摘要
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。
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.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1990年第2期67-69,共3页
Atomic Energy Science and Technology
关键词
铀
裂变产物
阴离子
交换树脂
分配
Distribution factor
Static equilibrium
Uranium
Fission product
Anion exchanger
