Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide Fluid
Alkali residue was dissolved by the ammonium hydrogen fluoride method, in which the uranium content is determined to be (16.7±0.3)%(n=6) by inductively coupled plasma optical emission spectrometry(ICP-AES). By means of XRD and SEM-EDS, the main uranium occurrence form of alkali residue was determine...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Nuclear and Radiochemistry
2023-06-01
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| Series: | He huaxue yu fangshe huaxue |
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| Online Access: | http://www.jnrc.org.cn/CN/10.7538/hhx.2023.45.03.0184 |
| _version_ | 1827292046614855680 |
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| author | GANG Fa-yuan SONG Zhi-jun DING You-qian WANG Xiu-feng YU Zhen-hua SUN Xue-jie BAI Long |
| author_facet | GANG Fa-yuan SONG Zhi-jun DING You-qian WANG Xiu-feng YU Zhen-hua SUN Xue-jie BAI Long |
| author_sort | GANG Fa-yuan |
| collection | DOAJ |
| description | Alkali residue was dissolved by the ammonium hydrogen fluoride method, in which the uranium content is determined to be (16.7±0.3)%(n=6) by inductively coupled plasma optical emission spectrometry(ICP-AES). By means of XRD and SEM-EDS, the main uranium occurrence form of alkali residue was determined. It includes UO3, fluoride(CaF2, NaF, MgF2, UF4, etc), SiO2-P2O5-UO3, Cr2O3-Fe2O3 and other solid melts, and the forms of UO3 being wrapped by the above solid melts. Using TBP-HNO3 as complexing agent, the effects of various parameters were investigated on the lab-scale supercritical CO2 fluid extraction facility. The extraction parameters are optimized: the particle size is 0.250-0.420 mm, saturated Al(NO3)3 solution of w=25% alkali residue is used as salting agent, the mole ratio of TBP-HNO3/U is ≥50, the extraction temperature is 50 ℃ and the pressure is 20 MPa. Under these conditions, the extraction rate of uranium in the alkali residue reaches as high as 98.5% within 2 h. This work provides a new method for the recovery of uranium in alkali residue. |
| first_indexed | 2024-03-12T22:24:16Z |
| format | Article |
| id | doaj.art-001babf4da4d4b1e986df4c767f70283 |
| institution | Directory Open Access Journal |
| issn | 0253-9950 |
| language | zho |
| last_indexed | 2024-04-24T12:49:34Z |
| publishDate | 2023-06-01 |
| publisher | Editorial Office of Journal of Nuclear and Radiochemistry |
| record_format | Article |
| series | He huaxue yu fangshe huaxue |
| spelling | doaj.art-001babf4da4d4b1e986df4c767f702832024-04-06T05:48:46ZzhoEditorial Office of Journal of Nuclear and RadiochemistryHe huaxue yu fangshe huaxue0253-99502023-06-0145318419010.7538/hhx.2023.45.03.0184Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide FluidGANG Fa-yuan0SONG Zhi-jun1DING You-qian2WANG Xiu-feng3YU Zhen-hua4SUN Xue-jie5BAI Long 6China Institute of Atomic EnergyChina Institute of Atomic EnergyChina Institute of Atomic EnergyChina Institute of Atomic EnergyChina Institute of Atomic EnergyChina Institute of Atomic EnergyChina Institute of Atomic EnergyAlkali residue was dissolved by the ammonium hydrogen fluoride method, in which the uranium content is determined to be (16.7±0.3)%(n=6) by inductively coupled plasma optical emission spectrometry(ICP-AES). By means of XRD and SEM-EDS, the main uranium occurrence form of alkali residue was determined. It includes UO3, fluoride(CaF2, NaF, MgF2, UF4, etc), SiO2-P2O5-UO3, Cr2O3-Fe2O3 and other solid melts, and the forms of UO3 being wrapped by the above solid melts. Using TBP-HNO3 as complexing agent, the effects of various parameters were investigated on the lab-scale supercritical CO2 fluid extraction facility. The extraction parameters are optimized: the particle size is 0.250-0.420 mm, saturated Al(NO3)3 solution of w=25% alkali residue is used as salting agent, the mole ratio of TBP-HNO3/U is ≥50, the extraction temperature is 50 ℃ and the pressure is 20 MPa. Under these conditions, the extraction rate of uranium in the alkali residue reaches as high as 98.5% within 2 h. This work provides a new method for the recovery of uranium in alkali residue.http://www.jnrc.org.cn/CN/10.7538/hhx.2023.45.03.0184alkali residuesupercritical co2 fluid extractionuranium |
| spellingShingle | GANG Fa-yuan SONG Zhi-jun DING You-qian WANG Xiu-feng YU Zhen-hua SUN Xue-jie BAI Long Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide Fluid He huaxue yu fangshe huaxue alkali residue supercritical co2 fluid extraction uranium |
| title | Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide Fluid |
| title_full | Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide Fluid |
| title_fullStr | Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide Fluid |
| title_full_unstemmed | Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide Fluid |
| title_short | Extraction of Uranium From Alkali Residue With Supercritical Carbon Dioxide Fluid |
| title_sort | extraction of uranium from alkali residue with supercritical carbon dioxide fluid |
| topic | alkali residue supercritical co2 fluid extraction uranium |
| url | http://www.jnrc.org.cn/CN/10.7538/hhx.2023.45.03.0184 |
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