This work aims to determine the optimum condition to recovery gold from waste of gold refinery by electrochemical method. Parameter effects for leaching process were solvents type (H2SO4, HNO3, Thiourea and Aqua regia), solvent concentrations (0.5 - 4 M) and percentage of solid per solvent (0.25-3.0 %wt./vol). The effects of current density (31.85 A/m2 - 318.47 A/m2) and electrodes type (Carbon, Stainless steel and Copper) were also investigated in gold recovery by electrochemical method. The results showed that aqua regia and 4 M of H2SO4 could leach gold up to 41% wt. and 30% wt., respectively. At optimum condition, 0.25 %wt./vol could leach all of gold in waste. The solution was used to study in electrochemical part. The current density had an effect on gold recovery. In 4 M of H2SO4 electrolyte, the percentages of gold recovery was 89.87 ± 10.63 by carbon electrode while the used of aqua regia as an electrolyte, the percentages of gold recovery was 36.65 ± 5.08 at the current density of 31.85 and 63.70 A/m2 respectively. Moreover, carbon electrode showed higher efficiency than stainless steel electrode and copper electrode for gold recovery in this study.
