Thermal Treatment of PFAS Impacted Soil – Field Demonstration and Scale-Up Considerations
Chris Blundy, Technical Sales Lead, TRS Group, Inc.
Soils contaminated by per- and polyfluoroalkyl substances (PFAS) present a unique challenge because the options for treatment are extremely limited. Excavation and off-site disposal/treatment is problematic because the liability for the PFAS contaminants present in soil, and off-site treatment options are uncertain. Even thermal destruction in soil burners may be problematic due to the potential formation of byproducts. Laboratory-scale thermal treatment studies using PFAS-impacted solids at temperatures between 350 and 400oC have shown great promise; all 28 targeted PFAS compounds were effectively removed to near non-detect concentrations. This finding is consistent between studies performed by the TRS Group, Jacobs Engineering, and Kruger. To date, no field-scale demonstrations of thermal treatment of PFAS-impacted soils have been completed. Eielson AFB in Alaska has approximately 150,000 cubic yards of PFAS-laden soils stored in 52 above-grade piles. With funding from ESTCP, a small pile was treated on site in 2021. Activities included:
B.S Geology 20 years at TRS Group, Inc. Technical Sales