Pitzer模型对盐湖卤水体系Li+-K+-Mg2+-SO2-4-H2O273.15 K时溶解度的预测

Prediction of Solubilities for the Salt Lake System Li+-K+-Mg2+ -SO2-4-H2O at 273.15 K Using Pitzer Model

中文关键词:  硫酸锂  硫酸钾  硫酸镁  Pitzer模型  溶解度  预测

英文关键词:Lithium sulfate  Potassium sulfate  Magnesium sulfate  Pitzer model  Solubility  Prediction

中文摘要:

      利用文献报道的单盐溶液水的渗透系数,结合Pitzer方程,进行了Li₂SO₄-K₂SO₄-MgSO₄-H₂O体系的参数化工作,得到了273.15 K和298.15 K Li₂SO₄、K₂SO₄、MgSO₄的单盐参数以及二离子和三离子相互作用参数。利用已获得的参数对Li₂SO₄-MgSO₄-H₂O体系、Li₂SO₄-K₂SO₄-H₂O体系、K₂SO₄-MgSO₄-H₂O体系273.15 K的溶解度进行了预测,并与已有的实验数据进行了比较,获得了比较满意的结果。首次利用Pitzer模型对Li₂SO₄-K₂SO₄-MgSO₄-H₂O体系273.15 K的溶解度进行了预测,可靠的理论预测结果减少了繁重的实验测定工作。

英文摘要:

      :Pitzer model was used to simulate the properties of the system Li₂SO₄-K₂SO₄-MgSO₄-H₂O.The Pitzer binary parameters and mixture parameters for the titled system at 273.15 K and 298.15 K were obtained from the reliable experimental osmotic data and solubility data.The solubility isotherms of the titled three ternary systems were predicted by the Pitzer model and compared with the available experimental data, the agreement is generally good.The solubility isotherms for the quaternary system Li₂SO₄-K₂SO₄-MgSO₄-H₂O were predicted firstly using Pitzer model.Reliable predicted results reduce the burdensome experimental measurements.