Elimination of selected anions and cations from water by means of the Donnan dialysis

The usefulness of the Donnan dialysis has been assessed for the elimination of harmful (bromide, bromate and nitrate) or troublesome (calcium and magnesium) ions from water. The rate and efficiency of ion exchange were examined. For anion removal Selemion AM V or Neosepta ACS membranes were used while for cation removal - Neosepta CMX or Selemion CMV ones. The influence of membrane properties and salt concentration in the receiver was investigated.