Samar Kumar Pal, Syam Sundar Konar, Abhishek Mukherjee and Tapan Kumar Das
Keywords: Cadmium resistant mutant, Aspergillus sp, mycelial biosorption & adsorption, reduced glutathione.
Abstract: N-methyl N’-nitro N-nitroso guanidine induced cadmium resistant mutant (Cd2) of Aspergillus niger was selected for the study of removal of cadmium ions from cadmium contaminated aqueous systems like sewage, river and pond water. Growth studies of the Cd2 mutant in plane and glucose supplemented sewage, river and pond water indicated that Cd2 mutant could grow well both in plane and glucose supplemented river and sewage water but not as growth in glucose supplemented aqueous systems. The intracellular as well as extracellular Cd+2 concentration of the mutant grown in cadmium contaminated river water reflected the capability of the mutant for removal of cadmium ions both by the mycelial absorption and adsorption methods from an aqueous system. The enhancement of the mutant strengthened the support for high tolerance of the mutant to cadmium ions which favors the removal of cadmium ions.
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