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25℃下,用等压法测定了单盐水溶液(浓度范围分别为0.5—19.8mol·kg~(-1),0.3—6.0mol·kg~(-1))以及混合水溶液(离子强度范围为0.6—19.4mol·kg~(-1))的水活度和渗透系数,同时测定了LiCl的溶解度.该体系的实验等水活度线符合本工作推导出的Zdanovskii规则扩展式.用(Gibbs-Duhem方程和改进的Mckay-Perring方法计算了单盐和混合盐水溶液的潘度系数.由本实验获得的渗透系数拟合了Pitzer单盐和混合作用参数,检验了Pitzer方程对该体系渗透系数、活度系数和溶解度预测的适用性,用Pitzer方程取本工作得到的参数计算的溶解度与文献实验值基本一致.
The effects of single salt solution (concentration range of 0.5-19.8 mol · kg -1, 0.3-6.0 mol · kg -1) and mixed aqueous solution (ionic strength range: 0.6-19.4 mol · kg -1), and the solubility of LiCl was also determined.The experimental water activity curves of the system fit the Zdanovskii rule extension deduced in this work.Using Gibbs -Duhem equation and the modified Mckay-Perring method were used to calculate the Pond’s coefficient of single salt and mixed salt solution.The Pitzer equation was fitted by the permeability coefficient obtained in this experiment, and the Pitzer equation was used to test the permeability coefficient, Activity Coefficient and Solubility Prediction of the applicability of Pitzer equation to take the parameters obtained by this work calculated solubility and literature experimental values are basically the same.