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Homogeneous immobil...
Homogeneous immobilization of simulated actinides in rhabdophane and comparison of its leaching stability with monazite
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- Zheng, Qiuyu (author)
- Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China.;Southwest Univ Sci & Technol, Sch Mat & Chem, Mianyang 621010, Peoples R China.
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- Zhao, Xiaofeng (author)
- Uppsala universitet,Materialteori,Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China.;Southwest Univ Sci & Technol, Sch Mat & Chem, Mianyang 621010, Peoples R China.
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- Liu, Yang (author)
- China Aerodynam Res & Dev Ctr, Mianyang 621000, Peoples R China.
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- Teng, Yuancheng (author)
- Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China.;Southwest Univ Sci & Technol, Sch Mat & Chem, Mianyang 621010, Peoples R China.
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- Li, Yuxiang (author)
- Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China.;Southwest Univ Sci & Technol, Sch Mat & Chem, Mianyang 621010, Peoples R China.
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- Liu, Guangyuan (author)
- China Aerodynam Res & Dev Ctr, Mianyang 621000, Peoples R China.
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- Zheng, Xiayu (author)
- Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China.;Southwest Univ Sci & Technol, Sch Mat & Chem, Mianyang 621010, Peoples R China.
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- Luo, Wei (author)
- Uppsala universitet,Materialteori
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- Ahuja, Rajeev, 1965- (author)
- Uppsala universitet,Materialteori,Teoretisk fysik,Indian Inst Technol Ropar, Dept Phys, Rupnagar 140001, Punjab, India.
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Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China;Southwest Univ Sci & Technol, Sch Mat & Chem, Mianyang 621010, Peoples R China. Materialteori (creator_code:org_t)
- Elsevier BV, 2023
- 2023
- English.
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In: Progress in nuclear energy (New series). - : Elsevier BV. - 0149-1970 .- 1878-4224. ; 160
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Rhabdophane LnPO(4)center dot 0.667H(2)O (Ln = La to Dy) is an important precipitation-enrichment barrier to isolate actinides from groundwater. However, the bearing capacity of different actinides in rhabdophane has been poorly understood due to the complex coordination environment induced by water molecules. In this work, the precipitation behaviors of NdxSmxLa(1-2x)PO(4)center dot 0.667H(2)O (x = 0.1-0.5) solid solutions are systematically investigated to understand the simulated actinides occupancy and the chemical precipitation processes. The results show that Nd3+ and Sm3+ can be removed over 99% after 12 h in an approximate pH = 1 solution. NdxSmxLa12xPO4 center dot 0.667H(2)O single-phase has been observed by refined XRD, although the composition distribution of nanograins is extremely uneven. The distribution of simulated actinides can be homogeneous after prolonging reaction time to 12 days or sintering temperature over 1000.C. Both Nd3+ and Sm3+ are preferentially incorporated on non-hydrated lattice sites when x = 0.1. Besides, the chemical stability of La0.332Nd0.334Sm0.334PO4 center dot 0.667H(2)O rhabdophane is compared with associated monazite to understand the leaching activities of simulated actinides incorporated on hydrated and non-hydrated sites. The leaching rates of monazite are smaller than that of rhabdophane, suggesting that [LnO(9)] polyhedrons in monazite have a stronger energy threshold than [LnO(8)] and [LnO(8)center dot H2O] polyhedrons in rhabdophane.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- Rhabdopahne
- Monazite
- Removal rate
- Occupancy
- Leaching stability
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Zheng, Qiuyu
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Zhao, Xiaofeng
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Liu, Yang
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Teng, Yuancheng
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Li, Yuxiang
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Liu, Guangyuan
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Zheng, Xiayu
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Luo, Wei
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Ahuja, Rajeev, 1 ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
- Articles in the publication
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Progress in nucl ...
- By the university
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Uppsala University