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INFLUENCE OF GROUNDWATER CONDITIONS AND CO-CONTAMINANTS ON SORPTION OF PERFLUOROALKYL COMPOUNDS ON GRANULAR ACTIVATED CARBON
Siriwardena, D.P., M. Crimi, T.M. Holsen, C. Bellona, C. Divine, and E. Dickenson.
Remediation Journal 29(3):5-15(2019)

Sorption tests were conducted on several granular activated carbons (GACs) to determine which was most effective at sorbing PFOA and PFOS and whether different groundwater conditions affected sorption. PFOA and PFOS were tested alone and in the presence of co-contaminants (kerosene, TCE, and ethanol). The F400 GAC and coconut-based carbon (CBC) were most effective in preliminary PFAS sorption experiments. Sorption for PFOA and PFOS was higher alone than when present in the mixture. PFOS showed higher sorption than PFOA both individually and in the mixture. The presence of co-contaminants and variations in groundwater conditions had limited impact on the sorption of PFAS onto GAC under the experimental conditions tested.



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