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Electrochemical charge of silica surfaces at high ionic strength in narrow channels

Abstract : We present a theoretical framework to calculate the electrochemical charge on silica surfaces in contact with high-ionic-strength solutions in narrow channels. Analytical results indicate that the contribution of the adsorbed metal cations to the total surface charge is not negligible when the salinity is larger than 1 mM. The electrical triple-layer model is proved much better than other models for high ionic strength. The charge regulation caused by the double-layer overlap in narrow channels will reduce the surface charge density but increase the zeta potential on silica surfaces.
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https://hal-insu.archives-ouvertes.fr/insu-00565378
Contributor : Pascale Talour <>
Submitted on : Saturday, February 12, 2011 - 12:38:06 AM
Last modification on : Friday, September 25, 2020 - 3:13:45 AM

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Moran Wang, André Revil. Electrochemical charge of silica surfaces at high ionic strength in narrow channels. Journal of Colloid and Interface Science, Elsevier, 2010, 343, pp.381-386. ⟨10.1016/j.jcis.2009.11.039⟩. ⟨insu-00565378⟩

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