Field-Scale Demonstration of PFAS Leachability Following In Situ Soil Stabilization
ACS Omega 2022 Volume 7, Issue 1, Pages 419 – 429
Several adsorbents were tested at bench-scale for their ability to immobilize PFAS in soil collected from a US site.
Based on the bench-scale trials, Rembind was 1 of only 2 adsorbents selected for further field scale trials.
Field-scale trials consisted of mixing the adsorbents in situ at various dosage rates simultaneously with Portland cement into a number of test pits at a US Government site.
Five separate monitoring events included two to three sample cores collected from each test pit for United States Environmental Protection Agency (USEPA) Method 1315 leaching assessment.
Bench-scale and field-scale data were in good agreement and demonstrated >99% decrease in total PFAS leachability as confirmed by the total oxidizable precursor assay, strongly supporting the chemical stabilization of PFAS.
To date, monitoring of the test pits shows that the immobilization is very stable for at least 2.5 years, which paves the way for the consideration of immobilization as a viable and sustainable PFAS soil remediation solution.