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Journal Articles

Solvent extraction of tin in nitric acids; Evaluation of multiple extractants

Ito, Kengo*; Takahashi, Shin*; Kato, Chizu*; Fukutani, Satoshi*; Matsumura, Tatsuro; Fujii, Toshiyuki*

Journal of Radioanalytical and Nuclear Chemistry, 334, p.2467 - 2475, 2025/02

https://doi.org/10.1007/s10967-025-10003-7
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

In this study, the solvent extraction behavior of tin (Sn), specifically $$^{126}$$Sn, from high-level radioactive waste was evaluated using six different extractants in a HNO$$_{3}$$ system. Among the tested extractants, N,N-Didodecyl-2-hydroxyacetoamide (HAA) exhibited higher efficiency, still not sufficient for industrial implementation. In systems where HCl was added to HNO$$_{3}$$, both tributyl phosphate (TBP) and N,N,N,N'-tetra-2-ethylhexyl diglycolamide (TEHDGA) achieved D$$_{Sn}$$ values greater than 1 at $$>$$ 1 M HCl. However, due to practical challenges in industrial applications, HAA extraction in HNO$$_{3}$$ systems, particularly at low Sn concentrations (0.0008 M), may provide a more effective solution for Sn recovery.

Journal Articles

Development of Cs separation methods from large amounts of soil samples to determine the $$^{135}$$Cs/$$^{137}$$Cs isotope ratio

Shimada, Asako; Tsukahara, Takehiko*; Nomura, Masao*; Takeda, Seiji

Journal of Radioanalytical and Nuclear Chemistry, 333(12), p.6297 - 6310, 2024/12

https://doi.org/10.1007/s10967-024-09749-3
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

Journal Articles

Solvent extraction of selenium in nitric acid; Evaluation of multiple extractants and proposal of a novel separation process

Ito, Kengo*; Kawakami, Takahiro*; Kato, Chizu*; Fukutani, Satoshi*; Matsumura, Tatsuro; Fujii, Toshiyuki*

Journal of Radioanalytical and Nuclear Chemistry, 333(10), p.5183 - 5189, 2024/10

https://doi.org/10.1007/s10967-024-09681-6
 Times Cited Count：1 Percentile：62.55(Chemistry, Analytical)

Solvent extraction behaviors of Se (VI) from nitric acid solutions were investigated with multiple extractants used for uranium, plutonium, minor actinides, and rare earthelements separation processes from high-level liquid waste. During the processes, Se remained in the residual aqueous solutions, as all extractants showed distributionratios $$<$$ 1. In contrast, Se showed distribution ratios $$>$$ 1 with $$o$$-phenylenediamine in dilute nitric acid ($$<$$ 2 M HNO$$_{3}$$), octanol as the organic phase, and concentrated nitric acid (8 M HNO$$_{3}$$) for back extraction, suggesting a potential new single separation process and recovery of Se.

Journal Articles

Application of deep metric learning model to microscope image analysis for the determination of UOC samples in nuclear forensics analysis

Kimura, Yoshiki; Matsumoto, Tetsuya*; Yamaguchi, Tomoki

Journal of Radioanalytical and Nuclear Chemistry, 333(7), p.3541 - 3551, 2024/07

https://doi.org/10.1007/s10967-023-09300-w
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

Journal Articles

Development of a non-destructive carbon quantification method in iron by negative muon lifetime measurement

Ninomiya, Kazuhiko*; Kubo, Kenya*; Inagaki, Makoto*; Yoshida, Go*; Takeshita, Soshi*; Tampo, Motonobu*; Shimomura, Koichiro*; Kawamura, Naritoshi*; Strasser, P.*; Miyake, Yasuhiro*; et al.

