Investigation of Cyanide Removal from Tailing Dam Water in Aghdareh-Takab Gold Processing Plant by Talc

The basic purpose of this research was the investigation of cyanide adsorption on talc mineral surface from tailing dam water in Aghdareh-Takab gold processing plant. Then in this work, talc was used for adsorbing the cyanide from the tailing dam water. Solution pH, adsorption time, amount and size of talc and temperature are some important parameters in the adsorption mechanism. talc was used in two fraction (100-300) and (300-1000) microns in tests in two type (natural and impregnated) conditions. Optimum amounts talc for natural and impregnated types and maximum percent of cyanide adsorbed in (100-300)m are about 30 and 24(g/L) and 50.2% and 86.1 % (300-1000)m are about 36 and 24(g/L) and 50.2% and 86.1 % respectively. In any fractions optimum values of pH are 10.5 and 10 for natural and impregnated types respectively. Contact time in equilibrium conditions for each types of (100-300)m and (300-1000)m is 40 and 50 min respectively. In (100-300)m adsorption isotherm follow natural type from Frondlich and impregnated type of Longmuir models amount of cyanide adsorption on impregnated talc more than natural type.