Remediation Of AFFF-Impacted Groundwater Using Novel Cyclodextrin Adsorbent (DEXSORB®)

The use of aqueous film-forming foam (AFFF) has led toper- and polyfluoroalkyl substances (PFAS) impacting groundwaterthroughout the United States. To remediate PFAS-impacted groundwater, treatment technologies capable of high capacity PFAS sorption from water and concentration of PFAS waste for efficient processing by available destruction technologies are required to ensure full elimination of PFAS waste streams. Conventional adsorption technologies used to remove PFAS from water typically involve single-use granular activated carbon (GAC) or strong anion exchange resins (IXR) that result in large volumes of PFAS-laden solid waste. Cyclopure developed a novel DEXSORB® adsorbent, made with renewable -cyclodextrins, with high capacity to sorb PFAS from water. Importantly, spent DEXSORB media can be desorbed under ambient conditions providing complete recovery and concentration of extracted PFAS. The objective of this project is to demonstrate the effectiveness of a DEXSORB packed-bed filtration (PBF) system for high capacity PFAS sorption, followed by desorption and concentration of PFAS waste, in a pilot-scale pump-and-treat system of AFFF-impacted groundwater at a designated DoD site.