Effect of Dielectric Saturation on Ion Activity Coefficients in Ion Exchange Membranes.

ABSTRACT: Polymeric ion exchange membranes are used in water purification processes to separate ions from water. The distribution and transport of ionic species through these membranes depend on a variety of factors, including membrane charge density, morphology, chemical structure, and the specific ionic species present in the fluid. The electrical potential distribution between membranes and solutions is typically described using models based on Donnan theory. An extension of the original theory is proposed to account for the nonideal behavior of ions both in the fluid and in the membrane as well to provide a more robust description of interactions of solutes with fixed charge groups on the polymer backbone. In this study, the variation in dielectric permittivity in the membrane medium with electr

SUBMITTER: Paspureddi A 

PROVIDER: S-EPMC9453797 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature