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EFICACIA DEL PERMANGANATO POTÁSICO EN LA DEGRADACIÓN DE CIANURO Y TIOCIANATO EN AGUAS RESIDUALES MINERAS

Authors: Viña Mediavilla, Juan José; Fernández Pérez, Begoña; Ayala Espina, Julia; Ania, Conchi;

EFICACIA DEL PERMANGANATO POTÁSICO EN LA DEGRADACIÓN DE CIANURO Y TIOCIANATO EN AGUAS RESIDUALES MINERAS

Abstract

El objetivo de este trabajo es evaluar la viabilidad del uso de permanganato de potasio como método eficaz para la degradación de aguas residuales procedentes del sector de la minería aurífera que contienen cianuros y tiocianatos. Para ello se llevó a cabo la degradación simultánea de ambas especies cianuradas en aguas industriales. Los resultados indican que el permanganato de potasio es un agente oxidante eficaz para la eliminación de cianuro de aguas residuales de la minería aurífera. Se lograron porcentajes de eliminación de cianuro entre 95 y 100 %, en aguas con una concentración inicial de cianuros de 312 mg/L y de tiocianatos de 314 mg/L. En cambio, la eficiencia de degradación de tiocianatos es mucho menor, con porcentajes de eliminación inferiores al 50 % para altas concentraciones de oxidante. Los estudios oxidativos en aguas sintéticas mostraron que la oxidación parcial de tiocianatos da lugar a la liberación de cianuros en el agua. Por este motivo, la oxidación simultánea de cianuros y tiocianatos en las aguas residuales estudiadas no es completa, encontrándose concentraciones residuales, no despreciables, de ambas especies cianuradas, tras la reacción con el permanganato. Esto hace necesario aplicar otros métodos de oxidación para la eliminación total de las especies cianuradas.

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Spain
Keywords

[CHIM.MATE] Chemical Sciences/Material chemistry, Chemical oxidation, [CHIM.CATA] Chemical Sciences/Catalysis, [SDE.IE] Environmental Sciences/Environmental Engineering, acid mine wastewater, Cyanide species

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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