Ion Separations Based on Spontaneously Arising Streaming Potentials in Rotating Isoporous Membranes.

ABSTRACT: Highly selective ion separations are vital for producing pure salts, and membrane-based separations are promising alternatives to conventional ion-separation techniques. Our previous work demonstrated that simple pressure-driven flow through negatively charged isoporous membranes can separate Li⁺ and K⁺ with selectivities as high as 70 in dilute solutions. The separation mechanism relies on spontaneously arising streaming potentials that induce electromigration, which opposes advection and separates cations based on differences in their electrophoretic mobilities. Although the separation technique is simple, this work shows that high selectivities are possible only with careful consideration of experimental conditions including transmembrane pressure, solution ionic s

SUBMITTER: Tang C 

PROVIDER: S-EPMC9227078 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature