Abstract

A set of Pitzer parameters was obtained to accurately describe the thermodynamic properties of solutions in the H₂O–UO₂(NO₃)₂–Th(NO₃)₄–HNO₃ system at 25°С and represent the thermodynamic properties of liquid phases in the H₂O–Th(NO₃)₄–HNO₃ subsystem in the temperature range 25–50°С. Solubility products were calculated for crystal hydrates Th(NO₃)₄ · 6H₂O and UO₂(NO₃)₂ · 3H₂O to predict the solubilities of these compounds in those solutions over a wide concentration range.

中文翻译：

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H 2 O–HNO 3 –UO 2（NO 3）2 –Th（NO 3）4系统中的相和相平衡的热力学性质

摘要

获得了一组Pitzer参数，以准确描述H ₂ O–UO ₂（NO ₃）₂ –Th（NO ₃）₄ –HNO ₃系统在25°С下溶液的热力学性质，并表示液体的热力学性质。 H ₂ O–Th（NO ₃）₄ –HNO ₃子系统中的_两相在25–50°С温度范围内。计算了晶体水合物Th（NO ₃）₄ ·6H ₂ O和UO ₂（NO ₃）₂ ·3H _2的溶解度乘积O可以预测这些化合物在较宽浓度范围内在这些溶液中的溶解度。