Activated carbon can remove some, but not all [0]. > part from the commonly studied perfluoroocta noic acid (PFOA or C8) and perfluorooctane sulfo

Activated carbon can remove some, but not all [0]. > part from the commonly studied perfluoroocta noic acid (PFOA or C8) and perfluorooctane sulfonate (PFOS), eight additiona l PFASs were evaluated: perfl uorobutanoic acid (C4), perfluoro- pentanoic acid (C5), perfluorohexanoic acid (C6), perfluoroheptanoic acid (C7), perfluorononanoic acid (C9), perfluorodecanoic acid (C10), perfluorobutane sulfonate (PFBS), and perfluorohexane sulfonate (PFHS). > Regardless of the test ed (S-)PAC, C4 removal was negligible, while PFOS removal was essentially complete. PFAS removal increased with increasing perfluorinated carbon chain length, and for a given perfluorinated carbon chain length, sulfonates were more adsorbable than carboxylat es. tl;dr: long-chain PFAS are removed, while short-chain PFAS are hardly removed at all [0] http://www.waterrf.org/ExecutiveSummaryLibrary/4344_ProjectSummary.pdf http://www.waterrf.org/ExecutiveSummaryLibrary/4344_ProjectS...