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Abstract
Bacterial exopolymers are known to be efficient in banding metals and could influence the adsorption of copper by activated carbon. A gram positive bacterium Bacillus megaterium is found to be responsible for removing a high quantity of Cu from aqueous solutions. Resting bacterial cells of B. megaterium can remove up to 39.1 mg of Cu per g of cell dry weight. Almost total removal of Cu was achieved with the bacteria in combination with activated carbon up to a Cu concentration of 100 m.g/l. Growing bacterial cells are found to have a synergistic effect on the adsorption of cu by activated carbon.
Notes
Author for all correspondence
Present address: Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi‐110 012, India