Biosorption of Lead by Bacillus cereus Isolated from Industrial Effluents.
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Date
2012-04
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Abstract
Aims: To study the biosorption of lead ions from solution using Bacillus cereus isolated
from industrial effluents collected from Peenya industrial area, Bangalore, India and to
determine the optimum conditions for biosorption.
Study design: Experimental study.
Place and Duration of Study: Department of Microbiology and Biotechnology, Bangalore
University, Bangalore, Karnataka, India, between October 2008 and December 2009.
Methodology: Sixty bacterial strains were isolated from industrial effluents collected from
Peenya industrial area. Among the sixty isolates only six were selected for further
investigation due to their high minimum inhibition concentration for lead. Lead biosorption
studies were carried out for all the six isolates using atomic absorption spectrometry. The
optimum conditions (temperature, pH and culture age) for biosorption were determined for
the isolate showing highest lead biosorption.
Results: The lead biosorption capability of all six isolates was studied at different
concentrations of lead (100, 200, 300, 400 and 500 mg/l). The isolate 6 showed highest
lead biosorption capability and was identified as Bacillus cereus. Studies on the control of
environmental factors revealed that an optimum temperature of 30°C and pH 5, facilitates
maximum biosorption of lead by 24hrs old culture of Bacillus cereus.
Conclusion: Biosorption is an alternative to traditional physicochemical methods for
removing toxic metals from wastewaters. The results of this study are discussed in the
light of the biosorption capacity of Bacillus cereus that could be exploited in the
bioremediation of lead.
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Keywords
Bacillus cereus, lead, biosorption, bioremediation, industrial effluent
Citation
Murthy Shruti, Bali Geetha, Sarangi S K. Biosorption of Lead by Bacillus cereus Isolated from Industrial Effluents. British Biotechnology Journal. 2012 Apr; 2(2): 73-84.