多元电解质溶液表面张力的新型预测方程

A novel predictive equation for the surface tensions of mixed electrolyte solutions

将半理想溶液理论和Butler方程相结合建立了预测多元电解质溶液表面张力的新型线性预测方程.新方程可由二元系数据预测多元系的表面张力数据,而不涉及任何多元交互作用参数.利用不同温度下24个混合电解质溶液的表面张力数据对新方程进行了系统检验.结果表明新方程可利用298.15K时二元系的渗透压系数和不同温度下二元系的表面张力数据预测不同温度下高浓度的多元系的表面张力数据,且预测结果与实验数据符合得很好,并且预测结果普遍优于基于Pitzer方程的表面张力模型.

The semi-ideal solution theory has been used together with the Butler equations to establish a new predictive equation for the surface tensions of the mixed electrolyte solutions.This linear equation can yield the surface tensions of mixed solutions in terms of the properties of their binary sub-systems of equal water activity.No binary interaction parameters are involved.The predictive capability of the equation has been tested by systematic comparisons with the experimental data for 24 mixed concentrated electrolyte solutions at different temperatures and with the predictions of the literature model based on the Pitzer＇s equations.The results show that the new equation can provide accurate predictions for the mixed electrolyte solutions using only the osmotic coefficients of the binary solutions at 298.15 K and the surface tensions of the binary solutions at different temperatures.In addition,its predictions are in nice agreement with the experimental results and are generally better than the predictions of the literature model.