Relationship of Soil Organic Matter Characteristics to Organic Contaminant Sequestration and Bioavailability
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 13C-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 sorptive reactivities of different types of soil/sediment organic matter with hydrophobic organic contaminants.
A. D. Lueking et al., "Relationship of Soil Organic Matter Characteristics to Organic Contaminant Sequestration and Bioavailability," Journal of Environmental Quality, vol. 29, no. 1, pp. 317-323, Alliance of Crop, Soil, and Environmental Science Societies (ACSESS), Jan 2000.
The definitive version is available at https://doi.org/10.2134/jeq2000.00472425002900010040x
Chemical and Biochemical Engineering
Keywords and Phrases
Desorption; Hydrophobicity; Impurities; Mathematical models; Nuclear magnetic resonance; Sediments; Soils; Sorption; Structure (composition); Microbial bioavailability; Organic contaminant; Phenantrene; Soil organic matter; Sorption-desorption hysteresis; Organic compounds; Adsorption; Article; Bioavailability; Carbon nuclear magnetic resonance; Chemical analysis; Soil pollution
International Standard Serial Number (ISSN)
Article - Journal
© 2000 Alliance of Crop, Soil, and Environmental Science Societies (ACSESS), All rights reserved.