||Sorption of Heavy Metals by the Soil Fungi 'Aspergillus niger' and Mucor rouxii.
Mullen, M. D.;
Wolf, D. C.;
Beveridge, T. J.;
Bailey., G. W.;
||Environmental Research Lab., Athens, GA. ;Tennessee Univ. at Martin. ;Arkansas Univ., Fayetteville. Dept. of Agronomy. ;Guelph Univ. (Ontario). Dept. of Microbiology.
X ray analysis;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Sorption of the nitrate salts of cadmium(II), copper(II), lanthanum(III) and silver(I) by two fungi, Aspergillus niger and Mucor rouxii, was evaluated using Freundlich adsorption isotherms and energy dispersive X-ray electron microscopy. The linearized Freundlich isotherm described the metal sorption data well for metal concentrations of 5 microM-1 mM metal. Differences in metal binding were observed among metals, as well as between fungal species. Calculated Freundlich K values indicated that metal binding decreased in the order La(3+) > or = Ag(+) > Cu(2+) > Cd(2+). However, sorption of Ag(+) was greater than that of La(3+) from solutions of 0.1 and 1 mM metal and likely due to precipitation at the cell wall surface. At the 1 mM initial concentration, there were no significant differences between the two fungi in metal sorption, except for Ag(+) binding. At the 5 microM concentration, there was no difference between the fungi in their sorption capacities for the four metals. Electron microscopy-energy dispersive X-ray analysis indicated that silver precipitated onto cells as colloidal silver. The results indicate that Freundlich isotherms may be useful for describing short-term metal sorption by fungal biomass and for comparison with other soil constituents in standardized systems. (Copyright (c) 1992 Pergamon Press plc.)
||Pub. in Soil Biology and Biochemistry, v24 n2 p129-135 Feb 92. Prepared in cooperation with Tennessee Univ. at Martin, Arkansas Univ., Fayetteville. Dept. of Agronomy, and Guelph Univ. (Ontario). Dept. of Microbiology.
|NTIS Title Notes
||Reprint: Sorption of Heavy Metals by the Soil Fungi 'Aspergillus niger' and Mucor rouxii.
||68; 57K; 57B; 99F
||PC A02/MF A01