Evaluation of ferrocyanide anion exchange resins regarding the uptake of Cs+ ions and their regeneration

Abstract

Ferrocyanide-anion exchange resin was prepared and the prepared ion exchange resins were tested on the ability to uptake Cs+ ion. The prepared ion exchange resins were resin-KCoFC, resin-KNiFC, and resin-KCuFC. The three tested ion exchange resins showed ion exchange selectivity on the Cs+ ion of the surrogate soil decontamination solution, and resin-KCoFC showed the best Cs+ ion uptake capability among the tested ion exchange resins. The ion exchange behaviors were explained well by the modified Dubinin-Polanyi equation. A regeneration feasibility study of the spent ion exchange resins was also performed by the successive application of hydrogen peroxide and hydrazine. The desorption of the Cs+ ion from the ion exchange resin satisfied the electroneutrality condition in the oxidation step; the desorption of the Fe2+ ion in the reduction step could also be reduced by adding the K+ ion.