A large number of metallurgical-mining operations involve the use of water as part of their processes, and as a consequence, the generation of effluents containing metal ions, which, being present in concentrations of parts per million represent a certain difficulty for the treatment and the recovery of the metallic species. In the present work the treatment of a synthetic solution of 100 ppm Cr(III) is approached by means of a laboratory scale cell using activated carbon electrodes supported in graphite to effect a separation by electro-sorption. Adsorption tests of activated carbon were performed, finding a low capacity to adsorb Cr(III); these results were contrasted against the electro-sorption process, in which an obvious advantage was compared with respect to traditional adsorption, by increasing the removal beyond double with respect to adsorption results.
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