Electrodialytic removal of H2SO4 from its aqueous mixture with Na2SO4

Abstract

The experimental results of the separation of sulfuric acid from sodium sulfate by the membrane electrolysis method have been presented. The anion-exchange membrane Neosepta ACM has been used. It has been found that the current efficiency of H2SO4 removal is similar for pure acid solution and for the mixture H2SO4-Na2SO4 if the initial acid concentrations are the same. For the same current density effectiveness of H2SO4 removal is higher for lower initial acid concentration (63% for 0.5 M and 56% for 1 M (j = 100 mA/cm2).