Summary
Mycelial biomass of wild type and a Co2+-resistant N.crassa (cor) was used to remove Co2+ from aqueous media. Mycelia obtained from growth in nitrate N-medium (NaNO3) was more effective than ammonium N-medium (NH4NO3), in removing Co2+. Co2+-resistant N.crassa cor was more efficient than wild type in removing Co2+ from medium containing higher concentrations (500 mg/L). Metal removal was linear up to 12 h at which 35–60% Co2+ is depleted from medium, reaching near saturation by 24 h (90% removal). Co2+ removal was as efficient even from pure solutions and sodium azide inhibited the process up to 60%. Cell walls prepared from nitrate N-medium grown mycelia bound 3–5 fold more Co2+ when compared to ammonium N-medium. The importance of bioaccumulation and biosorption in bioremediating toxic metal ions from effluents is discussed.
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References
Akthar, N.Md. and Mohan, P.M. (1995). Curr.Sci. 69,1028–1030.
Akthar, N.Md., Sastry,K.S. and Mohan, P.M. (1995). Biotechnol.Lett. 17, 551–556.
Akthar, N.Md., Sastry, K.S. and Mohan, P.M. (1996). BioMetals 9, 21–28.
Brierley, C.L., Brierley, J.A. and Davidson, M.S. (1989). Metal ions and Bacteria. T.J. Beveridge & R.J. Doyle., eds, John Wiley & Sons, New York.
Gadd, G.M. (1993). New Phytol. 124, 25–60.
Garnham, G.W., Codd, G.A. and Gadd, G.M. (1993). Microb.Ecol. 25, 71–82.
Kumar, C.S., Sastry, K.S. and Mohan, P.M. (1992). Biotechnol.Lett. 14, 1099–1102.
Kuyucak, N. and Volesky, B. (1989). Biotechnol. & Bioengg. 33, 809–814.
Schmit, J.C., Edson, C.M. and Brody, S. (1975). J. Bacteriol. 122, 1062–70.
Subramanian, K.N. and Sarma, P. S. (1968). Biochem. Biophys. Acta. 156, 199–202.
Subramanyam, C. and Venkateswerlu, G. and Rao, S.L.N. (1983). App. Environ. Microbiol. 46, 585–590.
Venkateswerlu, G. and Sastry, K.S. (1970). Biochem. J. 118, 497- 503.
Venkateswerlu, G. and Sastry, K.S. (1973). Biochem. J. 132, 673–680.
Venkateswerlu, G. and Sastry, K.S. (1979) Ind. J. Biochem. Biophys. 16, 84–87.
Venkateswerlu, G. and Stotzky, G. (1986). Can J. Microbiol. 32, 654–658.
Volesky, B. (1994). FEMS Microbiol. Rev. 14, 291–302.