摘要：Interest in the development of metal removal by biosorption using microorganisms is evident in the recent literature, and the ability of microbial biomass to accumulate and remove heavy metals from water has been widely reported. We screened strains of bacteria for growth in a medium containing 10 mM of Ni( I ). The optimum growth conditions of the bacteria were as follows: growth temperature 35°C, pH 7, and ventilation of 60 ml. The bacterium can also grow in media with Zn and Cd. With increasing metal ion concentration, there was a corresponding increase in inhibition of the culture. The inhibitory cadmium ions are larger than zinc ions. The optimal conditions for nickel removal were determined as pH 8 and a temperature of 30°C; the optimal dosage of bacteria powder is 3 g/L. A bacterial strain was isolated from the wastewater of a local factory for its potential biosorption of nickel (Ni). This study validates that bacterium Ni could be used as an inexpensive and highly efficient biosorption agent for the removal of heavy metals from aqueous environment.
关键词：Bacterial bio sorbent;Adsorption efficiencies;Remove heavy metal method;Biosorption of nickel
