用于贫化锌分离的冠醚树脂合成及其特性研究

摘要/Abstract

摘要： 采用缩聚法自行合成了基于聚苯乙烯和二苯并-18-冠醚-6的PS@DB18C6冠醚树脂,并对其稳定性及吸附、解吸机理及特性进行了探究,而后进行了柱色谱法锌同位素分离实验。结果表明PS@DB18C6冠醚树脂在pH=7的丙酮溶液中具有较大的吸附容量,对锌离子的吸附模型为准一级动力学方程,在pH=3的α-羟基异丁酸(AHIB)溶液中的解吸满足一级动力学方程,且在吸附、解吸过程中能保持较好的结构稳定性;利用PS@DB18C6冠醚树脂通过柱色谱法能够有效实现锌同位素的分离,经过5 m色谱柱淋洗操作后,对⁶⁶Zn和⁶⁸Zn的最大前端富集值(β)分别为1.019 6和1.020 8。

关键词: 二苯并-18-冠醚-6, 柱色谱法, 贫化锌, 同位素分离, 最大富集值

Abstract: PS@DB18C6 crown ether resin based on polystyrene and dibenzo-18-crown ether-6 was synthesized by poly-condensation method, and its stability, adsorption and desorption mechanism and characteristics were explored. Then Zinc isotopes separation experiment by column chromatography was carried out. The results showed that PS@DB18C6 crown ether resin has large adsorption capacity in acetone solution at pH=7. The adsorption model of Zinc ion is a quasi-first-order kinetic equation, and the desorption of α-hydroxyisobutyric acid (AHIB) solution at pH=3 satisfies the first-order kinetic equation. PS@DB18C6 crown ether resin can maintain good structural stability during adsorption and desorption. Zinc isotopes can be effectively separated by column chromatography with PS@DB18C6 crown ether resin. After the leaching operation of 5 m chromatographic column, the maximum front-end enrichment values (β) of ⁶⁶Zn and ⁶⁸Zn are 1.019 6 and 1.020 8 respectively.

Key words: Dibenzo-18-crown ether-6, Column chromatography, Depleted Zinc, Isotopes separation, Maximum enrichment value

中图分类号:

TL75

李程鑫, 苏兴东, 詹杰, 何烨, 李雪菲, 李家文, 刘峰, 薛怡, 俎建华. 用于贫化锌分离的冠醚树脂合成及其特性研究[J]. 辐射防护通讯, 2023, 43(3-4): 67-74.

Li Chengxin, Su Xingdong, Zhan Jie, He Ye, Li Xuefei, Li Jiawen, Liu Feng, Xue Yi, Zu Jianhua. Synthesis and Characteristics of Crown Ether Resin for Depleted Zinc Separation[J]. RADIATION PROTECTION BULLETIN, 2023, 43(3-4): 67-74.

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