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Correlation between surface charge and hydration on mineral surfaces in aqueous solutions: A critical review
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-07-13 , DOI: 10.1007/s12613-020-2078-0
Hong-liang Li , Wen-nan Xu , Fei-fei Jia , Jian-bo Li , Shao-xian Song , Yuri Nahmad

Surface charges and hydration are predominant properties of colloidal particles that govern colloidal stability in aqueous suspensions. These properties usually coexist and interact with each other. The correlation between the surface charge and hydration of minerals is summarized on the basis of innovative experimental, theoretical, and molecular dynamics simulation studies. The factors affecting the adsorption behavior of ions and water molecules, such as ion concentration, ion hydration radius and valence, and surface properties, are discussed. For example, the hydration and adsorption states completely differ between monovalent and divalent ions. For ions of the same valence, the effect of surface charge on the hydration force follows the Hofmeister adsorption series. Electrolyte concentration exerts a significant effect on the hydration force at high ion concentrations. Meanwhile, the ion correlations in high-concentration electrolyte systems become long range. The interfacial water structure largely depends on surface chemistry. The hydration layer between different surfaces shows large qualitative differences.



中文翻译:

水溶液中矿物质表面的表面电荷与水合作用的相关性:一项重要综述

表面电荷和水合是控制水性悬浮液中胶体稳定性的胶体颗粒的主要特性。这些属性通常共存并相互影响。在创新的实验,理论和分子动力学模拟研究的基础上,总结了矿物的表面电荷与水化之间的关系。讨论了影响离子和水分子吸附行为的因素,例如离子浓度,离子水合半径和化合价以及表面性质。例如,一价和二价离子之间的水合和吸附状态完全不同。对于相同价态的离子,表面电荷对水合力的影响遵循Hofmeister吸附系列。在高离子浓度下,电解质浓度对水合力有重要影响。同时,高浓度电解质体系中的离子相关性变大。界面水结构主要取决于表面化学性质。不同表面之间的水合层在质量上存在很大差异。

更新日期:2020-07-13
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