Coprecipitation of {sup 152}Eu with Iron(III) hydroxide formed upon reduction of sodium ferrate(VI) in aqueous medium
- St. Petersburg State Agricultural Univ. (Russian Federation)
The results are presented on coprecipitation of {sup 152}Eu with iron(III) hydroxide formed either upon hydrolysis of Fe(III) sulfate or upon spontaneous reduction of sodium ferrate(VI) (Na{sub 4}FeO{sub 5}) by water with pH variation from 2.5 to 12 and constant ionic strength I=1. Iron(III) hydroxide formed according to the second mechanism has more developed surface and coprecipitates with Eu{sup 3+} more efficiently, especially when concentration of Fe(III) is low({approx}1.2 mg 1{sup -1} or 2.2x10{sup -5} M). Introduction of oxalate ions (C=6.7x10{sup -4} M) into the solution inhibits the coprecipitation of Eu{sup 3+}; however, oxalate is readily oxidized by ferrate ion, which in this case additionally favors sorption using ferrate. Tentative data on coprecipitation of {sup 242}Pu and {sup 241}Am with Fe(OH){sub 3} produced from ferrate are presented. The data obtained show that sodium ferrate may be useful for decontamination of liquid radioactive wastes, because only ozone is a stronger oxidant than sodium ferrate (among common oxidants) and sodium ferrate is one of the best coagulating agents.
- OSTI ID:
- 160278
- Journal Information:
- Radiochemistry, Vol. 37, Issue 4; Other Information: PBD: Jul-Aug 1995; TN: Translated from Radiokhimiya; 37: No. 4, 359-362(1995)
- Country of Publication:
- United States
- Language:
- English
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