Mathematical model of precipitation of barium and strontium nitrates from nitric acid solutions and their mutual effect

被引：2
|
作者：
Puzikov E.A. [1 ]
Mishina N.E. [1 ]
Zilberman B.Y. [1 ]
机构：
[1] Khlopin Radium Institute, 2-i Murinskii pr. 28, St. Petersburg
来源：
Radiochemistry | 2016年 / 58卷 / 5期
关键词：
barium nitrate; mathematical modeling; nitric acid; solubility; strontium nitrate;
D O I：
10.1134/S1066362216050052
中图分类号：
学科分类号：
摘要：
A mathematical model describing the solubility of barium, strontium, and lead nitrates in nitric acid solutions containing 0 to 14 M HNO3 in the temperature range from 0 to 90°С with the error no larger than 7% was developed. The model is based on the reactions of metal precipitation in the form of Me(NO3)2 at HNO3 concentrations of up to 7–8 M and Ме(NO3)2·2HNO3 at higher nitric acid concentrations, and also on the assumed formation of soluble metal nitrate complexes MeNO3 +. A sharp increase in the barium solubility at HNO3 concentrations lower than 0.5 M and temperatures of 50 and 90°С was interpreted assuming the possible formation of dimeric oxocations Ba2O2 + or associates Ba2(OH)2 2+. A model describing the solubility of barium nitrate in the presence of strontium nitrate in HNO3 solutions at HNO3 concentrations in the range from 0 to 5 M was also suggested. © 2016, Pleiades Publishing, Inc.
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页码：473 / 479
页数：6
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