摘要
本文尝试将溶剂萃取动力学研究中的单液滴法,应用于非均相同位素交换动力学研究。以氯化铀酰盐酸水溶液为连续水相,用下落液滴法测定了有机相中冠醚-铀(Ⅵ)萃合物与水相铀酰离子之间的铀(Ⅵ)的同位素交换速度,其结果符合一级反应觇律,在液滴半径为0.156cm时,同位素半交换期t_(1/2)为9.3s.
This paper describes the kinetics of the U(Ⅵ)-U(Ⅵ) heterogenuous isotope exchange reaction between the extracted complex of the macrocyclic polyether-U(Ⅵ)in dichloroethane continuous phase and uranyl ion in aqueous phase by a falling single drop technique which is often used to study the kinetics of liquid-liquid extraction. The results of the study show that the rate law is consistent with first-order reaction. The time for 50% exchange is about 9.3 seconds when the radii of the liquid drops are about 0.156cm.
出处
《同位素》
CAS
北大核心
1990年第2期98-101,97,共5页
Journal of Isotopes
关键词
同位素
变换
速度
单液滴法
铀(VI)
single drop method, crown ether, uranium(Ⅵ), rate of isotope exchange
