Aislamiento de consorcio de microorganismos degradadores de cianuro
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Fecha
2006
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Corporación Universitaria Lasallista
Resumen
Introduction. Cyanide is used in the mining industry
to recover gold, in the shape of a solution, from
mother material. This compound is highly toxic
and generates great environmental problems,
therefore several physical and chemical technologies
have been developed to solve them.
Materials and methods. Three microogranisms´
consortiums were isolated from soils coming from
gold mines in the municiple of Amalfi, Antioquia,
where the gold extraction is made with mercuriy. o
select the most efficient microorganisms the
consortiums were cultivated in nutritive broth,
increasing the potasium cyanide concentration from
2x10-4 ppm to 2000 ppm. All the process was made
under aerobic and anaerobic conditions. Later, the
nutritive broth was replaced, step by step, with
minimum mineral medium, with 2000 ppm of
potasium cyanide as a source of carbon and
nitrogen. All the cultivation mediums were prepared
at a pH value of 7. During this last stage, the consumed
cyanide was quantified with a cyanide selective
ion electrode. Results. During the development of
this work consortiums of microorganisms were
isolated from soils coming from mining zones, and
their efficiency for the degradation of potasium
cyanide was determined. Conclusion: The biological
degradation can be a better alternative to eliminate
this contaminant.
Descripción
Palabras clave
Biodegradación, Corporación Universitaria Lasallista, Minería, Oro - Producción, Contaminación, Contaminación del suelo, Cianuro, Microorganismos degradadores de cianuro, Contaminación por cianuro