Chitosan-ferrocyanide sorbents for concentrating Cs-137 from seawater

Chitosan-ferrocyanide sorbents (CFS) based on ferrocyanides Ni-K, Cu-K and Zn-K for concentrating Cs-137 from the seawater have been obtained. Sorbent CFS Zn-K can be used in sorption-regeneration cycle using 5M solution of NH4NO3 as eluent. In dynamic condition sorption efficiency of Cs-137 and elution for the CFS Zn-K exceeds 95%. Two-staged scheme of Cs-137 concentrating from seawater is suggested. First stage – removal of radionuclide from Accepted Manuscript 2 seawater by CFS Zn-K sorbent, second stage – sorption of Cs-137 from eluate by CFS Ni-K sorbent.