The Removal of Mixtures of Metals by an Adsorbing Colloid Foam Flotation Pilot Plant

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Abstract
An adsorbing colloid foam flotation pilot plant was used to remove Cu(II), Zn(II), and Cr (III) from aqueous mixtures of these ions. The simulated wastewater contained 20 mg/L of each of these ions; residual concentrated ions were less than 0.1 mg/L (Cu), 0.5 mg/L (Zn), and 0.2 mg/L (Cr) under optimal conditions. Sodium dodecyl sulfate was used as the collector; and Fe(OH)3, Al(OH)3, and mixtures of the two were used as the carrier floc.

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