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Extracellular Polysaccharides (EPS) from both prokaryotes and eukaryotes have a great deal of research interest as they protect the producer from different stresses including antibiotics, ionic stress, desiccation and assist in bio-film formation, pathogenesis, adhesion, etc. In this study haloalkaliphilic  Bacillus  sp., known to cope with osmophilic stress, was selected and screened for EPS production. The EPS were isolated, partially purified and chemical characteristics were documented using liquid FT-IR followed by assessment of heavy metal biosorption (lead, copper and cadmium) using Atomic Absorption Spectroscopy (AAS). The EPS extracted from three isolates  B. licheniformis NSPA5 ,  B. cereus NSPA8  and  B. subtilis NSPA13  showed maximum biosorption of Lead followed by Copper and Cadmium. Of the tested isolates, the EPS from isolate  B. cereus NSPA8  showed maximum (90 %) biosorption of the lead.

Biosorption of lead, copper and cadmium using the extracellular polysaccharides (EPS) of Bacillus sp., from solar salterns