Mass Transfer of Organic Compounds in Dilute Aqueous Solutions into High Density Polyethylene Geomembranes
Publication: Journal of Environmental Engineering
Volume 130, Issue 2
Abstract
The mass transfer of ten organic compounds into high density polyethylene (HDPE) geomembranes is investigated using batch immersion tests with dilute aqueous organic compound solutions. For the concentration ranges tested, the linear model is suitable to explain the sorption of organic compounds. The HDPE-water (HDPE-W) partition coefficients of the organic compounds have a good logarithmic linear relationship with their octanol-water partition coefficients and water solubility. The diffusion coefficients of all organic compounds tested are on the order of and decrease with the increase in their molecular diameters. The effects of the presence of other organic compounds, pH, ionic strength, temperature, and five-year aging of HDPE geomembranes on sorption are evaluated. All factors except the temperature are insignificant. As temperature increase, values are not affected significantly, but values increase. A mathematical model, together with the experimentally determined mass transfer parameters, is used to predict the mass flux of organic compounds through HDPE geomembranes.
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Information
Published In
Journal of Environmental Engineering
Volume 130 • Issue 2 • February 2004
Pages: 175 - 183
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jul 24, 2002
Accepted: Apr 13, 2003
Published online: Jan 16, 2004
Published in print: Feb 2004
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