CRCU

Chemical Research in Chinese Universities ›› 2000, Vol. 16 ›› Issue (3): 246-249.

• Articles • Previous Articles     Next Articles

A Study of Pt4+-Adsorption and Its Reduction by Bacillus Megaterium D01

LIU Yue-ying1, FU Jin-kun2, ZHOU Zhao-hui2, YU Xin-sheng2, YAO Bing-xin1   

  1. 1. Department of Biology, Xiamen 361005, P. R. China;
    2. Department of Chemistry, Xiamen University, Xiamen 361005, P. R. China
  • Received:1999-08-31 Online:2000-08-24 Published:2011-10-22
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.29743001 and No.29876026)

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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, 1g biomass/L, pH3.5 and at 30 ℃ for 24 h. Moreover, it was confirmed from anode stripping voltammetry that the strain D01 possessed a strong reducibility. The TEManalysis 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 IRspectrum implied that D01 biomass adsorption of Pt4+ may result in the complexation of the C＝O　bond to the Pt species.

Key words: Biosorption, Bioreduction, Platinum, Bacillus megaterium