Evaluation of Indirect Thermal Desorption Coupled with Thermal Oxidation Technology to Treat Solid PFAS-Impacted Investigation-Derived Waste
Abstract
Previous studies have shown that thermal technology can reduce levels of per- and polyfluoroalkyl substances (PFAS) in soil, combust PFAS contained in commercial products, or mineralize PFAS-based industrial chemicals. However, uncertainties remain regarding ITD parameterization for application to treatment of specific PFAS-impacted waste as well as the destruction and removal efficiency (DRE) that can be achieved through off-gas treatment by thermal oxidation (TO). The overall objective of this study was to advance the current understanding of ITD/TOs effectiveness for the treatment of soil containing a typical suite of PFAS found in, but not limited to, aqueous film forming foam (AFFF) formulations manufactured and heavily utilized prior to 2002.A series of ten tests were conducted on sand spiked with PFAS at concentrations ranging from approximately 6,000 to 19,000 micrograms per kilogram (g/kg). Spiked feed soil samples and thermally treated soil samples were collected for each test run. Soil samples were collected in duplicate for each condition. Over 60 soil samples were collected. All soil samples were analyzed for PFAS using U.S. Environmental Protection Agency (EPA) Method 537 Liquid Chromatography/Tandem Mass Spectrometry. For the test runs spiked with AFFF, soil samples were also analyzed for Total Oxidizable Precursor Assay.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2020
- Accession Number
- AD1134384
Entities
People
- Frank Barranco
- George Hay
- Paul Caprio