Highly efficient and selective capture of TcO4− or ReO4− by imidazolium-based ionic liquid polymers
| Autor: | Zhenning Lou, Ying Xiong, Wenyan Zhao, Yuejiao Wang, Weijun Shan, Mengnan Huang, Kan Lixin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
General Chemical Engineering Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry Polymer Rhenium 010402 general chemistry 021001 nanoscience & nanotechnology Alkali metal 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Molybdenum Selective adsorption Ionic liquid Environmental Chemistry 0210 nano-technology Selectivity |
| Zdroj: | Chemical Engineering Journal. 421:127763 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2020.127763 |
| Popis: | 99Technetium (99Tc) is one of the most dangerous radioactive isotopes in the legacy nuclear waste, and harmful to the environment and human health. Effectively removing it remains a long-term challenge. Herein a resin-like imidazolium-based ionic liquid polymer (DVB-2C8VEIMBr) was prepared for selective adsorption of TcO4− (ReO4− as an alternative for laboratory operation). It is manifested that DVB-2C8VEIMBr integrates high adsorption capacity (313.28 mg·g−1) and selectivity (90.68% in 6000 times excess of SO42− ions). A real-scenario experiment exhibits DVB-2C8VEIMBr can remove up to 93% of TcO4− from the simulated Hanford LAW scrubber solution. More importantly, DVB-2C8VEIMBr displays super acid and alkaline resistance and stability after immersing for 8 months under extreme conditions of 3 M HCl and 2 M NaOH. It can also effectively separate rhenium from molybdenum solution in the range of 3 M HCl - pH 2. Additionally, it still showed perfect regeneration performance after 10 cycles. In particular, this work demonstrates the feasibility of imidazolium-based ionic liquid adsorbents in the TcO4− or ReO4− immobilization process, which can be applied to capture these radioactive oxygen anions under high acid and high alkali conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect