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REMOVAL OF PER- AND POLYFLUOROALKYL SUBSTANCES (PFASS) FROM CONTAMINATED GROUNDWATER USING GRANULAR ACTIVATED CARBON: A PILOT-SCALE STUDY WITH BREAKTHROUGH MODELING
Liu, C.J., D. Werner, and C. Bellona.
Environmental Science: Water Research & Technology [Published online prior to print]

Results from a 7-month pilot-scale granular activated carbon (GAC) system are presented in this study. The system treated a continuous source of PFAS-contaminated groundwater with four activated carbons: Calgon F400 and F600, and Norit GAC400 and GCN1240. Chain length-dependent breakthrough was generally observed for PFCAs and PFSAs, where shorter chain PFASs broke through faster than longer chain PFASs. All tested GACs performed similarly for weakly adsorbing shorter chain PFASs. F400 and GAC400 performed 40-50% better than F600 and GCN1240 for strongly adsorbing long chain PFASs.



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