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In-Situ Stabilization of PFAS Contaminated Soils at Two Superfund Sites
Citation:
Bless, D., J. McKernan, Ed Barth, C. Acheson, M. Mills, M. Johnson, C. Su, D. Cutt, R. Henderek, S. Hartzell, K. Dasu, R. Iery, AND A. Dindal. In-Situ Stabilization of PFAS Contaminated Soils at Two Superfund Sites. NEHA 2019 Annual Educational Conference (AEC) & Exhibition, Nashville, Tennessee, July 09 - 12, 2019.
Impact/Purpose:
The overall objective was to identify a remediation approach with stabilizing agents that would be capable of immobilizing PFAS in the soil from these sites. This research was conducted as part of Engineering Technical Support Center activities under SHC project 3.61.1 through a FY18 RARE project with Region 2.
Description:
The overall objective of this laboratory scale research project was to identify a remediation approach with stabilizing agents that would be capable of immobilizing PFAS in two Superfund site soils. The project team evaluated both natural and commercially available PFAS stabilizing agents, as well as potentially developing a chemical formulation for a new stabilizing agent. The research involved three steps: 1) conduct laboratory isotherm/partitioning treatability study with up to four identified PFAS stabilizing agent formulations for two site-specific soil; 2) determine and document partitioning coefficients after treatment with the stabilizing agents to identify ‘best performing’ agents; and 3) conduct EPA’s SPLP leaching test on the ‘best performing’ agents for the common compounds (PFOA, PFOS, PFBA, PFBS, PFNA, and PFHxS) with potential sorbents such as activated carbon, biochar and commercial organoclay.