Adsorption of fatty acids on fine mineral particles as a purification method of industrial wastewaters

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Abstract
The problem of fines disposal and utilization that has to be faced from most of the mineral processing plants, in relation with the removal of fatty acids (reagents that constitute usual anionic collectors and could be possibly found in flotation plant waters) led to the study of the adsorption of later on fine particles, being in this case magnesite and dolomite. Another main application of this work is in the separation of fines (at sub‐sieve size range) by flotation. Sodium oleate and a commercial tall oil fatty acid were selected in the present. Common parameters and their effect on adsorption were carefully looked at, including the pH of solution and concentration. The presence of modifying reagents (as sodium hexametaphosphate, pyrophosphate and carboxymethyl cellulose) was also examined.

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