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International Journal of Scientific and Engineering Research
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ISSN Print: 2229-5518 7    
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scirp IJSER >> Volume 3,Issue 7,July 2012
Studies on Biological Removal of Plumb (Pb) by Bacillus subtilis
Full Text(PDF, )  PP.336-339  
Harikrishna Yadav. Nanganuru, Satish. Mutyala, Bhanu Prakash. Maradala
Bacillus subtilis, Biomass, Bioremediation, Biosorption, Plumb.
Waste from industries is a serious and growing problem in most developing countries. Some heavy metals are known to cause damage to living organisms including human beings. Their detoxification efficiency indicates good potential for application in bioremediation of toxic heavy metals. In those heavy metals, Plumb in soil is influenced to a great extent by microbial activity. Microorganisms have ability to absorb Pb from a medium. The biological removal of Pb ions from aqueous solutions by using the bacterial culture was investigated. The growth of the Bacillus subtilis culture was noticed by Pb concentration in growth medium, thus about 20% of the bacteria can grow up to 50 mg Pb/L medium. The results revealed that the living biomass of the cultures were more efficient to absorb Pb. The formulation of yeast, peptone medium fortified the cultures by ingredients favoured the best growth yields that have the highest Pb absorption. The absorption of Pb by Bacillus subtilis was considerably influenced by the pH value of the absorption medium, contact time, biomass levels and Pb concentration. Thus, 91% of Cd was absorbed in medium containing I0 mg Cd.
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