KINECTIC OF THE PROCESS OF METAL COPPER RECOVER FROM THE ELECTRIC CIRCUIT BOARD WASTE BY ELECTROLYSIS METHOD

Abstract

The electric circuit board waste has a high content of Cu (19 %), which has a very high recoverable value. Electrolysis method is preferred because of its environmental friendliness and lower cost. Therefore, the study to survey the parameters, which affects the copper recovery kinetic by leaching in acid solution and electroplate has been done. Results of analysis of copper, pH, and chloride components in waste sludge are 19.5 %, 10.1 and 20.2 %, respectively. The result of analyzing the extract solution for electroplate with the content of Cu2+ is 19.6g/L, pH = 3.0, chloride is 20.1 g/L. Experimental data on the effects of electrodes distance, stirring speed, and the current density on copper recovery kinetic by electrolysis method from waste sludge of the electric circuit board factory was presented. The study results showed that with the survey distance of 12, 25, 40 mm showed no significant effect on the first & second order reaction rate constant, specifically, k1 ranged from 0.0059 to 0.0060 minute-1, k2 was 0.0004 L/(g.minute). With the survey stirring speed of 200, 300 and 400 rpm, it shows that when the stirring speed increases, k1 decreases from 0,010 to 0,007 min-1, with k2 from 0.0010 to 0,0006 L/(g. minute). With increasing current density, the reaction rate constant k increases; with k1 increasing from 0.0038 to 0.0059 minute-1 for current density of 262, 430 A/m2, with k2 increasing from 0.0002 to 0.00067 L/(g.minute) with current density of 262, 430, 524 A/m2. The result also determines the reaction rate constant k0 to be 0.00007 L/(g.minute).