Optimization of the Copper Recovery from Waste Water Using Electroflotation Process by Means of pH-Control

摘要

Effect of pH on the efficiency of the recovery of sparingly soluble copper compounds from aqueous solutions was studied. Results related to the pH effect on the solubility particles size and charge and the solutions conductivity are given. Minimum solubility is observed over the range 9 to 11. For example at pH=10 99,7% of copper is in the dispersed state (Fig.l), and this facilitates maximum recovery of copper. At the same time it was found that in a model solution, containing no supporting electrolyte the dependance of the electrokinetic potential on the pH cross the absence of pB~8,7 (Curve 1 in Fig.2).