In gold mining industries, electrolytes used for gold electrolysis often contain ammonium sulfate ((NH4)2SO4) or ammonium chloride (NH4Cl), sodium chloride (NaCl) and potassium nitrate (KNO3) [30] . To evaluate the impact of a certain ions on the cyanide removal, the concentration of sulfate, chloride and nitrate ions in the synthetic cyanide solution was varied by introducing different masses of K2SO4, NH4Cl and NaNO3 in order to evaluate their impacts on the capacity and the cyanide abatement rate.