Method for the preparation of an ion exchanger for cesium ions a

Details Method for the preparation of an ion exchanger for cesium ions a Method for the preparation of an ion exchanger for cesium ions a

1995-11-13

1997-02-11

Phasge, Arun S.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210670, 521 25, 521 26, 521 28, 521 30, F23G 700

Patent

active

056017227

ABSTRACT:
Proposed is a method for the preparation of an efficient ion exchanger useful for separation and recovery of cesium ions from an aqueous solution such as strongly acidic waste solutions containing radioactive species of cesium. The method comprises the steps of (a) adsorption of hexacyanoferrate (II) ions on to porous particles of an anion exchange resin, (b) conversion of the hexacyanoferrate (II) ions into water-insoluble copper salt thereof in situ in the resin pores, (c) an oxidation treatment of the resin particles and (d) a reduction treatment in the presence of potassium ions followed by contacting of the resin particles with an aqueous solution containing copper ions. A method for the regeneration of the ion exchanger after adsorption of cesium ions is also proposed.

REFERENCES:
patent: 4628837 (1986-12-01), More et al.
patent: 5489370 (1996-02-01), Lomasney et al.

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