Abandoned gold mines often have “tailings” (piles of waste) containing substantial amounts of cyanide (a deadly poison that is quite soluble in water). How was cyanide used to isolate gold from rock at these mines?
Abandoned gold mines often have “tailings” (piles of waste) containing
substantial amounts of cyanide (a deadly poison that is quite soluble in water). How was cyanide used to isolate gold from rock at these mines?
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