高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (5): 664.

• 论文 • 上一篇    下一篇

弱碱性阴离子交换树脂的本征解离常数

王长守, 陶祖贻   

  1. 兰州大学现代物理系, 730000
  • 收稿日期:1989-10-26 出版日期:1991-05-24 发布日期:1991-05-24
  • 通讯作者: 陶祖贻
  • 基金资助:

    国家自然科学基金

Intrinsic Dissociation Constant of Weakly Basic Anion Exchange Resin

Wang Chang-shou, Tao Zu-yi   

  1. Department of Modern Physics, Lanzhou University, Lanzhou, 730000
  • Received:1989-10-26 Online:1991-05-24 Published:1991-05-24

PDF (PC)

被引次数

5

摘要： 根据Donnan膜平衡模型及外推法提出弱碱性阴离子交换树脂本征解离常数的测定方法。并测得大孔丙烯酸系弱碱性阴离子树脂D705的本征解离常数的负对数pKbint为3.72士0.04,结果表明,Marinsky在测弱酸性阳离子树脂的pKaint时,引入交换剂相中H+及Na+的活度系数相等的假定并非必要。

关键词: 弱碱性阴离子交换树脂, 表观解离常数, 本征解离常数

Abstract: The general procedure is developed with which the intrinsic dissociation constants of weakly acidic and basic ion exchange resins can be determined without assuming the activity coefficient of M+(or X-) ion equal to that of H+(or OH-) ion in the resin phase. The procedure is based on the application of the Donnan membrane equilibrium equation and the extrapolation.In this paper, the intrinsic dissociation constant of the weakly basic anion exchange resin D705 was determined, and the water sorption, electrolyte sorption and titration curve of the resin D705 are studied in conjunction with the varying degree of neutralization.

Key words: Weakly basic anion exchange resin, Apparent dissociation constant, Intrinsic dissociation constant

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