There is a growing problem around mining contamination by tailings in the Peruvian territory, cyanide is used in mining and represents a poison for human life and the environment; In this sense, the present investigation contributes in the search for strategies that allow the decontamination of cyanide. The objective of the study is to evaluate the efficacy and the correlation of the pH of the culture medium with the concentration of Sodium Cyanide in the degradation by Pseudomonas sp. In the methodology, a bubble column bioreactor was used where pH values of 8, 9 and 10 were handled with cyanide concentrations of 250ppm, 500ppm and 750ppm, the calculation of free cyanide was determined volumetrically with AgNO3 and KI, the study variables were analyzed using the non-parametric Spearman's Rho test. The results showed that the higher efficiency of cyanide (CN) degradation by Pseudomonas sp. was 92.50% and this occurs at a pH of 8 and a concentration of 500 ppm of CN in the medium, also observing a high strength of inverse correlation between the two variables of -0.949 through the coefficient of Spearman's rho.

Biodegradation; Cyanide; Pseudomonas; pH; concentration