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通过引入表达离子缔合或离子间的短程静电作用项,提高了局部组成模型关联单一电解质水溶液体系热力学性质的精度,并通过建立新的计算多元混合体系作用参数的方法,将其推广应用到多离子电解质溶液体系。在此基础上,预测了Na+//Cl-,SO2-3,H2O、K+//Cl-,SO2-4,NO-4,NO-3,H2O、K+,Na+//Cl-,SO2-4,H2O、K+,Na+//Cl-,NO-3,H2O3,H2O、K+,Na+//SO2-4,NO-3,H2O5个四元体系及K+,Na+//Cl-,SO2-4,NO-五元体系的溶解度,模型参数均通过上述体系所包含的二元、三元体系的溶解度数据获得,计算结果满意。
The accuracy of the thermodynamic properties of the single electrolyte aqueous solution system with local compositional model was improved by introducing the short-range electrostatic interaction term that expressed the ionic association or the inter-ion interaction. The new method to calculate the interaction parameters of the multi-component mixing system was extended to more Ionic electrolyte solution system. On the basis of this, we predict that Na + // Cl-, SO2-3, H2O, K + // Cl-, SO2-4, NO-4, NO3, H2O, K +, Na + // Cl-, SO2-4 Five quaternary systems of H2O, K +, Na + // Cl-, NO-3, H 2 O 3, H 2 O, K +, Na + / SO 2 -4, NO 3, The solubility and model parameters of NO-quaternary system are obtained through the solubility data of binary and ternary systems contained in the above system, and the results are satisfactory.