Facile and Efficient Decontamination of Thorium from Rare Earths Based on Selective Selenite Crystallization
文献类型：期刊论文
| 作者 | Lu, Huangjie; Juan Diwu; Chen, Lanhua; Yin, Xuemiao; Cai, Yawen; Bai, Xiaojing; Tao Duan; Xing Dai; Wang, Yaxing; Shuao Wang |
| 刊名 | INORGANIC CHEMISTRY
 |
| 出版日期 | 2018 |
| 卷号 | 57期号:4页码:1880-1887 |
| 关键词 | Generalized Gradient Approximation Basis-sets Licl-kcl Separation Elements Density Molecules Uranium Chemistry Pseudopotentials |
| 英文摘要 | The coexistence of radioactive contaminants (e.g., thorium, uranium, and their daughters) in rare earth minerals introduces significant environmental, economic, and technological hurdles in modern rare earth production. Efficient, low cost, and green decontamination strategies are therefore desired to ameliorate this problem. We report here a single-step and quantitative decontamination strategy of thorium from rare earths based on a unique periodic trend in the formation of crystalline selenite compounds across the lanthanide series, where Ce(III) is fully oxidized in situ to Ce(IV). This gives rise to a crystallization system that is highly selective to trap tetravalent f-blocks while all other trivalent lanthanides completely remain in solution when coexist. These results are bolstered by first-principles calculations of lattice energies and an examination of bonding in these compounds. This system is contrasted with typical natural and synthetic systems, where trivalent and tetravalent f-block elements often cocrystallize. The separation factors after one round of crystallization were determined from binary systems of Th(IV)/La(III), Th(IV)/Eu(III), and Th(IV)/Yb(III) to reach 2.1 X 10(5), 1.2 x 10(5), and 9 x 10(4), respectively. Selective crystallization of thorium from a simulated monazite composite yields a separation factor of 1.9 x 10(3) with nearly quantitative removal of thorium. |
| 学科主题 | Electrochemistry |
| 语种 | 英语 |
| 公开日期 | 2018-12-04 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/16806]  |
| 专题 | 2018专题 |
| 推荐引用方式 GB/T 7714 | Lu, Huangjie,Juan Diwu,Chen, Lanhua,et al. Facile and Efficient Decontamination of Thorium from Rare Earths Based on Selective Selenite Crystallization[J]. INORGANIC CHEMISTRY,2018,57(4):1880-1887. |
| APA | Lu, Huangjie.,Juan Diwu.,Chen, Lanhua.,Yin, Xuemiao.,Cai, Yawen.,...&Du, Shiyu.(2018).Facile and Efficient Decontamination of Thorium from Rare Earths Based on Selective Selenite Crystallization.INORGANIC CHEMISTRY,57(4),1880-1887. |
| MLA | Lu, Huangjie,et al."Facile and Efficient Decontamination of Thorium from Rare Earths Based on Selective Selenite Crystallization".INORGANIC CHEMISTRY 57.4(2018):1880-1887. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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