关于DBS修饰的皇冠以太基的动态柱状行为和复杂化机制的研究到90Sr
Yan Wu1, Hongji Sang1, Jiawei Zheng1
1School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Toxics
|November 24, 2023
概括
一种新型混合吸附剂有效地将 (Sr(II)) 从高水平液体废物中分离出来,回收率为99%. 这种材料在基聚合物上使用皇冠和修饰剂,具有很高的选择性,有助于废物管理.
科学领域:
- 放射化学 放射化学是指辐射化学.
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 高水平液体废物含有放射性同位素,如 (Sr(II)) 需要有效分离.
- 皇冠以选择性金属离子复合而闻名,但它们在复杂废物流中的应用需要优化.
- 混合吸附剂在具有挑战性的分离任务中提供了增强的稳定性和选择性.
研究的目的:
- 合成和表征一种新型的皇冠以太装载混合吸收剂,用于从高水平液体废物中分离.
- 为了评估吸附剂的选择性,分离效率和模拟废物中Sr (II) 的回收率.
- 通过理论计算,研究复合的机制和修饰剂的作用.
主要方法:
- 一种混合吸附剂的合成,通过将4',4'(5′′) -di(tert-butylcyclohexano) -18-crown-6 (DtBuCH18C6) 与二甲基硫酸 (DBS) 和1-dodecanol浸在基于的聚合物支上.
- 使用带有合成吸附剂和Na-DTPA化剂的包装列进行染色学分离.
- 质量平衡计算用于确定Sr (II) 和其他金属离子的回收率.
- 密度函数理论 (DFT) 计算以探索 DBS,DtBuCH18C6 和 Sr (II) 之间的相互作用机制.
主要成果:
- (DtBuCH18C6 + DBS + dodec) /SiO2-P包装的柱子实现了有效的色谱分离和从模拟的高水平液体废物中回收Sr(II).
- 二氧化的回收率约为99%,同时存在的金属离子回收率超过80%.
- DFT的计算证实,DBS作为配体,与DtBuCH18C6形成稳定的Sr(II) 复合物,增强吸附.
- 开发了一个理论模型来模拟动态突破曲线并预测扩展性能.
结论:
- 开发的混合吸附剂表现出优异的选择性和高效率,用于从高水平液体废物中分离.
- 皇冠和DBS修饰剂的协同作用显著增强了Sr (II) 的吸附.
- 该研究提供了一种可行的去除方法,以及一个可用于工业规模应用的预测模型.
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