
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