title: Adsorption and hydraulic conductivity of landfill-leachate perfluorinated compounds in bentonite barrier mixtures.
abstract: Perfluorinated compounds (PFCs) are leached in landfills from a wide range of domestic and industrial products. Sodium bentonite, a common barrier material, was contacted with water and landfill leachate spiked with PFCs in batch adsorption tests to measure PFC adsorption. Leaching cell tests were also conducted in which water, landfill leachate and PFC-spiked leachate permeated through compacted sand-bentonite mixtures. It was found that the PFCs did not bind substantially to the bentonite. Hydraulic conductivities were not appreciably affected by the PFCs, showing that bentonite liners are not affected for the range of concentrations tested. The sand-bentonite mixture partially retained the PFCs, indicating limited effectiveness in containing PFC within landfills.
authors: Department of Civil Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, BC V6T 1Z4, Canada.
authors: Belinda
authors: B
authors: Li
authors: Department of Civil Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, BC V6T 1Z4, Canada. Electronic address: lli@civil.ubc.ca.
authors: Loretta Y
authors: LY
authors: Li
authors: Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada.
authors: John R
authors: JR
authors: Grace
mesh_terms: D000327:Adsorption; D001546:Bentonite / Q000737:chemistry*; D010416:Pentachlorophenol / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry; D064091:Waste Disposal Facilities; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000517:prevention & control*
chemical_list: D014874:Water Pollutants, Chemical; D001546:Bentonite; D012822:Silicon Dioxide; D010416:Pentachlorophenol
keywords: Batch adsorption test; Bentonite; Landfill leachate; Leaching cell test; Perfluorinated compounds