Evaluación de la capacidad de remoción de cadmio mediante levaduras (Rhodotorula mucilaginosa y Cryptococcus gastricus), aisladas del volcán Tungurahua.

Abstract

The removal capacity of cadmium by Rhodotorula mucilaginosa, Cryptococcus gastricus and Saccharomyces cerevisiae was determined by the colorimetric dithizone method. Cadmium removal by the yeasts was studied a pH of 6 and in an incubator orbital at a temperature of 27 ° C, and at concentrations of 34240 mg/l of cadmium, the removal rates were higher than 95 %, showing a high death rate of the yeasts in the removal process. In addition, the process of removing cadmium was tested at concentrations of 2140 mg/l, maintaining the conditions described above. In this case Rhodotorula mucilaginous showed a removal capacity of 100 % of heavy metal while C. gastricus and S. cerevisiae had a maximum capacity of 98,5 % and 99,5 % respectively.