بررسي كاربرد زئوليت براي حذف سيانور از آب سد باطله كارخانه فرآوري طلا

Investigation of Cyanide Removal from Tailing Dam Water Using Zeolite

The basic purpose of this research was to study cyanide adsorption on zeolite surface from tailing dam water in Aghdareh Takab gold processing plant. Results indicated that the solution pH, adsorption time, temperature and the amount and size of zeolites particles were the most important parameters in the adsorption mechanism. Zeolite was used in two fraction sizes; 100-300 and 300- 1000 microns in tests in two type natural and impregnated conditions. The optimum amounts of zeolite in solution for natural and impregnated were determined 30 and 24 gr/1 for the small and large fraction sizes, respectively. The maximum percent of cyanide adsorbed on (100-300)* particles sizes 50.2% and 86.1 % on (300-1000)* particle sizes. In any fractions optimum values of pH were 10.5 and 10 for natural and impregnated types, respectively. Contact time in equilibrium conditions for each types of (100-300)* and (300-1000)* sizes were 40 and 50 min respectively. In (100-300)* particle size adsorption isotherm follow natural type from. The amount of cyanide adsorption one impregnated zeolite was more than natural type.