||Transport of dissolved organics from dilute aqueous solutions through flexible membrane liners /
Haxo, Henry E.
||Matrecon, Inc., Alameda, CA.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
|| U.S. Environmental Protection Agency, Office of Research and Development, Risk Reduction Engineering Laboratory,
Barrier materials ;
Permeability, Earth fills ;
Organic wastes ;
Sanitary landfills ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||22 pages ; 28 cm
The paper presents the results of experiments relating to the partitioning of dissolved organics from dilute aqueous solutions to polymeric flexible membrane liners (FMLs) and their permeation through the liners. In order to simulate partitioning and the transport of waste constituents within and out of a landfill, two sets of experiments were performed. In the first set, samples of an FML that were either unexposed or saturated with an organic were placed in test liquids, including deionized water, neat organics, and saturated aqueous solutions of organics. In the second set, the partitioning of organics measured in a three-compartment closed apparatus. The results of the experiments show that, even at low concentrations in an aqueous solution, some organics can be highly absorbed by a polyethylene (PE) FML, reaching equilibrium concentrations in less than 120 hours. Trichloroethylene, toluene, and o-xylene migrated from the dilute aqueous solution and penetrated a PE FML barriers in as short a time as 24 hours after the experiment had begun.
Includes bibliographical references. "Reprint article published in Hazardous Waste & Hazardous Materials, vol. 5, no. 4, 1988." "Robert E. Landreth, project officer." "Contract no. 68-03-3213." Microfiche.