An Approach to Estimate the Activation Energy of Cation Exchange Adsorption

文献类型： 外文期刊

第一作者： Li Yan-Ting

作者： Li Yan-Ting;Liu Xin-Min;Tian Rui;Ding Wu-Quan;Tang Ling-Ling;Zhang Jing;Li Hang;Xiu Wei-Ning

作者机构：

关键词： Specific ion effect;Ion adsorption;Charged surface;Activation energy

期刊名称：ACTA PHYSICO-CHIMICA SINICA （ 影响因子：10.8； 五年影响因子：5.5 ）

ISSN： 1000-6818

年卷期： 2017 年 33 卷 10 期

页码：

收录情况： SCI

摘要： Ion exchange adsorption is an important physicochemical process at solid/liquid interfaces. In this study, an approach was established to estimate the activation energy of cation exchange reaction on the charged surface, considering Hofmeister effects. The experimental results showed that Hofmeister effects strongly affect the ionic adsorption equilibrium on the charged particle surface. The position of the adsorbed counterion in the diffuse layer was predicted according to the established model, and the ion exchange activation energies for different bivalent cations were estimated via the cation exchange experiments. The activation energy decreases with increasing ion concentration, and the adsorption saturation of cations is a function of the activation energy at different concentrations. The established model of cation exchange adsorption in the present study has universal applicability in solid/liquid interface reactions.

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