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Negative Adsorption in Clay-Water Systems with Interacting Double Layers

Published online by Cambridge University Press:  01 July 2024

A. K. Helmy ,
I. M. Natale  and
M. E. Mandolesi
A. K. Helmy
Affiliation:
Universidad National del Sur, 8000 Bahía Blanca, Argentina
I. M. Natale
Affiliation:
Universidad National del Sur, 8000 Bahía Blanca, Argentina
M. E. Mandolesi
Affiliation:
Universidad National del Sur, 8000 Bahía Blanca, Argentina
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Abstract

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A relation was derived which describes negative adsorption (salt exclusion) in systems in which double layer interaction takes place but where the surface potential remains finite, such as in clay pastes and sediments. Exclusion volumes calculated for montmorillonite pastes in equilibrium with 1:1 type electrolytes were found to compare favorably with data obtained by F. A. M. de Haan in an earlier study.

Резюме

Резюме

Было выведено отношение, которое описывает отрицательную адсорбцию (удаление соли) в системах, в которых происходит взаимодецствие двойных слоев, но, где поверххностный потенциал остается ограниченным, как в глинистых пастах и отложениях. Удаленные объемы, выс-читаные для монтмориллонитовых паст, находящихся в равновесии с электролитами типа 1:1, оказались сходными с данными, полученными ранее Ф. А. М. де Хааном. [N.R.]

Resümee

Resümee

Es wurde eine Beziehung abgeleitet, die die negative Adsorption (Salzausschluß) in Systemen beschreibt, in denen Doppelschichtwechselwirkungen stattfinden, in denen aber das Oberflächenpotential begrenzt bleibt, wie z.B. in Tonpasten und Sedimenten. Die Ausschlußvolumen, die für Montmorillonitpasten im Gleichgewicht mit 1:1 Typ Elektrolyten berechnet wurden, ließen sich gut mit den Ergebnissen einer früheren Untersuchung von F. A. M. de Haan vergleichen. [U.W.]

Résumé

Résumé

On a derivé une relation qui décrit l'adsorption negative (exclusion de sel) dans des systèmes dans lesquels l'interaction à couche double se passe mais où le potentiel de surface reste fini, tel que dans des pâtes argileuses et des sediments. Des volumes d'exclusion calculés pour des pâtes de montmorillonite en équilibre avec des électrolytes du type 1:1 pouvaient être favorablement comparés aux données obtenues par F. A. M. de Haan dans une étude précedente. [D.J.]

Keywords

AdsorptionClay-water systemsDouble layerNegative adsorptionSalt exclusion
Type
Research Article
Information
Clays and Clay Minerals , Volume 28 , Issue 4 , August 1980 , pp. 262 - 266
Copyright
Copyright © Clay Minerals Society 1980

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