Re:Toxic fluorinated compounds found in drinking water of 33...
by trendia on Monday January 30, 2017 @06:19PM
(#13526004)
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
> 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_ProjectS...