Indirect determination of zeta potential at high ionic strength: Specific application to semipermeable polymeric membranes

摘要: The understanding of membrane charge neutralization and diffuse layer compression at environmentally relevant ionic strengths is becoming increasingly important. In this work, the impact high on zeta potential was determined using a combination streaming measurements theoretical modeling. Streaming were conducted cellulose triacetate (CTA) polyamide thin-film composite (TFC) membranes within operating limits an electrokinetic analyzer. Zeta calculated from then extrapolated to (0.05 1 M 1:1 electrolyte) Debye–Huckel Helmholtz-Smoluchowski models. Extrapolated values revealed that are limited by size hydrated counter-ions, full neutralization, or even reversal, can not be achieved. expected CTA similar TFC strength, which has considerable implications in comparison performance when treating brackish saline feed waters. methodologies developed work help better understand contribution electrostatic forces resulting sum interfacial present surface.