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Search Results: Records 1-7 displayed on this page of 7
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Journal Articles

Evaluation of Aluminum Hexacyanoferrate utilization for PGM and Mo removal from simulated high-level-raffinates in reprocessing for repository area minimization

Nakase, Masahiko*; Mishima, Ria; Abe, Takumi; Okamura, Tomohiro*; Asano, Hidekazu*

Annals of Nuclear Energy, 224, p.111569_1 - 111569_14, 2025/12

https://doi.org/10.1016/j.anucene.2025.111569
 Times Cited Count：1 Percentile：0.00(Nuclear Science & Technology)

Journal Articles

Recovery of rhodium by solvent extraction using $$N, N, N', N', N", N"$$-hexahexyl-nitrilotriacetamide and electrodeposition

Matsumiya, Masahiko*; Tokumitsu, Shun*; Mishima, Takumi*; Sasaki, Yuji

ECS Advances (Internet), 3(4), p.043001_1 - 043001_8, 2024/12

https://doi.org/10.1149/2754-2734/ad86cd

The extraction behavior of Rh(III) with Hexahexyl-nitrilotriacetamide, NTAamide(C6) was investigated in three different diluents (acetophenone, AP, 1,2-dichloroethane, DCE, and 1-octanol, OC). The electrochemical behavior of the extracted Rh(III) complex in each diluent was investigated from linear sweep voltammetry. It was revealed that Rh(III) was reduced to Rh(0) metal by a three electron transfer in NTAamide(C6)/AP, DCE and OC system. The electrodeposits can be recovered from continuous solvent extraction and direct electrodeposition. The electrodeposits were identified by XPS and XRD analyses as mainly Rh metal.

Journal Articles

Solvation structure and thermodynamics for Ln(III), (Ln=Pr, Nd, Tb and Dy) complexes in phosphonium-based ionic liquids evaluated by Raman spectroscopy and DFT calculation

Tokumitsu, Shun*; Mishima, Takumi*; Matsumiya, Masahiko*; Sasaki, Yuji

Journal of Molecular Liquids, 414, Part A, p.126150_1 - 126150_8, 2024/11

https://doi.org/10.1016/j.molliq.2024.126150

The coordination states of Ln(III), (Ln=Pr, Nd, Tb and Dy) in ILs were investigated by Raman spectroscopy. The thermodynamic properties for the isomerism of [TFSA]- from trans- to cis-isomer were evaluated. The cis-[TFSA]- conformer bound to Ln3+ cation was the preferred coordination state of [Ln(III)(cis-TFSA)5]2-. The bonding energies of [Ln(III)(cis-TFSA)5]2-, (Ln=Pr, Nd, Tb and Dy) were estimated from DFT calculation.

Oral presentation

None

Mishima, Ria; Okamura, Tomohiro*; Abe, Takumi; Nakase, Masahiko*

no journal, , 

no abstracts in English

Oral presentation

High-temperature reaction of Gd$$_{0.25}$$Zr$$_{0.75}$$N with Pd

Mishima, Ria; Shibata, Hiroki; Sato, Takumi; Hayashi, Hirokazu

no journal, , 

no abstracts in English

Oral presentation

Development of international software platform for providing environmental monitoring data

Seki, Akiyuki; Saito, Osamu; Suzuki, Kenta; Tomishima, Katsuya; Munakata, Toshihiko; Ajima, Takumi; Saito, Kimiaki; Takemiya, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

High-temperature reaction of Gd$$_{0.25}$$Zr$$_{0.75}$$N with Pd, 2; Temperature dependence of the reaction product composition

Mishima, Ria; Sato, Takumi; Hayashi, Hirokazu

no journal, , 

no abstracts in English

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