Abstract
Magnetic sorbent—calcium alginate containing potassium-cobalt hexacyanoferrate (CA-CoHCFe) is proposed in order to amend removal of the radioactive cesium(I)-137 and strontium(II)-85 ions from aqueous solutions using the recently proposed method (Fuks, 2018). Results obtained in present work show, that properly chosen magnetic core may increase removal of the aforementioned radiometals as compared with the proposed earlier calcium alginate–carbonyl iron (CA–CI). Using CA-CoHCFe instead of CA–CI increased the 40 % cesium removal to about 96 %. In addition, sorption of strontium(II) ions for both sorbents is fairly high and is about 80%. Technetium-99, radioactive element which is produced during operation of the nuclear reactors or being a byproduct of nuclear weapons explosions, may also appear in the liquid radioactive wastes. Presented work presents applicability of the method for removal of this dangerous metal ion from aqueous solutions.
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