Isolation of Cadmium- Resistant Fungi and their Cadmium Removal Behavior

In this study, one strain of fungi identified as Phoma sp. F2 with high ability of cadmium resistance and accumulating the heavy metal was screened from a mineral blende, then removal and adsorptive behavior for cadmium by F2 were studied. We discovered that F2 survived as high concentration as at 2 000 mg· L- 1 of cadmium. When cultured in liquid, cadmium in medium was removed effectively, especially, with highly initial concentration of cadmium, and cadmium content of dried biomass reached 28% . Adsorption of cadmium by dried biomass of F2 was in accordance with stair adsorption kinetics, and kinetic parameters were calculated in the present study. We also found that the adsorption ability of lyophilized biomass was much higher than oven dried biomass. It was suggested that the fungi remove effectively cadmium at wide ranges of pH and cadmium concentrations.