POSSIBILITIES OF ENVIRONMENTALLY SAFE PROCESSING OF GOLD-CONTAINING ORES
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This article focuses on the selective alkaline leaching of gold-bearing tetrahedrite concentrates in a solution containing sodium sulfide and sodium hydroxide. This selective leaching process is accompanied by the transfer of heavy metals and impurities into the solution, which can affect the physical properties and quality of the leaching product, as well as lead to environmental pollution. Sodium sulfide is highly effective in acting on sulfide minerals containing tetrahedrite, while sodium hydroxide prevents sulfur hydrolysis, which would otherwise slow down the dissolution process. The leaching kinetics were studied over a five-hour period. Bulk samples were taken from three specimens at specific time intervals and analyzed using atomic absorption spectrometry to evaluate the effectiveness of selective leaching with NaOH.
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