A Study of Pt4+-Adsorption and Its Reduction by Bacillus Megaterium D01 |
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Authors: | LIU Yue-ying FU Jin-kun ZHOU Zhao-hui YU Xin-sheng YAO Bing-xin |
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Institution: | 1. Department of Biology, Xiamen 361005, P. R. China;
2. Department of Chemistry, Xiamen University, Xiamen 361005, P. R. China |
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Abstract: | The properties of Pt4+-adsorption and its reduction by Bacillus megaterium D01 were studied by means of ICP,anode-stripping voltammetry,TEM,IR and XPS.The results of ICP analyses showed that the Pt4+-adsorptive efficiency of the strain D01 was as high as 94.3% under the conditions of 100 mg Pt4+/L,1 g biomass/L,pH 3.5 and at 30 ℃ for 24 h.Moreover,it was confirmed from anode stripping voltammetry that the strain D01 possessed a strong reducibility.The TEM analysis indicated that the strain D01 was able to adsorb and reduce Pt4+ to Pt0,small particles.The XPS result further supported the reduction of Pt4+ to Pt2+,followed by the further recuction to Pt0.The IR spectrum implied that D01 biomass adsorption of Pt4+ may result in the complexation of the C=O bond to the Pt species. |
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Keywords: | Platinum Bacillus megaterium |
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