PEF对KCl溶液活度系数的影响

EFFECT OF PEF ON ACTIVITY COEFFICIENT OF KCI SOLUTION

将脉冲电场(PEF)与电解质溶液活度联系在一起,对溶液热力学理论的研究有着突出性的重要意义。通过对不同浓度的KCl溶液施加PEF,观测其对溶液电导率的影响,并应用电导率法计算溶液的活度系数。在Onsager电导方程和Guggenheim经典热力学理论的基础上,提出了计算溶液活度系数的新模型,可将电导率法的应用范围提高到1 mol/L浓度以内。通过计算发现,在施加PEF后,可在一定程度上提高KCl溶液的活度系数。并且从溶液微观结构上对KCl溶液活度系数的改变作了深入阐述。

A novel method is applied by contacting pulsed electric field( PEF) with electrolyte solution activity,which is important to the research of solution thermodynamics theory. PEF is added into KCl solution with different concentration to observe the change of solution conductivity,and the activity efficient can be calculated with conductivity method. A novel calculating solution activity coefficient model is set up,on the base of Onsager conductive equation and Guggenheim classical thermodynamic theory,which enlarge the range of conductivity method to 1 mol / L. It is found that activity coefficient of KCl solution can be increased in some degree after adding PEF. Besides,the change of KCl solution activity coefficient is explained from solution microstructure in this article.