2002 Fiscal Year Final Research Report Summary
Formation and Migration of Actinide Colloids in Geosphere -Experiments and Quantum Chemistry Calculation-
| Project/Area Number |
12308024
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
NAGASAKI Shinya Graudate School of Frontier Sciences, Associate Professor, 大学院・新領域創成科学研究科, 助教授 (20240723)
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Shuichi Graudate School of Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (90262047)
YONEOKA Toshiaki Graudate School of Engineering, Research Associate, 大学院・工学系研究科, 助手 (40013221)
TANAKA Satoru Graudate School of Engineering, Professor, 大学院・工学系研究科, 教授 (10114547)
TSUSHIMA Satoru Graudate School of Engineering, Research Associate, 大学院・工学系研究科, 助手 (80312990)
TDORIKI Masaru Graudate School of Engineering, Research Associate, 大学院・工学系研究科, 助手 (10270886)
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| Project Period (FY) |
2000 – 2002
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| Keywords | neptunium / iron oxide colloids / colloid fomation / redox reaction / salicvlic acid / uranium / quantum chemistry |
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| Research Abstract |
The interaction between magnetite and hematite colloidal particles and neptunium(V) was studied as a function of pH, ionic strength, temperature and sorption Kinetics. The desorption behavior of Np from them was also investigated and the oxidation state of Np was experimentally determined. The surface characterization of particles were carried out As a result, it was found that Np(V) was sorbed on hematite colloidal particles as Np(V), but Np(V) was reduced to Np(IV) by Fe(II) contained in magnetite when Np(V) was sorbed on magnetite colloidal Particles.
The interaction of uranium(VI) with salicylic acids was studied by quantum chemical calculation. The optimized complex structure was determined and compared with the experimental results.
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