物理化学学报 >> 1996, Vol. 12 >> Issue (04): 320-324.doi: 10.3866/PKU.WHXB19960407

研究论文 上一篇    下一篇

用超网链(HNC)近似研究唐南平衡

徐桦,陈念贻   

  1. 常熟高等专科学校化学系，江苏常熟 215500|中国科学院上海冶金研究所，上海 200050
  • 收稿日期:1995-07-28 修回日期:1995-10-11 发布日期:1996-04-15
  • 通讯作者: 陈念贻

The Research of Donnan Equilibrium with Hypeinetted-chain(HNC) Approximation Method

Xu Hua,Chen Nian-Yi   

  1. Changshu College,Changshu,Jiangsu 215500|Shanghai Institute of Metallurgy,Academia Sinica,Shanghai 200050
  • Received:1995-07-28 Revised:1995-10-11 Published:1996-04-15
  • Contact: Chen Nian-Yi

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摘要：

用超网链（HNC）近似法研究了离子间势能对唐南平衡的影响，并计算了唐南平衡中的平衡密度、渗透压和唐南电位．计算表明，唐南电位比渗透压对离子间势能更灵敏．使用平均离子活度系数，所得唐南电位很接近于以前的研究；使用更正确的单离子活度系数，所得唐南电位更接近实验值．

关键词: 超网键近似, 唐南平衡, 唐南电位, 离子间势能, 离子活度系数

Abstract:

The effect of interionic potential to Dennan equilibrium has been investigated with HNC method. Also, the equilibrium density, the osmotic pressure and the Donnan potential of Donnan equllibrium have been calculated. It was found in our calculations that the Donnan potential is a more sensitive quantity to interionic potential than the osmotic pressure, which was thought to be particularly sensitive to interionic potential in the previous Donnan equllibrium investigations. If single ion activity coefficients are used, values of the Donnan potential would be much more different from the values which were obtained before, but it is more reasonable and more comparable with the experimental values.

Key words: Hypernetted-chain approximation, Donnan equilibrium, Donnan potential, Interionic potential, Ion activity coefficient