This paper considers the feasibility of separating colloidal species according to their surface charge, by selective and reversible adsorption onto a collector surface. Selectivity is achieved through control of the electrochemical potential of the collector. The principles of controlled-collector-potential chromatographic separation (CCPCS) methods are illustrated for the separation of alumina and titania particles at a macroscopic platinum collector in aqueous electrolytes.
Jia, X., Williams, R. A., & Green, M. (1990). The feasibility of selective separation of colloidal particles at a solid-liquid interface. Chemical Engineering Communications, 91(1), 199-223. https://doi.org/10.1080/00986449008940707