Specific ion effects of incomplete ion-exchange by electric field-induced ion polarization
| Autor: | Xinmin Liu, Hang Li, Rui Tian, Wei Du, Rui Li, Wuquan Ding |
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| Rok vydání: | 2020 |
| Předmět: |
Imagination
Materials science Chemical substance Ion exchange General Chemical Engineering media_common.quotation_subject Cationic polymerization 04 agricultural and veterinary sciences 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Ion Adsorption Physics::Plasma Physics Chemical physics Electric field 040103 agronomy & agriculture 0401 agriculture forestry and fisheries 0210 nano-technology Polarization (electrochemistry) media_common |
| Zdroj: | RSC advances. 10(26) |
| ISSN: | 2046-2069 |
| Popis: | Incomplete ion-exchange results from ion interfacial reactions portray a particular scenario of interactions between ions and charged surfaces. In this study, the constant flow method was adopted to study the incomplete ion-exchange state of mono-valent cation adsorption of X+ (X+ = Cs+, Na+ and Li+) in X+/K+ exchange at the montmorillonite particle surface. The pronounced incomplete ion-exchange state and strong specific ion effects were experimentally observed. Further research found that the disparity in the activation energies for different ion exchange systems caused by electric field-induced ion polarization was responsible for the observations. Thus, a theoretical description of the incomplete ion-exchange state by taking the ion polarization into account was established and verified. Applicable new approaches to measuring the cationic diffusion coefficient in heterogeneously charged systems and the cationic actual diffuse depth in the electric double layer were also derived from the theory. |
| Databáze: | OpenAIRE |
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