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Destruction of cyanide in gold mill effluents: biological versus chemical treatments
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Abstract
In gold mining, cyanide has been the preferred lixiviant worldwide since 1887. Although
cyanide can be destroyed and recovered by several processes, it is still widely discussed
and examined due to its potential toxicity and environmental impact. Biological treatment
of cyanide is a well-established process and has been commercially used at gold mining
operations in North America. Biological treatment processes facilitate growth of microorganisms
that are essential for the treatment. The present review describes the advances in
the use of biological treatment for the destruction of cyanide in gold mill effluents.