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SUSTAINABLE REMOVAL OF POLY- AND PER-FLUOROALKYL SUBSTANCES (PFAS) FROM GROUNDWATER USING REGENERABLE ION EXCHANGE MEDIA AND ON-SITE DESTRUCTION OF PFAS BY PLASMA TREATMENT
Hagelin, N.
Emerging Contaminants Summit, 6-7 March 2018, Westminster, CO. Poster Presentation, 2018

Bench-scale column testing of five commercially available ion-exchange (IX) resin media, two regenerable and three non-regenerable, was conducted using groundwater contaminated with PFASs from aqueous film-forming foam during fire-fighter training. All five IX media removed PFASs, with non-regenerable media out-performing regenerable media. One of the regenerable materials—SORBIX A3F—was successfully regenerated and retained for pilot testing. Identical systems were designed for both synthetic media and GAC at pilot scale to treat groundwater with total PFAS concentrations of ~100 µg/L. The SORBIX A3F was regenerated and reused on site multiple times with negligible performance degradation. The regenerant residue was destroyed in a plasma reactor. Bench- and pilot-scale testing of IX resin for PFAS removal from groundwater suggests that the optimal IX solution depends on PFAS profile, PFAS concentration, and co-contaminants. See additional information in a slide presentation: https://www.azwater.org/resource/group/25c2bfe3-42d4-4cd3-9149-4911c8416e5e/Downloads/2016-11-09_Webinar/AZAWWA_PFAS_IX_Removal.pdf.



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