物理化学学报 >> 1991, Vol. 7 >> Issue (04): 430-435.doi: 10.3866/PKU.WHXB19910411

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弱碱性和强碱性阴离子交换树脂的离子交换平衡的比较SO2-4-Cl--NO-3体系

陶祖贻; 王刚; 于长英   

  1. 兰州大学现代物理系，兰州 730000
  • 收稿日期:1990-03-09 修回日期:1990-10-30 发布日期:1991-08-15
  • 通讯作者:

Comparsion Between the Ion Exchange Equilibria of Strong and Weak Base Anion Exchange Resins SO2-4-Cl--NO-3 System

Tao Zu-Yi; Wang Gang; Yu Chang-Ying   

  1. Department of Modern Physics, Lanzhou University, Lanzhou 730000
  • Received:1990-03-09 Revised:1990-10-30 Published:1991-08-15
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摘要： 本文详细地比较了在弱碱性和强碱性阴离子交换树脂上, SO_4~(2-)-Cl~-、NO_3~--Cl~-及NO_3~--SO_4~(2-)二元交换的等温线和修正选择系数。实验测定及理论计算了上述三种二元交换反应的标准自由能的改变量。测得了在弱碱性树脂上的SO_4~(2-)-Cl~--NO_3~-三元交换的等温线。适用于强酸性和强碱性树脂的从二元交换平衡数据推算三元交换平衡数据的方法推广应用于弱碱性树脂。

关键词: 二元离子交换平衡, 三元离子交换平衡, 强碱性阴离子树脂, 弱碱性阴离子树脂

Abstract: The ion exchange isotherms, the corrected selectivity coefficients and the rational thermodynamic equilibrium constants of the weak base anion resin 710A have been determined for the SO_4~(2-)-Cl~-, NO_3~--Cl~- and NO_3~--SO_4~(2-) systems at 25 ℃. The comparsion of the ion exchange equilibria between the weak and the strong base anion resins were reported. The affinity sequence of the strong and the weak base anion resins for the sulphate, nitrate and chloride are in agreement with the theoretical predictions. The SO_4~(2-)-Cl~--NO_3~- system ternary isotherm was also determined on the weak base anion resin 710A at 25 ℃. The predictions of the ternary system based solely on the binary data are consistent with the experimental data found for this system as did for the SO_4~(2-)-Cl~--NO_3~- -strong base anion resin system.

Key words: Binary ion-exchange equilibrium, Ternary ion-exchange equilibrium, Strong base anion resin, Weak base anion resin