Na^+,K^+,Mg^(2+)/NO_3^-,Cl^-,SO_4^(2-)-H_2O体系25℃热力学模型和溶解度预测 Ⅰ:六元体系所需的Pitzer参数

Thermodynamic Model and Prediction of Solubilities in the System Na^+,K^+,Mg^(2+)/NO_3^-,Cl^-,SO_4^(2-)-H_2O at 298.16K Ⅰ.Pitzer Parameters for the System

在致力于Clegg-Pitzer模型和局部组成模型及其温度效应的研究基础,进一步结合含硝酸盐混合电解质溶液热力学的实验和理论研究,深入探讨了Pitzer模型对Na+,K+,Mg2+/Cl-,SO42-,NO3--H2O体系的适用性和各种应用。

In order to model thermodynamic properties and predict the solubilities of Na^＋ , K^＋ , Mg^2＋ /NO3^-, Cl^-,SO4^2- -H2O system using the Pitzer ion-interaction approach, Pitzer pararneters for nitrates NANO3, KNO3, Mg（NO3 ）2 are necessary. They were given for concentration up to 6 mol in the original papers of Pitzer and co-workers. Thermodynamics data sources of nitrates and their evaluation are described in details. New sets of Pitzer parameters for the three nitrates are presented in this paper.