INFLUENCE OF ALUMIN IUM COAGULANTS COMPOSITION ON COLOIDAL CHARACTERISTICS OF KAOLIN DISPERSIONS
Abstract
The effect of aluminium coagulants’ composition on colloidal characteristics of kaolin dispersions (diameter, particle size distribution, density and sedimentation rate of aggregates) has been investigated by the laser diffraction method. Shape and structure of aggregates have been characterized by comparing the experimentally determined fractal dimension values and computer simulation data. When aluminium sulphate was used as a coagulant, the size of aggregates has been found to increase, while their density decreased, for dispersions of mixed aluminium hydroxide aggregates with kaolin, as compared to pure aluminum hydroxide dispersions. In the case of pentahydroxydialuminium chloride, the reverse relationships have been observed.
About the Authors
A. V. Zyhmant
Research Institute for Physical Chemical Problems of the Belarusian State University
Russian Federation
Research Assistant.
Russian Federation
Research Assistant.
T. A. Savitskaya
Research Institute for Physical Chemical Problems of the Belarusian State University
Russian Federation
Ph. D. (Chemistry), Professor
Russian Federation
Ph. D. (Chemistry), Professor
N. G. Tsygankova
Research Institute for Physical Chemical Problems of the Belarusian State University
Russian Federation
Ph. D. (Chemistry), Leading Researcher
Russian Federation
Ph. D. (Chemistry), Leading Researcher
D. D. Hrynshpan
Research Institute for Physical Chemical Problems of the Belarusian State University
Russian Federation
D. Sc. (Chemistry), Professor
Russian Federation
D. Sc. (Chemistry), Professor
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