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 Ⅴ:四元同离子体系K^+//SO_4^(2-),NO_3^-,Cl^--H_2O和Mg^(2+)//SO_4^(2-),NO_3^-,Cl^--H_2O  

Thermodynamic Model and Prediction of Solubilities in the System of Na^+,K^+,Mg^(2+)//NO_3^-,Cl^-,SO_4^(2-)-H_2O at 298.16 K Ⅴ.The Quaternary system with the common ions K^+//SO_4^(2-),NO_3^-,Cl-^-H_2O and Mg^(2+)//SO_4^(2-),NO_3^-,Cl^--H_2O

作　　者：宋彭生[1] 黄雪莉[2] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008 [2]新疆大学化学化工学院,新疆乌鲁木齐830008

出　　处：《盐湖研究》2009年第1期31-34,共4页Journal of Salt Lake Research

摘　　要：前4次文章我们获得并讨论了用于六元体系溶解度计算合理的单独电解质Pitzer参数,及四元交互体系Na+,K+//Cl-,NO3--H2O、K+,Mg2+//NO3-,SO24--H2O、K+,Mg2+//NO3-,Cl--H2O混合参数和它们的应用。此次报道在K+//Cl-,NO3-,SO24--H2O、Mg2+//Cl-,NO3-,SO24--H2O同离子四元体系溶解度预测中的应用。前一个是简单共饱型四元体系,热力学预测表明在后一体系中应有MgSO4.6H2O(Hexahydrite)存在。The authors used the obtained Pitzer parameters in previous papers to calculate solubilities in the quaternary systems with the common ions K^＋∥SO4^2-,NO3^-,Cl^--H2O and Mg^2＋∥SO4^2-,NO3^-,Cl^--H2O at 298. 15 K. A good agreement for the first system was obtained. Thermodynamics predicted the existence of hexahydrite MgSO4 ·6H2O which was absence in our measurements. But it had been reported in the early chemical literatures. It seems to be necessary to make a thorough study.

关 键 词：热力学 溶解度 PITZER参数 

分 类 号：O642[理学—物理化学]