Ion Adsorption at Clay-Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals

Underwood, Thomas; Erastova, Valentina; Greenwell, H. Christopher

doi:10.1346/ccmn.2016.0640310

Cited by 55 publications

(64 citation statements)

References 52 publications

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“…Na + is a strongly hydrated ion which has been observed to bind as an outer sphere complex on mica (Lee et al, 2012) compared to inner sphere adsorption of the native K + . It is not expected to bind as strongly to mica, or other clay minerals, as the native K + (Underwood et al, 2016) or the quaternary ammonium ions which formed the bilayer.…”

Section: Discussionmentioning

confidence: 99%

Anionic surfactant induced desorption of a cationic surfactant from mica

Allen

Truscott

Welbourn

et al. 2018

Applied Clay Science

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The adsorption and desorption of a cationic surfactant, didodecyldimethylammonium bromide, from water onto a mica surface has been investigated using neutron reflectivity. The surfactant was observed to adsorb strongly as a bilayer that was tenacious to a sustained water wash, but on the addition of an anionic surfactant, sodium dodecyl sulfate, at its critical micelle concentration complete desorption was observed.

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Section: Discussionmentioning

confidence: 99%

Anionic surfactant induced desorption of a cationic surfactant from mica

Allen

Truscott

Welbourn

et al. 2018

Applied Clay Science

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“…44 The result is surprising however, not only are sodium ions able to adsorb to the electronegative siloxane surface, but also the electropositive hydroxyl surface. The sodium adsorption to the hydroxyl surface may be ascribed to ionic interactions between cations and atoms further within the clay mineral, for example the gibbsite oxygens or aluminums, whilst the phenomenon may also be described by the presence of the negatively charged organic matter.…”

Section: Interactions Of Decanoate Anions With Kaolinitementioning

confidence: 99%

Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces

2016

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. (2016) 'Wetting e ects and molecular adsorption at hydrated kaolinite clay mineral surfaces.', Journal of physical chemistry C., 120 (21). pp. 11433-11449. Further information on publisher's website:https://doi.org/10.1021/acs.jpcc.6b00187 Publisher's copyright statement: This document is the Accepted Manuscript version of a Published Work that appeared in nal form in The Journal of Physical Chemistry C, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see https://doi.org/10.1021/acs.jpcc.6b00187. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. do not adsorb to the silicate surface, yet adsorb to the hydroxyl surface through an anion exchange mechanism. Decanamine readily adsorbs to both silicate and hydroxyl surfaces, though the hydroxyl-amine interactions are mediated through water bridges.Once charged, the decanamine remains adsorbed to both surfaces, however, both interactions are ionically mediated, rather than through van der Waals and hydrogen bonds.Furthermore, protonated decanamine is observed to adsorb to the hydroxyl surface via anion bridges, a phenomenon that is typically associated with positively charged layered double hydroxides rather than negatively charged clay minerals.2

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“…In this part, the other parameters were the same as the last step, but total simulation time was 600 ps, it was run to ensure that the system has reached equilibrium, and the final models were used for analysis [26,40]. During the simulation, the simple point charge (SPC) model was used to represent the interaction of H 2 O [41,42], in which the geometrical structure of these molecules is rigid, the bond length is 1.0 Å and bond angle is 109.5 • [43]. The CLAYFF force field which has been proved to work very well in previous simulation studies about MT was employed to describe the interatomic potential for Na-MT-water systems [44][45][46][47].…”

Section: Simulation Parametersmentioning

confidence: 99%

Effect of Crystal Chemistry Properties on the Distribution Characteristics of H2O and Na+ in Na-Montmorillonite Interlayer Space: Molecular Dynamics Simulation Study

et al. 2020

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At monolayer hydration state, the spatial distribution of H2O and Na+ in the interlayer of Na-montmorillonite (Na-MT) with different crystal chemistry properties was investigated by the molecular dynamics simulation method. The simulation results show that when layer charge density increases, H2O will move and form hydrogen bonds with O in tetrahedral surfaces (Ot) at a distance of 1.676 ± 0.043 Å. The impact of isomorphic substitution on the relative concentration of H2O depends largely on the layer charge density of Na-MT, when layer charge density is high, H2O move obviously to both sides of Na-MT sheets with the increase of octahedral substitution ratio. Nevertheless, Na+ coordinate with Ot at a distance of 2.38 Å, and the effect of isomorphic substitution ratio on the diffusion of Na+ is opposite to that of H2O. The mobility of both H2O and Na+ decreases with the increase of layer charge density or tetrahedral substitution ratio. The radial distribution function of Na-Ow (O in H2O) shows that the coordination strength between Na+ and Ow decreases with the increase of layer charge density or tetrahedral substitution ratio, and Na+ are hydrated by four H2O at a Van der Waals radius of 2.386 ± 0.004 Å. The research results can provide a theoretical basis for the efficient application of Na-MT at the molecular and atomic levels.

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Ion Adsorption at Clay-Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals

Cited by 55 publications

References 52 publications

Anionic surfactant induced desorption of a cationic surfactant from mica

Anionic surfactant induced desorption of a cationic surfactant from mica

Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces

Effect of Crystal Chemistry Properties on the Distribution Characteristics of H2O and Na+ in Na-Montmorillonite Interlayer Space: Molecular Dynamics Simulation Study

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