Journal of Pure and Applied MicrobiologyVol. 2 No. 2

Role of Bacteria in Bioremediation of Heavy Metals

T. Eswar Ganesh Babu and S.A. Mastan*

Post-Graduate Department of Biotechnology DNR College. P.G Courses and Research Centre. Bhimavaram - 534 202, India.

Received on 11 August 2008 and accepted on 15 September 2008



A total of nineteen metal-resistant and non-resistant bacteria from activated sludge treating both metal-contaminated industrial effluents and municipal wastewater were isolated and identified. Among these isolates, Pseudomonas pseudoalcaligenes and Micrococcus luteus were selected for further investigations due to their high copper and lead biosorption capacities. Cells of M. luteus could be used for at least five alternate biosorption and desorption cycles without loss of copper removal capacity. Immobilization of M. luteus in 2% calcium alginate and 10% potyacry lamide gel bead increased copper uptake by 61 %. M. luteus and P. pseudoalcaligenes may have potential applications in removing and recovering copper and lead respectively from industrial effluents. In this paper we review the role of bacteria in Bioremediation of Heavy metals.

Keywords : Bacteria, Bioremediation, heavy metals.