Phase Composition, Structure, and Hydrolytic Durability of a Uranium-Containing Magnesium Potassium Phosphate Compound

被引：1
|
作者：
Vinokurov S.E. [1 ]
Kulikova S.A. [1 ]
Belova K.Y. [1 ,2 ]
Rodionova A.A. [1 ]
Myasoedov B.F. [1 ]
机构：
[1] Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow
[2] Mendeleev University of Chemical Technology of Russia, Miusskaya pl. 9, Moscow
来源：
Radiochemistry | 2018年 / 60卷 / 06期
基金：
俄罗斯科学基金会;
关键词：
immobilization; leach rate; leaching mechanism; magnesium potassium phosphate compound; uranium;
D O I：
10.1134/S1066362218060139
中图分类号：
学科分类号：
摘要：
Uranium-containing samples of magnesium potassium phosphate (MPP) compound were synthesized using a nitric acid uranium solution. Uranium is incorporated in the MPP compound in the form of potassium uranyl phosphate with the structure of metaankoleite natural mineral, K(UO2)PO4·3H2O. The differential and integral uranium leach rates, determined in accordance with GOST (State Standard) R 52 126–2003 on the 28th day of contact of the compound with water, are 1.7 × 10–6 and 2.7 × 10–6 g cm–2 day–1, respectively, and the degree of leaching is 0.014%. High hydrolytic durability of the compound with respect to uranium leaching reduces the risk of release of uranium isotopes from radioactive waste into the environment. © 2018, Pleiades Publishing, Inc.
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页码：644 / 647
页数：3
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