用于Am(III) 吸收的含有aza-crown的二甲醇胺的两种提取色谱树脂的辐射稳定性
Piyali Banerjee1, Rajesh B Gujar2, Seraj A Ansari2
1Nuclear Recycles Board, INRPO, BARC, Tarapur, Maharashtra 401 502, India.
Journal of chromatography. A
|March 8, 2025
概括
两种新的提取色谱树脂,TAM-3-DGA和TAM-4-DGA,表现出极好的放射性稳定性和可回收性,用于从放射性废物溶液中分离Am(III).
科学领域:
- 放射化学 放射化学是指辐射化学.
- 核化学 核化学 核化学
- 分离科学 分离科学
背景情况:
- 从放射性废物中有效地分离Am(III) 对核废物管理至关重要.
- 提取色谱树脂与二甲基胺 (DGA) 连接体显示选择性金属离子复合的希望.
- 研究这些树脂的放射性稳定性对于它们在高辐射环境中的实际应用至关重要.
研究的目的:
- 评估两种基于阿扎冠的DGA树脂TAM-3-DGA和TAM-4-DGA的放射性稳定性和性能,用于Am(III) 分离.
- 评估玛辐射对树脂物理化学性质和Am(III) 吸收能力的影响.
- 确定这些树脂的可回收性和适用于放射性废物处理中的工业应用的适用性.
主要方法:
- 将TAM-3-DGA和TAM-4-DGA树脂暴露在高达1000kGy的马辐射中.
- 从酸性酸溶液 (0.5 M - 6 M HNO3) 中进行Am(III) 吸收研究.
- 评估辐射和原始树脂的物理化学特性.
- 使用Am(III) 标记物和Eu载体进行柱体研究.
- 在5个连续的吸-脱周期中评估树脂性能.
主要成果:
- 两种TAM-3-DGA和TAM-4-DGA树脂在分离Am(III) 从放射性料溶液中表现出色.
- 这些树脂表现出了显著的抗辐射性,在辐射后保持Am(III) 吸收的高分布系数.
- 辐射后,物理化学性质基本保持稳定,这表明结构完整性强.
- 在多个循环中成功回收证实了树脂的耐用性和经济可行性.
结论:
- 研究的TAM-n-DGA (n=3,4) 树脂具有高度的放射性稳定性,适合从酸性放射性废物中分离Am(III).
- 这些树脂为核废物处理提供了可靠和可回收的解决方案,性能没有显著下降.
- 这些发现支持这些先进树脂在工业规模的核废物管理中的潜在应用.
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