Bioavailability Prediction of Polycyclic Aromatic Hydrocarbons in Field-Contaminated Sediment by Mild Extractions
Publication: Journal of Environmental Engineering
Volume 132, Issue 3
Abstract
Assessing the bioavailability of a group of polycyclic aromatic hydrocarbons (PAHs) coexisting in a field-aged contaminated sediment was examined using mild extractions by isopropanol- and ethanol-water solutions at concentrations of 5–100%, using extraction durations from . At a given solvent concentration, an initial rapid phase of PAH desorption was generally observed during the first , followed by a subsequent slower phase of desorption. A similar biphasic desorption was evident with increases in solvent concentration. PAH removal by various mild extractions was compared with PAH biodegradation by indigenous microorganisms. The removal of individual PAHs using 70% ethanol extraction was closely correlated to corresponding PAH removal via biodegradation, suggesting the possibility of using alcohol-water solution to simultaneously predict the bioavailability of multiple PAHs in aged sediments to indigenous microorganisms.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 132 • Issue 3 • March 2006
Pages: 384 - 391
Copyright
© 2006 ASCE.
History
Received: Sep 15, 2003
Accepted: May 23, 2005
Published online: Mar 1, 2006
Published in print: Mar 2006
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