Cr VI specific uptake by indigenous actinomycetes.

POLTI, MARTA ALEJANDRA; AMOROSO, MARÍA JULIA; ABATE; CARLOS MAURICIO

Tafí del Valle, Tucumán

Jornada; XX Jornadas de la Sociedad de Biología de Tucumán; 2003

Sociedad de Biología de Tucumán

Chromium (Cr) is distributed around the environment as CrIII. CrVI comes from industrial activities, is more toxic than CrIII and inhibit the microorganisms growth but also select Cr resistant bacteria. Its reduction has been studied for bioremediation process. ctinomycetes, have a great bioremediation potential process. The aim of this work is to study the CrVI remove capacity by actinomycetes. 10 strains were isolated from “El Cadillal”; Río Salí, a discharge channel and the sugar cane. These microorganisms were grown in MM with CrVI 50 mg l-1. The growth was determined at 72 h by dry weight and Cr concentration by a colorimetric reaction. Specific consumption was calculated (CrVimg/dry weight). CrVI 30% disappeared from the 100% strains culture medium of contaminated areas and sugar cane and less than 15% from El Cadillal strains. The specific consumption was higher than 40 for strains 75% from contaminated areas. The others presented only 15. CrVI resistance is related to the contamination and maybe sugar cane is in Cr contaminated area. These strains could be useful for CrVI bioremediation.