Motta Daniele, Mondahchouo Saïd, Nejrotti Stefano, Pontremoli Carlotta, Barolo Claudia, Damin Alessandro, Bonomo Matteo
Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, University of Turin, Turin, Italy.
Laboratory of Analytical Electrochemistry and Materials Engineering, University of Yaoundé I, Yaoundé, Cameroon.
Commun Chem. 2025 Jun 7;8(1):178. doi: 10.1038/s42004-025-01575-2.
The efficient capture and recovery of radioactive iodine (I₂) is crucial for nuclear safety and environmental protection. In this study, we propose some glycerol (Gly)-based deep eutectic solvents (DESs) as novel and promising solvents for iodine uptake from the vapour phase. Depending on the cholinium salt (Ch) selected as hydrogen bond acceptor (iodide or chloride) and its relative ratio with respect to glycerol (1:2 or 1:3), the I uptake approaches or even overcomes the 300 ms% with ChCl:Gly 1:2 showing the best performance with 4 g g after 24 h. Moreover, the captured I can be effectively (almost 80%) released showcasing the potential of DESs as iodine sponges. Finally, the exploitation of Raman spectroscopy proves the speciation of I-based species within the DES, paving the way for further engineering of these systems. Our results highlight Gly-based DES as a sustainable and cheap solvent for effective and semi-reversible I sponges.
高效捕获和回收放射性碘（I₂）对于核安全和环境保护至关重要。在本研究中，我们提出了一些基于甘油（Gly）的深共熔溶剂（DESs），作为从气相中吸收碘的新型且有前景的溶剂。根据所选作为氢键受体的胆碱盐（Ch）（碘化物或氯化物）及其相对于甘油的相对比例（1:2或1:3），碘的吸收量接近甚至超过300 mg/g，其中ChCl:Gly 1:2表现最佳，24小时后为4 g/g。此外，捕获的碘可以有效释放（几乎80%），展示了深共熔溶剂作为碘海绵的潜力。最后，拉曼光谱的研究证明了深共熔溶剂中碘基物种的形态，为这些系统的进一步工程化铺平了道路。我们的结果突出了基于甘油的深共熔溶剂作为一种可持续且廉价的溶剂，可用于有效且半可逆的碘海绵。
