Resistance and biosorption mechanism of silver ions by Bacillus cereus biomass |
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Authors: | Li Li Qing Hu Jinghai Zeng Hongyan Qi and Guoqiang Zhuang |
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Institution: | Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China |
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Abstract: | 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. |
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Keywords: | Bacillus cereus biosensor biosorption crystal isotherms kinetics silver |
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