Membrane transport of Organics.III.Permeation of some carboxylic acids through bipolar polymer membrane

摘要

The permeation of acetic (AA), propionic (PA), lactic (LA), oxalic (OA), citric (CA), and tartaric (TA) acids through the bipolar ion-exchange membrane Neosepta BP-1 (Tokuyama Corp.) was studied. It was found that the fluxes (J, mol cm2 s’) and mass-transfer coefficients (k, cm s’) increase in the following order: CA < QA < LA < TA < PA S AA. The transport processes in the Neosepta BP-1 membrane are concentration~dependent and can be described phenomenolOgilZallY using 1-Fick’s law for diffusion. The permeation phenomena correspond to the solution—diffusion model similarly as to the permeation of carboxylic acids t’hroug’h sironjly exchange membraue~5. Hawever~ rn ct~mpc~ti