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...

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Bibliographic Details
Published in:	Journal of environmental quality Vol. 29; no. 1; pp. 317 - 323
Main Authors:	Lueking, Angela D., Huang, Weilin, Soderstrom‐Schwarz, Sara, Kim, Minsun, Weber, Walter J.
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Madison, WI American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America 01-01-2000 Crop Science Society of America American Society of Agronomy
Subjects:	Applied sciences Bioavailability Biological and physicochemical properties of pollutants. Interaction in the soil BIOLOGICAL AVAILABILITY Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics ENVIRONMENTAL SCIENCES ENVIRONMENTAL TRANSPORT Exact sciences and technology Organic contaminants ORGANIC MATTER PHENANTHRENE Pollution Pollution, environment geology Soil and sediments pollution SOIL CHEMISTRY Soil organic matter SOILS SORPTION Biodegradation Organic matter Phenanthrene Hydrocarbon Pollutant behavior Shale Property of soil Hydrophobic compound Desorption Bioavailability Polycyclic aromatic compound Soil pollution Sediments Peat Sorption Soil interaction Kinetics Hysteresis
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Summary:	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.
Bibliography:	W. Huang, present address: School of Environmental Science, Engineering, and Policy, Drexel Univ., Philadelphia, PA 19104 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0047-2425 1537-2537
DOI:	10.2134/jeq2000.00472425002900010040x