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本文对稀溶液界面强电解质特性吸附,按热力学及双电层模型的理论处理.提出了界面过剩活度系数与吸附量间的关系式.因与Gibbs界面过剩浓度相适应,所以避免了界面层厚度问题的影响.文中论述了其非理想性主要归因于界面有序化分布时,同层同种离子间的静电推斥,从而显示用界面活度代替界面浓度的重要性.从上述关系式可导出Темкин型吸附等温线等.以液汞-KI溶液为例验证了理论结果.并论述从经验界面过剩活度系数估算一些双电层参量的可能性.
In this paper, the strong electrolyte characteristics of dilute solution interface adsorption, according to the theory of thermodynamics and electric double layer model, the relationship between the excess activity coefficient and adsorption capacity of the interface is proposed. Due to the Gibbs interface excess concentration to adapt, so avoiding the interface layer The thickness of the interface.The paper discusses the non-ideality is mainly due to the distribution of the interface orderly, the same layer ions of the same type of electrostatic repulsion, showing the interface activity instead of the importance of interfacial concentration from the above relationship The Темкин adsorption isotherm can be derived, etc. The theoretical results are validated by the mercury -KI solution, and the possibility of estimating some electric double layer parameters from the excess activity coefficient of the empirical interface is discussed.