A new dual temperature ion-exchange method for concentration and separ
ation of solutes, the ''swinging wave'' method, was described. The met
hod can be used for the reactant-free enrichment of solutions in micro
components. The effectiveness of the method applied to the enrichment
of bromides in sea water on a highly basic anion-exchange resin was de
monstrated, and technological characteristics of this process were stu
died using computer simulation and experimental studies.