Biosorption of copper(II) by Pseudomonas aeruginosa
by L. Philip, L. lyengar, C. Venkobachar
International Journal of Environment and Pollution (IJEP), Vol. 5, No. 1, 1995

Abstract: The mechanism of accumulation of copper(II) by Pseudomonas aeruginosa was investigated. Uptake consisted of a rapid process (likely to be extracellular binding) followed by a slow phase (possibly cellular uptake). The sorption capacity of the microbe was found to be 50 mg/g, and sorption followed the Langmuir isotherm. The presence of mild mineral acids (0.1 N HCl) led to destructive desorption of 95% of sorbed metal, whereas citrate buffer (pH 4) desorbed 80% of the accumulated metal ions non-destructively. Spectroscopic and microscopic studies indicated the accumulation of metal inside the cell, though the maximum uptake was by the cell wall.

Online publication date: Thu, 17-Sep-2009

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