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K⁺, Na⁺//Cl^-,SO₄^2-,NO₃^--H₂O体系热力学研究

Thermodynamic model of the system K⁺, Na⁺//Cl^-,SO₄^2-,NO₃^--H₂O

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【作者】黄雪莉；

【Author】 HUANG Xueli1,2(1.School of Chemical Engineering, Dalian University of Technology, Dalian 116012; Liaoning Province, China; 2. College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China)

【机构】大连理工大学化工学院辽宁大连　116012新疆大学化学化工学院；新疆乌鲁木齐　830008；

【摘要】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。更多还原

【Abstract】 With introducing a term to present ion association and developing a new method to calculate the energy parameters of multicomponent electrolyte solution, the electrolyte nonrandom twoliquid model proposed by Chen C. C. was improved, and could be used for mixtures containing an indefinite number of ions of arbitrary charge. As a result, the solubilities were predicted for the system Na+//Cl-,SO2-4,NO-3,H2O?K+//Cl-,SO2-4,NO-3,H2O?K+,Na+//Cl-,SO2-4,H2O?K+,Na+//Cl-,NO-3,H2O?K+,Na+//SO2-4,NO-3,H2O?K+,Na+//Cl-,SO2-4,NO-3,H2O, all parameters were determined only from the liquidsolid equilibrium data of the binary and ternary systems. The solubilities predicted agree with the data in literature very well.更多还原