Journal of Radioanalytical and Nuclear Chemistry, 333(7), p.3445 - 3450, 2024/07

https://doi.org/10.1007/s10967-023-09289-2
 Times Cited Count：1 Percentile：62.55(Chemistry, Analytical)

Journal Articles

Investigation of adsorption mechanism of Mo(VI) by baker's yeast and applicability to the uranium liquid waste treatment process

Arai, Yoichi; Hasegawa, Kenta; Watanabe, So; Watanabe, Masayuki; Minowa, Kazuki*; Matsuura, Haruaki*; Hagura, Naoto*; Katsuki, Kenta*; Arai, Tsuyoshi*; Konishi, Yasuhiro*

Journal of Radioanalytical and Nuclear Chemistry, 333(7), p.3585 - 3593, 2024/07

https://doi.org/10.1007/s10967-023-09278-5
 Times Cited Count：1 Percentile：27.70(Chemistry, Analytical)

Journal Articles

Water extraction of technetium-99m from neutron irradiated porous molybdenum dioxide pellet

Hu, X.*; Fujita, Yoshitaka; Tsuchiya, Kunihiko; Fukutani, Satoshi*; Hori, Junichi*; Suzuki, Tatsuya*

Journal of Radioanalytical and Nuclear Chemistry, 333(11), p.6057 - 6063, 2024/05

https://doi.org/10.1007/s10967-024-09529-z
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

no abstracts in English

Journal Articles

$$^{137}$$Cs contamination of Japanese mustard spinach by resuspended particles in areas with different contamination conditions

Tatsuno, Takahiro*; Yoshimura, Kazuya; Nihei, Naoto*

Journal of Radioanalytical and Nuclear Chemistry, 333(3), p.1089 - 1096, 2024/03

https://doi.org/10.1007/s10967-023-09347-9
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

Journal Articles

Effect of $$^{226}$$Ra purity as a target for $$^{225}$$Ac production using a fast reactor

Sasaki, Yuto; Maeda, Shigetaka

Journal of Radioanalytical and Nuclear Chemistry, 333, p.5987 - 5996, 2024/02

https://doi.org/10.1007/s10967-024-09397-7
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

Researchers are seeking alternative $$^{225}$$Ac production methods because of the scarcity of $$^{225}$$Ac for targeted alpha therapy. Although $$^{226}$$Ra from waste sources has been considered, obtaining $$^{226}$$Ra is challenging. Therefore, the authors focused on the contamination of minerals with $$^{232}$$Th-derived $$^{228}$$Ra while investigating methods to recover $$^{226}$$Ra from uranium ores. The effect of 228Ra contamination on $$^{225}$$Ac production by $$^{226}$$Ra transmutation using fast reactors was evaluated. Consequently, toxic $$^{228}$$Ac contaminates $$^{225}$$Ac. However, using the different half-lives of $$^{225}$$Ac and $$^{228}$$Ac, pure $$^{225}$$Ac can be obtained from the chemical separation of actinium after cooling for 5-8 days.

Journal Articles

Extraction of $$^{99}$$Mo hot atoms made by a neutron capture method from $$alpha$$-MoO$$_{3}$$ to water

Quach, N. M.*; Ngo, M. C.*; Yang, Y.*; Nguyen, T. B.*; Nguyen, V. T.*; Fujita, Yoshitaka; Do, T. M. D.*; Nakayama, Tadachika*; Suzuki, Tatsuya*; Suematsu, Hisayuki*

Journal of Radioanalytical and Nuclear Chemistry, 332(10), p.4057 - 4064, 2023/10

https://doi.org/10.1007/s10967-023-09125-7
 Times Cited Count：3 Percentile：65.16(Chemistry, Analytical)

Technetium-99m ($$^{99m}$$Tc) is the most widely used medical radioisotope in the world and is produced from molybdenum-99 ($$^{99}$$Mo). Production of $$^{99}$$Mo via the neutron capture method draws attention as an alternative to fission-derived $$^{99}$$Mo due to non-proliferation issues, but the specific radioactivity of $$^{99}$$Mo is extremely low. In this work, a porous $$alpha$$-MoO$$_{3}$$ wire was prepared as an irradiation target in order to improve the specific activity by extracting $$^{99}$$Mo. Porous $$alpha$$-MoO$$_{3}$$ wire is synthesized from Mo metal wire by a two-step heating procedure. The hot atom effect of $$^{99}$$Mo was confirmed by activity and isotope measurements of the porous $$alpha$$-MoO$$_{3}$$ wire after neutron irradiation and the water used for extraction. In term of the extraction effectiveness, the effectiveness of $$^{99}$$Mo extraction in the porous $$alpha$$-MoO$$_{3}$$ wire was comparable to that of commercial $$alpha$$-MoO$$_{3}$$ powder.

