USING THE FENTON PROCESS TO DISSOLVE BRASS DUST: A KINETIC STUDY OF COPPER DISSOLUTION

Abstract

Waste dust from brass polishing facilities, which has a high copper content, has economic value that needs to be recovered. Dissolution for copper from brass waste dust based on the Fenton process is one of the hydrometallurgical solutions of great interest because it has economic and environmental benefits. Experimental design method was used to determine suitable parameters including pH, Fe²⁺ content, stirring speed and H₂O₂ content for copper dissolution from brass dust was carried out. Kinetic models and kinetic parameters have also been determined. The results showed that the copper dissolving efficiency reached 97%, along with the largest dissolution rate constants during the reaction at pH 1, 0.1M [Fe²⁺], stirring speed 60 rpm, H₂O₂ content 1.8% with flow rate of 1 mL/min, in 2 hours survey. Kinetic data have shown that a first-order kinetic model can be used to explain the kinetics of copper dissolution from brass dust and that the mechanism of this process is controlled by the above surface chemical reaction. Research results have shown that the Fenton process can be used to dissolve copper from brass dust as a basis for further research such as electrolysis to recover metallic copper or chemical production.