2021 Fiscal Year Annual Research Report
Adsorption and separation behaviors of Cs-137 from high level liquid waste by a novel porous covalent organic frameworks (COFs) based adsorbent
| Project/Area Number |
20K22320
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| Research Institution | Tohoku University |
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Principal Investigator |
呉 昊 東北大学, 工学研究科, 助教 (70881796)
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| Project Period (FY) |
2020-09-11 – 2022-03-31
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| Keywords | COFs / calix / cesium |
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| Outline of Annual Research Achievements |
A novel composite was prepared by impregnating the 1,3-[(2,4-Diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene(calix[4]arene-R14) analogues and their molecule modifiers into a porous covalent organic frameworks (COFs) support. Its adsorption performances for selective separation of cesium (Cs) from simulated high-level liquid waste and simulated radioactive contaminated wastewater were investigated under the effect of contact time, adsorption capacity, acid concentration etc. The obtained results found that the prepared composite exhibited excellent selectivity toward Cs without the interference of other competing metal ions. The chemical stability of the COFs based support still remained intact even under highly acidic 1 M HNO3.
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