Carlos  Vidal-Tovar, Carlos,  Cadavid-Osorio, Rafael  Correa-Turizo, Carlos  Severiche-Sierra, Wilman  Cabrera-Lafaurie, 
    Degradation of Cyanides in Wastewater from Gold Mining:
A Review of Literature,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 5,
    2019,
    Pages 1475-1485,
    ISSN 1816-949x,
    jeasci.2019.1475.1485,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.1475.1485)
    Abstract: Among the persistent chemical compounds in the residual discharges are the highly toxic cyanides
used in the industrial sector and in particular the mining industry for the extraction of gold, frequently appearing
in low concentrations in the water, deteriorating its quality. Being of vital importance the treatment of the
cyanide effluent, to reduce the concentration of cyanide before its final discharge, thus producing less toxic
effluents, to achieve this several studies have been carried out and developed methods for its treatment,
chemical, physical and biological An alternative to improve the quality of wastewater is the heterogeneous
photocatalysis mediated by different semiconductors such as TiO , considering this a simple technology and 2
economical in relation to bioremediation treatments, effective and innovative in our environment for aqueous
effluents.
    Keywords: Cyanized waters;environmental pollution;gold mining;liquid spills;quality;toxic effluents