使用X射线吸收细结构光谱技术二甲基酸盐物种的结构研究
Jonathan George1, Ramsey Salcedo2,3,4, Rachel Greenberg2,3,4
1Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 S.Maryland Parkway, Las Vegas, Nevada 89154, United States.
这项研究使用X射线吸收细结构 (XAFS) 光谱学来研究提取过程中的技术 (Tc) 变异. dodecane 中的二甲基酸 (HDBP) 形成二度 Tc 物种,影响核燃料再加工中的分离化学.
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
- 材料科学 材料科学 材料科学
背景情况:
- 了解技术 (Tc) 变异对于核燃料再加工至关重要.
- 双酸 (HDBP) 是核废物处理中常见的提取剂.
- 在酸性溶液中的Tc(IV) 行为会影响分离效率.
研究的目的:
- 为了阐明由HDBP从水溶液中的多德干中提取的Tc(IV) 的物种化.
- 使用XAFS.确定提取的Tc物种的结构特征.
- 了解水相组合在提取过程中对Tc物种化的影响.
主要方法:
- 采用X射线吸收细结构 (XAFS) 谱法来分析Tc的特异化.
- 从H2O和1M HNO3中提取Tc(IV) 通过在多德中使用HDBP.
- 将XAFS数据与已知的Tc双核物种和单核酸盐物种进行比较.
主要成果:
- 观察到二度Tc物种与Tc2O2和Tc2O单位的形成.
- 提取物种的拟议配方:[Tc2O2(DBP·HDBP) ]从H2O中提取,以及[Tc2O ((NO3) 2 ((DBP) 2 ((DBP·HDBP) ]从1M HNO3.3中提取.
- 对于二维单位,确定了2.55(3) Å和3.57(4) Å的Tc-Tc距离.
结论:
- 在多德干中Tc(IV) 变种受到提取机制 (固体再溶解或直接提取) 的影响.
- 水溶液的制备对有机阶段的最终Tc分化有很大的影响.
- 这些发现凸显了TC分离化学的复杂性及其与核燃料再加工的相关性.
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