Biosorption of Cr3+ from aqueous solution by a NaOH-treated bacterial dead Streptomyces rimosus biomass

A. Selatnia*, M.Z. Bakhti

Ecole Nationale Polytechnique d'Alger, Département de Génie Chimique, 10, avenue Pasteur, Belfort, B.P 182, EL-Harrach, Alger, Algérie

Accepted 15 January 2005


The chromium biosorption capacity of a Streptomyces rimosus biomass treated with NaOH (0.1M) was studied in the batch mode. After pre-treatment of biomass at the ambient temperature, optimum conditions of biosorption were found to be: a biomass particle size between 50 and 112µm, an average saturation contact time of 1h, a biomass concentration of 3g/l and a stirring speed of 250rpm .The equilibrium data could be fitted by Freundlich isotherm equation. Under these optimal conditions, 110mg Cr3+/g biomass were fixed.

Keywords: Biosorption, Chromium, Streptomyces rimosus, Waste-water treatment

* Corresponding author
   E-mail : ammar_selatnia@yahoo.fr