CJCU

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (5): 639.

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Studies on Ion Exchange and Adsorption of Au(Ⅰ), Ag(Ⅰ) and Other Metal Cyanide Anions by BPR Resin (Ⅱ) ——Determination of Intraparticle Diffusion Coefficient and Study on the Mass Transfer Process

GAN Wei-tang, LIU Yan-ming, ZHANG Yu-fan   

  1. Department of Chemistry, Nankai University, Tianjin, 300071
  • Received:1991-04-01 Online:1992-05-24 Published:1992-05-24

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Abstract: The intraparticle diffusion coefficient and activation energy of Au (Ⅰ), Ag (Ⅰ), Ni (Ⅰ), Fe(Ⅱ) cyanide anions were determined in Cl, NO3, OH-type BPRresin at different temperatures.It is found from the experimental results that the mechanism for extracting Au (Ⅰ), Ag(Ⅰ) and other metal cyanide anions by BPRresin belongs to ion exchange process.The difference of activation entropy of some metal cyanide anions (△S-△S) was evaluated.

Key words: Shallow bed technique, BPR resin, Aurocyanide anion, Intraparticle diffusion coef-ficient

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