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Some observations on the chemistry, toxicity and analysis of mining-related waters
The use of cyanide compounds in mining is frequently a controversial issue. Environmental groups often focus on the acutely toxic properties of many cyanide compounds to humans. The mining industry has argued that the dilute cyanide concentrations employed, the methods of use, and the rapid decomposition of these compounds make cyanide extraction a very safe alternative. Clearly the spill of almost two tons of sodium cyanide while being transported to the Kumtor mine, and the associated medical complaints and deaths have caused the public, especially in Kyrgyzstan, to reexamine these claims.
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