Resistance and biosorption mechanism of silver ions by Bacillus cereus biomass
Li Li , Qing Hu , Jinghai Zeng , Hongyan Qi , Guoqiang Zhuang
DOI:
Received January 13, 2010,Revised April 02, 2010, Accepted , Available online
Volume 23,2011,Pages 108-111
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Biosorption of silver ions onto Bacillus cereus biomass was investigated. Overall kinetic experiments were performed for the
determination of the necessary contact time for the attainment of equilibrium. It was found that the overall biosorption process was
best described by pseudo second-order kinetic model. The crystals detected by scanning electron microscope and X-ray photoelectron
spectroscopy suggested the precipitation was a possible mechanism of biosorption. The molecular genetics of silver resistance of B.
cereus biomass was also detected and illustrated by a whole cell sensor tool.
