Geochemical modeling of cyanide in tailing dam gold processing plant |
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| Authors: | Ahmad Khodadadi M Monjezi H Mehrpouya H Dehghani |
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| Institution: | (1) Environmental Research Center, Trabiat Modares University, Tehran, Iran;(2) Mining Engineering Department, Tarbiat Modares University, Tehran, Iran;(3) Mineral Processing Department, Tarbiat Modares University, Tehran, Iran |
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| Abstract: | This research is aimed at investigating possible neutralization of cyanide in tailing dam of Muteh gold processing plant in
Isfahan, Iran at various conditions such as pH and temperature using USEPA Visual MINTEQ geochemical model simulation. The
model is based on geochemical equilibrium which uses the simultaneous solution of the non-linear mass action expressions and
linear mass balance relationships to formulate and solve the multiple-component chemical equilibrium problems. In this study
the concentration of aqueous species in tailing dam as an aqueous, solid and gaseous were used as input in the model. Temperature
and pH variation were simulated. The results of the model indicated that cyanide may be complexes in 10 < pH < 5. In other
pH values complexation is not important. The results also indicated that cyanide reduction mechanism in acidic pH and temperature
above 30°C is due to cyanide acid formation which is vaporized. |
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| Keywords: | Cyanide Complexation Geochemical model Tailing dam Gold processing |
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