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Updated: Sep 13, 2025
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Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
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Redoxable Deep Eutectic Solvent Boosts Recovery Efficiency of Neptunium
Qilong Tang1, Shuang Liu2, Huaixin Hao1
1Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
Chem & Bio Engineering
|July 30, 2025
Summary
This study introduces a novel redoxable deep eutectic solvent (DES) for efficient neptunium (Np) recovery. The DES system effectively reduces and extracts Np-(V) to Np-(IV), significantly improving nuclear waste management.
Area of Science:
- Nuclear Chemistry
- Materials Science
Background:
- Neptunium (Np) management in nuclear waste is challenging due to its variable oxidation states.
- Current methods for Np valence conversion are inefficient, hindering effective separation and recovery.
Purpose of the Study:
- To develop a novel redoxable deep eutectic solvent (DES) for efficient in situ reduction of Np-(V) in biphasic extraction systems.
- To enhance the extraction efficiency of neptunium from nuclear waste.
Main Methods:
- Design and synthesis of a novel redoxable deep eutectic solvent (DES).
- Utilizing synergistic complexation (diglycolamide ligand) and reduction (phenol) within the DES.
- Investigating the reduction of Np-(V) to Np-(IV) in a biphasic extraction system.
Main Results:
- Achieved effective in situ reduction of Np-(V) to extractable Np-(IV).
- Demonstrated a 1000-fold increase in neptunium distribution ratios.
- The developed DES showed reusability across various acidic conditions.
Conclusions:
- The novel redoxable DES system offers a promising solution for efficient neptunium recovery in nuclear waste management.
- The synergistic action of the DES components facilitates effective valence conversion and extraction.
- The DES's reusability highlights its potential for practical applications in radioactive waste treatment.
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