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Biosorption of lead and uranium by Streptomyces sp.


Both Pb(II) and UO2 2+ were abstracted from aqueous solution by both living and dead biomasses of Streptomyces sp. The organisms were particularly effective in taking up UO2 2+ ions. Optimum pH for both metals was pH 5 to 6. For a UO2 2+ concentrations of 1 mmol L−1 and a dead biomass concentration of 1 g L−1, 60% of the UO2 2+ was removed from solution. If cell wall material of the organism was prepared from a killed biomass an equal weight of the material removed 90% of the UO2 2+ from solution. in this case accumulated U in the biomass was 0.9 mmol g−1 of dry biomass. Electron micrographs showed clearly that the Pb abstracted was only in the microorganisms cell surface, but UO2 2+ uptake was also intracellular.

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Golab, Z., Orlowska, B. & Smith, R.W. Biosorption of lead and uranium by Streptomyces sp. . Water Air Soil Pollut 60, 99–106 (1991).

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  • Biomass
  • Aqueous Solution
  • Cell Wall
  • Cell Surface
  • Uranium