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Concentration-Dependent Adsorption of CsI at the Muscovite-Electrolyte Interface.

ABSTRACT: The interfacial structure of muscovite in contact with aqueous CsI solutions was measured using surface X-ray diffraction for several CsI concentrations (2-1000 mM). At CsI concentrations up to 200 mM, Cs⁺ adsorption is likely hindered by H₃O⁺, as both cations compete for the adsorption site above the muscovite hexagonal cavity. Above this concentration, more Cs⁺ adsorbs than is required to compensate the negatively charged muscovite surface, which means that coadsorption of an anion takes place. The I^- anion does not coadsorb in an ordered manner. Moreover, the hydration ring and water layers do not change significantly as a function of the CsI concentration.

SUBMITTER: Brugman SJT

PROVIDER: S-EPMC5942870 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Concentration-Dependent Adsorption of CsI at the Muscovite-Electrolyte Interface.

Brugman Sander J T SJT Townsend Eleanor R ER Smets Mireille M H MMH Accordini Paolo P Vlieg Elias E

Langmuir : the ACS journal of surfaces and colloids 20180320 13

The interfacial structure of muscovite in contact with aqueous CsI solutions was measured using surface X-ray diffraction for several CsI concentrations (2-1000 mM). At CsI concentrations up to 200 mM, Cs+ adsorption is likely hindered by H3O+, as both cations compete for the adsorption site above the muscovite hexagonal cavity. Above this concentration, more Cs+ adsorbs than is required to compensate the negatively charged muscovite surface, which mea ...[more]

PMID: 29521510

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