铀及某些裂变产物元素在HCl-阴离子交换树脂体系中的分配系数测定

DETERMINATION OF DISTRIBUTION FACTORS OF URANIUM AND FISSION PRODUCT ELEMENTS IN HCl-ANION EXCHANGER SYSTEM

摘要: <正> 一、引言元素在离子交换树脂上的吸附性能,通常以元素在该体系中的分配系数K_d(每g干树脂上吸附元素的量和与其平衡的1 ml溶液中该元素的量的比值)表示,而K_d=iE/ρ[i为树脂层的空隙率(0.38),ρ为湿树脂的密度(～0.45g干树脂/ml),E是淋洗常数,即淋洗平衡时,溶质在每块理论塔板上固液相之间的分配系数]与E直接有关。因此K_d是预期元素柱行为的一个重要参数。文献中有关阴离子交换的报道很少。Kraus给出了若干元素
- 分配系数 ,
- 静态平衡 ,
- 铀 ,
- 裂变产物 ,
- 阴离子交换树脂
Abstract: In this work the distribution factors K_d s of uranium and fission product ele-ments (Zr, Nb, Mo, Pd, Ag, Cd, Sb, Te, U etc.) in 0-12 mol/1 HCl or HCl plusa little HNO_3-Anion exchanger (20×7) system are determined by a static equili-brium method. The K_ds of Zr, Nb and Sb (V) increase with decreasing acidity. When theacidity of the medium is near neutral, there is a minimum K_d of Mo at 0.5--1mol/1. In addition, the existence of a little HNO_3 (0.3--0.5 mol/1) does not effectthe K_d s very much, except that the K_d of Pd (Ⅱ) increases by about one order of magnitude.
- Distribution factor ,
- ,
- Static equilibrium ,
- ,
- Uranium

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