Activity Coefficients of Uranyl Nitrate and Nitric Acid in Aqueous Mixturesстатья
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Дата последнего поиска статьи во внешних источниках: 26 марта 2018 г.
Аннотация:The activity coefficients of nitric acid and uranyl nitrate in mixed solutions are necessary to model the system H2O-HNO3-UO2(NO3)2-TBP-diluent. There are tree methods of the activity coefficient determination: a) through the experimental data, b) through Pitzer’s equation and c) through Zdanovskiy’s rule. Acid activities have been calculated from the data of two first methods. This results were compared with the data of third method. Errors were about 3.3.%. Activity coefficients of uranyl nitrate γU as a function of concentration of uranyl nitrate and nitric acid were determined in 76 mixed solutions. The equation to calculate γU was proposed.