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SEPARATION OP BERKELIUM (IV) FROM THIVALENT TRANS-PLUTONIUM ELEMENTS ON ION-EXCHANGEES IN SOLUTIONS OF PHOSPHORIC ACID

L. I. Guseva, V.V. Stepushkina, G.S. Tikhomirova

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Abstract

The dependences of Am, Cm, fik, Cf and Es behaviour on anion- and cation-exchangers in solutions of 0.1-8.0 M H3PO4, on acid concentration and oxidant content in solution (KBrO3.) or in resin (PbO2) have been studied. Significant differences in distribution coefficients of Bk and other transplutonium elements (TPE) have been found that can be explained by Bk oxidation to the tetravalent state. A simple and effective method of Bk(IV) separation from trivalent TPE has been developed. The method was applied to the isolation of isotopes Bk-249 and Bk-250; the purification factor of Bk(IV) from other TPE is 104-106per cycle. The possibility of Bk separation from bromate and phosphate ions by its sorption on a cation-exchanger from diluted H3PO4 solutions with subsequent desorption by the mineral acid has been shown.

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The dependences of Am, Cm, fik, Cf and Es behaviour on anion- and cation-exchangers in solutions of 0.1-8.0 M H3PO4, on acid concentration and oxidant content in solution (KBrO3.) or in resin (PbO2) have been studied. Significant differences in distribution coefficients of Bk and other transplutonium elements (TPE) have been found that can be explained by Bk oxidation to the tetravalent state. A simple and effective method of Bk(IV) separation from trivalent TPE has been developed. The method was applied to the isolation of isotopes Bk-249 and Bk-250; the purification factor of Bk(IV) from other TPE is 104-106per cycle. The possibility of Bk separation from bromate and phosphate ions by its sorption on a cation-exchanger from diluted H3PO4 solutions with subsequent desorption by the mineral acid has been shown.

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Available abstract

The dependences of Am, Cm, fik, Cf and Es behaviour on anion- and cation-exchangers in solutions of 0.1-8.0 M H3PO4, on acid concentration and oxidant content in solution (KBrO3.) or in resin (PbO2) have been studied. Significant differences in distribution coefficients of Bk and other transplutonium elements (TPE) have been found that can be explained by Bk oxidation to the tetravalent state. A simple and effective method of Bk(IV) separation from trivalent TPE has been developed. The method was applied to the isolation of isotopes Bk-249 and Bk-250; the purification factor of Bk(IV) from other TPE is 104-106per cycle. The possibility of Bk separation from bromate and phosphate ions by its sorption on a cation-exchanger from diluted H3PO4 solutions with subsequent desorption by the mineral acid has been shown.

Key concepts: Chemistry, Phosphoric acid, Plutonium, Sorption, Inorganic chemistry, Actinide, Ion exchange, Mineral acid

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SEPARATION OP BERKELIUM (IV) FROM THIVALENT TRANS-PLUTONIUM ELEMENTS ON ION-EXCHANGEES IN SOLUTIONS OF PHOSPHORIC ACID — Research Paper | ScholarLens