Heavy metal biosorption by biomass of Ochrobactrum anthropi producing exopolysaccharide in activated sludge.

Guven Ozdemir, Tansel Ozturk, Nur Ceyhan, Rahim Isler, Tamer Cosar

Journal: Bioresource technology 2003;90(1):71-4

PMID: 12835060

Full Text on Elsevier Science View on PubMed

Abstract

The removal of chromium, cadmium and copper, toxic metals of high environmental priority due to their toxicity, from dilute aqueous solutions has been studied in the present work, applying a dead exopolysaccharide producing bacterium, Ochrobactrum anthropi, isolated from activated sludge. Particularly, the effect of pH, metal concentration and the effects of contact time were considered. Optimum adsorption pH values of chromium(VI), cadmium(II) and copper(II) were 2.0, 8.0 and 3.0 respectively. Experimental results also showed the influence of initial metal concentration on the metal uptake for dried biomass. Both the Freundlich and Langmuir adsorption models were suitable for describing the short-term biosorption of chromium(VI), cadmium(II) and copper(II) by O. anthropi.

Address: Department of Biology, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey. [email protected]

DOI: 10.1016/s0960-8524(03)00088-9

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MeSH Terms: Absorption, Biomass, Brucella, Cadmium, Chromium, Copper, Hydrogen-Ion Concentration, Industrial Waste, Metals, Heavy, Models, Biological, Polysaccharides, Bacterial, Sewage, Species Specificity, Water Pollutants, Chemical, Water Purification