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| Cyclic Mild Elution of Uranium Contaminated Soil by Citric Acid Combined with Uranyl Ion Imprinting Material |
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Received:August 25, 2023
Revised:September 13, 2023
Accepted:September 14, 2023
Published Online:November 30, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2024.01.015 |
| KeyWord:U; organic acid; chemical elution; soil; stability |
| Author | Institution |
| TAO Liang |
东华理工大学 |
| LI Yiran |
东华理工大学 |
| JIANG Hao |
东华理工大学 |
| YU Yibin |
东华理工大学 |
| CHEN Haobing |
东华理工大学 |
| ZHAO Liming |
东华理工大学 |
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| Abstract: |
| With the mining of uranium ore, the radioactive contamination of soil around the mine has caused serious impact on the ecological environment and human health. The method of elution uranium containing soil by citric acid combined with uranyl ion imprinting material can gently and efficiently remove uranium from the soil around mines. The results show that in pH=4 elution environment, the removal rate of uranium by mild cycle leaching system is 89.92%, while that by citric acid leaching is only 59.6%. Compared with single citric acid leaching, the time to reach equilibrium is reduced by 20 hours, and the washing rate of conventional elements in the soil is reduced by 10 percentage points. At the same time, in the traditional chemical leaching method, the input of citric acid is usually about 20~100 g/L, while in this experiment, the citric acid input is only 15 g/L, which has a very high cost advantage. |
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