U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Search Result

| Return to Search | Return to Results |

IMMOBILIZATION OF PFASS USING ACTIVATED CARBON AND ALUMINUM HYDROXIDE
Birk, G.M. Emerging Contaminants Summit, March 1-2, 2016, Westminster, Colorado. 36 slides, 2016

Soils contaminated with per- and polyfluoroalkyl substances (PFASs) at two airport fire training grounds in Australia were used in an independent validation of the commercial immobilization product RemBind™, which contains mainly activated carbon and aluminum hydroxide and clay materials. The trials were independently supervised by an external party to ensure a high level of scrutiny. Soils were mixed with 5-20% RemBind (standard grade) or RemBind Plus (high grade), fixed for 48 hours, and then analyzed for 20 PFAS compounds at a commercial laboratory using the Toxicity Characterization Leaching Procedure. Selected samples were further analyzed using U.S. EPA Method 1320 (multiple extraction procedure) as an indication of long-term binding stability. Results showed that RemBind treatment reduced the soil leachability of PFOS from 37 µg/L (site 1) and 341 µg/L (site 2) below 0.3 µg/L. For PFASs in aqueous media, PerfluorAd introduction followed by RemBind polishing provides an innovative treatment process. In pretreatment, liquid PerfluorAd active compound is metered into a stirring tank to precipitate PFASs. Precipitation products are separated from the water as micro-flocs by processes such as sedimentation and filtration. The precipitants can be concentrated to a very high degree, which allows for economical disposal. A downstream RemBind filter treats the residual contaminants. Owing to the significant reduction in the PFAS contaminant load in the PerfluorAd stage (up to 90%) the absorbent filter lifetime is extended significantly.
Presentation slides: http://www.contaminantssummit.com/images/presentations/1_GaryBirk.pdf
PerfluorAd poster: http://www.umsicht.fraunhofer.de/content/dam/umsicht/de/dokumente/pressemitteilungen/2012/120110-poster-pft-en.pdf



The Technology Innovation News Survey welcomes your comments and suggestions, as well as information about errors for correction. Please contact Michael Adam of the U.S. EPA Office of Superfund Remediation and Technology Innovation at adam.michael@epa.gov or (703) 603-9915 with any comments, suggestions, or corrections.

Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.