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我们简化了混合电解质溶液过量吉布斯自由能的Pitzer公式。用此简化公式并结合我们以往的工作计算了Nd(NO_3)_3-HNO_3-H_2O体系的过量吉布斯自由能和Nd(NO_3)_3-HNO_3-H_2O-HDEHP-AMSCO体系水相中各组分的活度系数,计算值与实验值均很接近。此工作为镧系金属萃取分离进行热力学分析提供了方便。
We have simplified the Pitzer formula for excess Gibbs free energy for mixed electrolyte solutions. Using this simplified formula and combining with our previous work, the Gibbs free energies of Nd (NO 3) 3 HNO 3 -H 2 O system and the components of Nd (NO 3) 3 HNO 3 -H 2 O-HDEHP-AMSCO The activity coefficient, the calculated value and the experimental value are very close. This work provides a convenient method for the thermodynamic analysis of lanthanide metal extraction and separation.