通过含有Aza-crown的基于离子液的提取色谱树脂进行高效的动因酸结合,以Aza-crown为基础的功能化滴糖胺.
Piyali Banerjee1, Seraj A Ansari2, Thichur P Valsala3
1Nuclear Recycles Board, INRPO, BARC, Tarapur, Maharashtra 401 502, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India.
Journal of chromatography. A
|February 22, 2024
概括
使用二甲基胺 (DGA) 连接体的新提取色谱树脂 (ECR) 显示出高分离Am3+和Pu4+的能力. 这些树脂通过离子液体增强,为潜在的核废物管理应用提供高效的金属离子吸附和脱离.
科学领域:
- 放射化学 放射化学是指辐射化学.
- 分离科学 分离科学
- 材料化学 材料化学
背景情况:
- 开发用于核废物再处理的先进材料至关重要.
- 迪格利胺 (DGA) 连接体在选择性金属离子提取方面显示出前景.
- 离子液体可以提高提取色谱树脂 (ECR) 的性能.
研究的目的:
- 在aza-crown以太支架上合成和表征与DGA配体功能化的新型ECR.
- 为了评估Am3+和Pu4+在酸溶液中的这些ECR的分离效率.
- 研究目标金属离子的吸附机制和脱吸行为.
主要方法:
- 在离子液中溶解的DGA配体浸到固体支上.
- 合成ECRs:TAM-3-DGA (triaza-9-crown-3与3个DGA) 和TAM-4-DGA (tetraaza-12-crown-4与4个DGA). 这两种类型的ECR的合成方法是:TAM-3-DGA和TAM-4-DGA.
- 批量吸附实验以确定树脂容量和研究吸附机制 (化学吸附).
- 使用诸如瓜尼丁碳酸盐/HEDTA 和酸之类的复合剂进行脱研究.
主要成果:
- 经过检测,ECR显示了对Eu3+ (高达9.52 mg/g) 和Pu4+ (高达7.44 mg/g) 的显著容量.
- 标示的最大载荷为Eu3+的1:1的金属/配合物复合物,为Pu4+的1:2的金属/配合物复合物.
- 在TAM-3-DGA和TAM-4-DGA树脂上,吸附遵循化学吸附机制.
- 通过使用特定的复杂化配体,实现了Eu3+和Pu4+的高效脱离.
结论:
- 开发的DGA功能化的ECR显示出对Am3+和Pu4+的选择性分离有很好的潜力.
- 使用离子液体可以提高树脂的性能,以分离活性化物.
- 这些树脂为核废物处理和管理提供了可行的解决方案.
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