Biosorption of Pb(II) from synthetic wastewater onto Pseudomonas aeruginosa

Abstract

The biosorption property onto Pseudomonas aeruginosa was represented by the Langmuir isotherm, and the maximum capacity of Pb(II) was 45 mg g(-1) dry weight of bacteria at pH 5. The biosorption capacity of Pb(II) in a binary system increased with increasing Pb(II) concentration, from 0 to 50 mg l(-1) in which Cr(III) existed at a constant concentration of 50 mg l(-1). This result indicates that there was no competitive adsorption reaction for the same binding sites on the bacterial surface, because the metal properties of Pb(II) and Cr(III) ions differ.