“…The relatively low rejection of low-MW PFASs can be attributed to the low operating permeate flux (5 L/m 2 h) in the submerged filtration orientation, in which a limited transmembrane pressure (TMP) of approximately 100 kPa was available. The low PFAS rejection at the low permeate flux was presumably caused by the low permeate volume per unit time against a near-constant solute flux for any permeate volume ( Ma et al, 2024 ; Wijmans and Baker, 1995 ). In fact, the rejection of PFOAs, PFHxSs, and PFOSs at a high permeate flux of 40 L/m 2 /h (88 %–94 %) was higher than that observed at the low permeate flux of 5 L/m 2 /h (79 %–90 %) ( Fig.…”