Investigating the adsorption of cesiun ion (Cs+) on cobalt hexacyanoferrate coated magnetite nanoparticles

Abstract

Co₂[Fe(CN)₆]/Fe₃O₄ nanoparticle adsorbent for ion cesium (Cs⁺) sorption was prepared by a chemical co-precipitation method. The magnetization of the materials makes them to be separated easyly from an aqueous solution by an external magnetic field. The ion Cs⁺ absorption by Co₂[Fe(CN)₆]/Fe₃O₄ nanoparticle follow the ion exchange mechanism, ion exchange capacity depends on the pH, the maximum ion exchange capacity of the material at pH = 4 is 0.40 meq (Cs⁺)/ g. After 15 min, about 98% of initial ion Cs⁺ concentration was removed from the solution, the adsorption could be described by Langmuir and Freundlich isotherms. The high adsorption capacity and good performance on other aspects, make the Co₂[Fe(CN)₆]/Fe₃O₄ nanoparticle a promissing adsorbent for the removal of ion Cs⁺ from water.