SORPTION EXTRACTION OF COPPER BY IONITE LEWATIT MONOPLUS TP-220 FROM NITRIC ACID SOLUTIONS OF COPPER CONCENTRATE LEACHING
The PURPOSE of the paper is to study the equilibrium in the system ion-exchanger TP-220 - copper-containing solution and kinetic characteristics of Lewatit TP-220 ion-exchanger as applied to the solution after the nitric acid leaching of the copper concentrate of the unpayable ore of the Zhezkazgan deposit. METHODS. Static experiments were carried out to determine sorption equilibrium. Static sorption was conducted in glass jars where the phases were mixed by mechanical agitators. The sample of the sorbent was treated for a certain time by the initial solution at the temperature of 75°C. At the end of the process the phases were separated. The solutions were sampled to analyze the content of copper and other cations. The saturated sorbent was washed with water and analyzed for the content of main components. RESULTS AND THEIR DISCUSSION. It has been determined that the isotherm of copper sorption by ion-exchanger TP-220 confirms high sorption capacity even at extremely low concentrations of copper in the initial solution. The temperature factor in the range from 20 to 500С at a contact time of phases more than 60 minutes does not have any noticeable effect on the ion exchange parameters of the sorbent. CONCLUSIONS. The sorption of copper on the sorbent under investigation features high rate that ensures its maximum capacity even after 60 minute contact at room temperature, i.е. sorbent has good kinetic properties of copper sorption.