Oxidación fotocatalítica para la remoción del ión cianuro en aguas residuales minero-metalúrgicas

Abstract

In the last decade contamination in Ecuador has increased due to the large number of reagents used in mining industries, one of the compounds most used in metallurgical processes is cyanide, to mitigate desecration one of the advanced oxidation technologies such as photocatalysis was studied. In recent years photoanalysis has been efficient through the use of catalysts that are not toxic or environmentally harmful. The behaviour of the cyanide concentration present in a residual mineral-metalurgical current of the recirculation area (lexiviation and flotation) was studied at an initial concentration of 300ppm, the sample is subjected to an ultraviolet light (UV) photooxidation process, the catalyst used was titanium dioxide taking a weight of 0.5 g/L And as an oxidising agent hydrogen peroxide was used by taking 111μl, A pH of 11 was maintained so as not to cause compounds more toxic than cyanide. To perform the respective cynaide quiantification analusis, it took 10 mL of the reactor every 15 minutes.