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The Interaction of Kaolinite with Polyphosphate and Polyacrylate in Aqueous Solutions—Some Preliminary Results

Published online by Cambridge University Press:  09 July 2018

J. I. Bidwell ,
W. B. Jepson  and
G. L. Toms
J. I. Bidwell
Affiliation:
Central Laboratories, English Clays Lovering Pochin & Co. Ltd., St Austell, Cornwall
W. B. Jepson
Affiliation:
Central Laboratories, English Clays Lovering Pochin & Co. Ltd., St Austell, Cornwall
G. L. Toms
Affiliation:
Central Laboratories, English Clays Lovering Pochin & Co. Ltd., St Austell, Cornwall
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Abstract

The choice of kaolinite sample for surface chemical studies is examined. An adsorption apparatus, particularly suited for those studies where the adsorbate acts as a deflocculant, is described. Some preliminary results are given for the adsorption of total phosphate from tetrasodium pyrophosphate solutions and of polyacrylate from sodium polyacrylate solutions. The release of aluminium and silicon from the kaolinite was measured; with tetrasodium pyrophosphate, aluminium-phosphate complexes are formed.

Competitive adsorption measurements suggest that the polyacrylate is adsorbed on the positively charged edges of the kaolinite.

Type
Research Article
Information
Clay Minerals , Volume 8 , Issue 4 , December 1970 , pp. 445 - 459
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1970

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