Activity Coefficients of Uranyl Nitrate and Nitric Acid in Aqueous Mixtures

Procedia Chemistry Pub Date : 2016-01-01 DOI:10.1016/j.proche.2016.10.013

Alexander Ochkin, Dmitry Gladilov, Sergey Nekhaevskiy, Alexey Merkushkin

引用次数: 5

Abstract

The activity coefficients of nitric acid and uranyl nitrate in in aqueous mixtures are necessary to model the system H₂O-HNO₃-UO₂(NO₃)₂-TBP-diluent. Three methods have been compared in this work to determine activity coefficients based on experimental data, Pitzer's equation or Zdanovskiy's rule. Acid activities have been calculated from the data of two first methods. These results were compared with the data of third method. Errors were about 3.3.%. Activity coefficients of uranyl nitrate γ_U as a function of concentration of uranyl nitrate and nitric acid were determined in 76 mixed solutions. The equation to calculate γ_U was proposed.

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硝酸铀酰和硝酸在水溶液中的活度系数

硝酸和硝酸铀酰在水溶液混合物中的活度系数是模拟H2O-HNO3-UO2(NO3)2- tbp稀释剂体系所必需的。本文比较了三种确定活度系数的方法，分别基于实验数据、Pitzer方程或Zdanovskiy规则。根据前两种方法的数据计算了酸活性。这些结果与第三种方法的数据进行了比较。错误率约为3.3%。测定了硝酸铀酰γU在76种混合溶液中的活度系数随硝酸铀酰和硝酸浓度的变化规律。提出了γ - u的计算公式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Procedia Chemistry

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