Characterization of copper hexacyanoferrate(II) and (III) with reference to their use as cesium adsorbers

Removal of radioactive caesium from low level radioactive waste (LLW) streams using cobalt ferrocyanide impregnated organic anion exchanger

“…Anion exchanger beads of size −16 + 25 ASTM mesh were first converted into ferrocyanide form. For this 5 g anion 6 on the anion exchanger. The Co 2 Fe(CN) 6 loaded resin was then washed with distilled water to free it from excess cobalt nitrate, filtered and dried.…”

“…For this 5 g anion 6 on the anion exchanger. The Co 2 Fe(CN) 6 loaded resin was then washed with distilled water to free it from excess cobalt nitrate, filtered and dried. The removal of excess electrolyte was ensured by checking the washings for the presence of ferrocyanide ions using cobalt nitrate solution, and vice versa.…”

“…1 g samples of exchanger powder were equilibrated with 25 ml of RLLW waste for 1 h. The pH of the solution was adjusted, using dilute nitric acid or sodium hydroxide as required, to the required value (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). The supernatant solution was filtered and analysed for 137 Cs activity using NaI(Tl) scintillation counter.…”

“…It is well known that transition metal ferrocyanides are selective for Cs uptake [5][6][7][8] and a great number of them have been studied for their prospective use in the separation of radioactive Cs from nuclear waste streams [9,10]. One of the most promising Cs selective ferrocyanide is Potassium cobalt ferrocyanide [11,12].…”

Synergistic combination of metal oxide adsorbents for enhanced fouling control and metal removal in a submerged membrane adsorber

“…Additionally, they were able to sorb metals effectively only within a limited pH range of 6-9. Transition metal ferrocyanides exhibit a large sorption capacity (distribution coefficient¼2.94 Â 10 3 L/g) as well as a high selectivity for Cs ions over the wide pH range of 2-10 [23][24][25]. However, these species are too fine to be separated by gravity.…”