Journal
NUCLEAR ENGINEERING AND TECHNOLOGY
Volume 52, Issue 2, Pages 328-336Publisher
KOREAN NUCLEAR SOC
DOI: 10.1016/j.net.2019.08.001
Keywords
Cesium; Separation; Adsorbent; Extractant; Crown ethers; Coordinating polymers
Categories
Funding
- National Key Research and Development Program [2016YFC1402507]
- National Natural Science Foundation of China [51578307]
- Program for Changjiang Scholars and Innovative Research Team in College [IRT13026]
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Cesium is a major product of uranium fission, which is the most commonly existed radionuclide in radioactive wastes. Various technologies have been applied to separate radioactive cesium from radioactive wastes, such as chemical precipitation, solvent extraction, membrane separation and adsorption. Crown ethers and calixarenes derivatives can selectively coordinate with cesium ions by ion-dipole interaction or cation-pi interaction, which are promising extractants for cesium ions due to their promising coordinating structure. This review systematically summarized and analyzed the recent advances in the crown ethers and calixarenes derivatives for cesium separation, especially focusing on the adsorbents based on extractants for cesium removal from aqueous solution, such as the grafting coordinating groups (e.g. crown ether and calixarenes) and coordinating polymers (e.g. MOFs) due to their unique coordination ability and selectivity for cesium ions. These adsorbents combined the advantages of extraction and adsorption methods and showed high adsorption capacity for cesium ions, which are promising for cesium separation The key restraints for cesium separation, as well as the newest progress of the adsorbents for cesium separation were also discussed. Finally, some concluding remarks and suggestions for future researches were proposed. (C) 2019 Korean Nuclear Society, Published by Elsevier Korea LLC.
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