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Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (2): 287.

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Studies on the Adsorption and Reduction of Au3+ Ion with Chelating Fiber Containing Amidoxime Group (Ⅱ)——Preliminary Studies on the Oxidation-Reduction Process

LIN Wei-Ping, FU Ruo-Wen, TANG Li-Yuan, LU Yun, ZENG Han-Min   

  1. Materials Science Institute, Zhongshan University, Guangzhou, 510275
  • Received:1992-04-07 Revised:1992-10-31 Online:1993-02-24 Published:1993-02-24

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Abstract: The relationship between chelating and reduction in the adsorption process of Au3+ ion onto chelating fiber containing amidoxime group was discussed.It is shown that, during the adsorption process for Au3+, the chelating fiber chelates with Au3+ ion at first, then partially reduces the adsorbed Au3+ ion into gold; the amidoxime group is gradually oxidized into amide group and carboxyl group.After the fiber with adsorbed Au3+ ion is burnt out at high temperature, spongy metallic gold is obtained.

Key words: Amidoxime group, Au3+ ion, Chelation, Oxidation-reduction, Spongy gold

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