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Consejo Nacional de Ciencia y Tecnología, CONACYT: 213624, 48436-Y, 92506
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funding vehicle for: Stability of kaolinite dispersions in the presence of sodium and aluminum ions

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Stability of kaolinite dispersions in the presence of sodium and aluminum ions
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e iscopus: 2-s2.0-78650742574
date time value: article date 2887
has publication venue: Applied Clay Science
issue: 1-2
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estado: published
type: Article
most specific type: Article
has funding vehicle: Consejo Nacional de Ciencia y Tecnología, CONACYT: 213624, 48436-Y, 92506
doi: 10.1016/j.clay.2010.10.023
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crisid: 2887
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most specific type: Document
volume: 51
type: Continuant
origen: scopus
freetext keyword: Aluminum chloride; Colloidal dispersions; Kaolinite; Salt coagulation; Sodium chloride Aluminum chlorides; Aluminum ions; Aluminum salts; Aqueous solutions; Colloidal dispersion; Colloidal particle; DLVO theory; Electrical double layers; High salt concentration; Hydroxyl groups; Kaolinite dispersions; Oxygen atom; Stable dispersions; Adsorption; Aluminum; Coagulation; Dispersions; Electric properties; Electrophoretic mobility; Hydrogen bonds; Kaolinite; Oxygen; Sodium chloride; Turbidity; Zeta potential; Kaolin; adsorption; aluminum; aluminum compound; coagulation; colloid; concentration (composition); electrokinesis; ionic composition; kaolinite; particle size; sodium; sodium chloride
page end: 42
abstract: The stability of colloidal kaolinite dispersions in the presence of NaCl and AlCl3 was studied by measuring turbidity, electrophoretic mobility and adsorption. The kaolinite particles coagulated at pH 2.5-3.5 and were dispersed at pH >4.5. These results well obeyed the classic DLVO theory if the mean zeta potential of the kaolinite particles in aqueous solutions was taken into account in the computation of potential energy of electrical double layer repulsion, which suggests that the kaolinite particles might coagulate in the same way as normal colloidal particles. The kaolinite particles in aqueous aluminum salt solution only coagulated at a medium AlCl3 concentration, and formed a stable dispersion at a high salt concentration. This is caused by Stern-layer adsorption of hydrolyzed aluminum species, probably adsorbed on the kaolinite surfaces through hydrogen bonds between the hydroxyl groups of the aluminum species and the oxygen atoms on the kaolinite surfaces. © 2010 Elsevier B.V.
page start: 38

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Applied Clay Science
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publication venue for: Stability of kaolinite dispersions in the presence of sodium and aluminum ions
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RDF description of Stability of kaolinite dispersions in the presence of sodium and aluminum ions - http://orbis.uaslp.mx/vivo/individual/scopus2886
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