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The electrically induced adsorption of carboxylated colloidal particles from aqueous suspension on a carbon electrode was studied. Due to high colloid to electrode charge density ratio, adsorption is effected only to a small extent when the electrode potential is varied within the double layer potential range. At extreme potentials where water is involved in Faradaic reactions, colloid adsorption occurs due to pH variations. The process may be attractive for purification of suspensions from fine particles since no chemicals have to be added in order to induce adsorption or desorption of the colloid.
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Hall et al. (1987) studied this question.
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