Precipitation of uranium(VI) peroxide (UO4) in sodium perchlorate solution

Đogić, Renata; Cuculić, Vlado; Branica, Marko (2008) Precipitation of uranium(VI) peroxide (UO4) in sodium perchlorate solution. Croatica Chemica Acta, 78 (4). pp. 575-580. ISSN 0011-1643

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Abstract

Precipitation diagrams were constructed using the data obtained in experiments with direct mixing of uranyl ion ([UO2](2+)) and hydrogen peroxide. Three days after mixing the system, equilibrium was established in the [H2O2](tot) > [UO2](tot) concentration region, resulting in stability of the concentration boundary. From this boundary condition, the solubility product (K-sp = [UO22+] [O-2(2-)]) was defined. The mean value of the solubility product was (1.32 +/- 0.02) x 10(-36) mol dm(-3). From the solubility border, where equilibrium was established i.e., at [UO22+] = 1.4 x 10(-4) mol dm(-3), the heterogeneous distribution diagrams of uranyl species, including the solid phase, were calculated.

Item Type:	Article
Uncontrolled Keywords:	uranyl ion; hydrogen peroxide; uranium(VI) peroxide; precipitation; solubility product; nuclear-fuel; dissolution; radiolysis; water; H2O2
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division for Marine and Enviromental Research
Projects:	Project title Project leader Project code Project type Fizikalna i biogeo-kemija tragova metala u vodenim sustavima Ivanka Pižeta 0098121 MZOS
Depositing User:	Vlado Cuculić
Date Deposited:	31 Oct 2013 10:21
URI:	http://fulir.irb.hr/id/eprint/878

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