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Electrochemical Coagulation of Clay Suspensions

Published online by Cambridge University Press:  28 February 2024

J. Szynkarczuk ,
J. Kan ,
T. A. T. Hassan  and
J. C. Donini
J. Szynkarczuk
Affiliation:
CANMET, Western Research Centre, 1 Oil Patch Drive, Devon Alberta TOC 1E0, Canada
J. Kan
Affiliation:
CANMET, Western Research Centre, 1 Oil Patch Drive, Devon Alberta TOC 1E0, Canada
T. A. T. Hassan*
Affiliation:
CANMET, Western Research Centre, 1 Oil Patch Drive, Devon Alberta TOC 1E0, Canada
J. C. Donini
Affiliation:
CANMET, Western Research Centre, 1 Oil Patch Drive, Devon Alberta TOC 1E0, Canada
*
1Present address: Department of Mining and Petroleum Engineering, Al Azhar University, Cairo, Egypt.
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Abstract

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In the electrocoagulation process a suspension of kaolinite and bentonite is coagulated by electrochemical treatment where aluminum anodes are dissolved and aluminum ions react with clay particles, forming flocs which precipitate. Several factors affecting the efficiency of electrocoagulation are investigated. They include NaCl concentration, voltage, and flow conditions within the cell. Increased NaCl concentration led to lower electric resistance and cleaner running electrodes. Enhanced shear associated with recirculation resulted in clear supernatant and more compact floes. While increasing the feed rate, which was equivalent to decreasing aluminum concentration through the system, reduced cake height but increased turbidity.

Keywords

BentoniteCoagulationElectrochemical treatmentKaolinite
Type
Research Article
Information
Clays and Clay Minerals , Volume 42 , Issue 6 , December 1994 , pp. 667 - 673
Copyright
Copyright © 1994, Clay Minerals Society

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