ABILITY OF Phanerochaete chrysosporium AND Trametes versicolor TO REMOVE Zn 2+ , Cr 3+ , Pb 2+ METAL IONS Habilidad de Phanerochaete chrysosporium y Trametes versicolor para Remover Iones Metálicos

SUMMARY The use of fungal biomass as an alternative for removing heavy metals has become increasingly important in recent years, replacing conventional methods based on chemical physical processes. In this study, we evaluated the biosorption of Zn 2+ , Cr 3+ and Pb 2+ , which were analyzed to determine their ef fect on growth kinetic parameters of Phanerochaete chrysosporium strain ATCC 32629 and Trametes versicolor ATCC 1267. Growth kinetics were performed in four liquid culture media: 1) Yeast Nitrogen Base (YNB) used as control, 2) YNB medium plus Pb 2+ (0.25, 1 and 2 mg L -1 ), 3) YNB medium plus Zn 2+ (5, 10 and 20 mg L -1 ) and 4) YNB medium plus Cr 3+ (0.5, 1 and 2 mg L -1 ). The f lasks were incubated at 25 °C with shaking at 150 rpm. Metal concentrations were determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES) with prior acid digestion of the sample. The results demonstrated that Phanerochaete chrysosporium ATCC 32629 and Trametes versicolor ATCC 12679 are able to grow in the culture medium with Pb