PFAS in Landfill Leachate

CHARACTERIZATION OF Perfluoroalkyl and polyfluoroalkyl substances (PFAS) IN LANDFILL LEACHATE AND PRELIMINARY EVALUATION OF LEACHATE TREATMENT PROCESSES

TAG Meetings

Meeting #1, January 26, 2018. Contact hmsolo@miami.edu for more details

PROPOSAL ABSTRACT

Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are fluorine-containing chemicals that are found in many products that are stick and stain resistant. The most studied of the PFAS are perfluorooctanoic acid (PFOA) which is used to make Teflon, and perfluorooctane sulfonate (PFOS), a breakdown product of a common water resistant chemical known as Scotchgard. Although used widely, only recently have their human health impacts been recognized. Studies have linked PFOA and PFOS to thyroid and liver diseases, diseases of the immune system, and cancer. Due to their wide ranging usage in consumer products, landfills represent a logical end-of-life reservoir for PFAS. The objectives of this study are to evaluate the concentrations of PFAS in leachates from Florida landfills and to assess the capacity of current treatments to remove PFAS from leachate. Leachate samples will be collected from landfills in the State of Florida and from the effluent of leachate treatment facilities. These samples are to be analyzed with LC-MS/MS for PFAS. Data on leachate volumes and treatment data will be consolidated for landfills in the State of Florida. From this literature information coupled with leachate measurements, a preliminary assessment will be made about the effectiveness of existing leachate treatment strategies in reducing PFOA and PFOS levels. In an effort to broadly assess the health risks associated with the PFAS, results from leachate measurements will be compared to the U.S. Environmental Protection Agency’s PFAS health advisory of 0.07 parts per billion. Results can be used by regulators to assess whether treatment systems are needed to remove PFAS from landfill leachates in Florida.

Progress Report #1, Submitted November 30, 2017