Abstract

The comparative electrocoagulation treatments of two representative samples, a colloidal dispersion and a soluble dye, have been investigated within the same conditions in the presence of titanium and aluminum plates. The results indicate that behaviors specific to titanium electrodes contribute to reduce significantly the effectiveness of the electrocoagulation process. Contrarily to aluminum, a sufficient release of coagulants is inhibited during titanium anode dissolution due to enhanced anodization and dense, close-packed, titanium-based precipitates are formed together with stable titania nanoparticles causing a persistent turbidity in the bulk that makes separation more difficult.

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