Journal Articles

Development of correction method for sample density effect on PGA

Maeda, Makoto; Segawa, Mariko; Toh, Yosuke; Endo, Shunsuke; Nakamura, Shoji; Kimura, Atsushi

Journal of Radioanalytical and Nuclear Chemistry, 332(8), p.2995 - 2999, 2023/08

https://doi.org/10.1007/s10967-023-08961-x
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

Journal Articles

$$^{137}$$Cs transfer from soils contaminated by resuspended particles to Japanese mustard spinach in difficult-to-return zone of Fukushima

Tatsuno, Takahiro*; Nihei, Naoto*; Yoshimura, Kazuya; Ote, Nobuhito*

Journal of Radioanalytical and Nuclear Chemistry, 332(6), p.1677 - 1686, 2023/06

https://doi.org/10.1007/s10967-023-08899-0
 Times Cited Count：1 Percentile：27.70(Chemistry, Analytical)

Journal Articles

Origin of Cs-bearing silicate glass microparticles observed during Fukushima accident and recommendations on nuclear safety

Hidaka, Akihide

Journal of Radioanalytical and Nuclear Chemistry, 332(6), p.1607 - 1623, 2023/03

https://doi.org/10.1007/s10967-023-08846-z
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

no abstracts in English

Journal Articles

Water contents in aggregates and cement pastes determined by gravimetric analysis and prompt $$gamma$$-ray analysis

Kinoshita, Norikazu*; Noto, Takuma*; Nakajima, Hitoshi*; Kosako, Kazuaki*; Kato, Takahiro*; Kuroiwa, Yoichi*; Kurabe, Misako*; Sasaki, Yuki*; Torii, Kazuyuki*; Maeda, Makoto; et al.

Journal of Radioanalytical and Nuclear Chemistry, 332(2), p.479 - 486, 2023/02

https://doi.org/10.1007/s10967-023-08776-w
 Times Cited Count：2 Percentile：27.70(Chemistry, Analytical)

Journal Articles

Formation of MPd$$_{3+x}$$ (M = Gd, Np) by the reaction of MN with Pd and chlorination of MPd$$_{3+x}$$ using cadmium chloride

Hayashi, Hirokazu; Shibata, Hiroki; Sato, Takumi; Otobe, Haruyoshi

Journal of Radioanalytical and Nuclear Chemistry, 332(2), p.503 - 510, 2023/02

https://doi.org/10.1007/s10967-023-08760-4
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

The formation of MPd$$_{3+x}$$ (M = Gd, Np) by the reaction of MN with Pd at 1323 K in Ar gas flow was observed. Cubic AuCu$$_3$$-type GdPd$$_{3.3}$$ (${it a}$ = 0.4081 $$pm$$ 0.0001 nm) and NpPd$$_3$$ (${it a}$ = 0.4081 $$pm$$ 0.0001 nm) were identified, respectively. The product obtained from the reaction of NpN with Pd contained additional phases including the hexagonal TiNi$$_3$$-type NpPd$$_3$$. Chlorination of the MPd$$_{3+x}$$ (M = Gd, Np) samples was accomplished by the solid-state reaction using cadmium chloride at 673 K in a dynamic vacuum. Pd-rich solid solution phase saturated with Cd and an intermetallic compound PdCd were obtained as by-products of MCl$$_3$$ formation.

Journal Articles

Development of HCl-free solid phase extraction combined with ICP-MS/MS for rapid assessment of difficult-to-measure radionuclides, 2; Highly sensitive monitoring of $$^{126}$$Sn in concrete rubble

Do, V. K.; Furuse, Takahiro; Ota, Yuki; Iwahashi, Hiroyuki; Hirosawa, Takashi; Watanabe, Masahisa; Sato, Soichi

Journal of Radioanalytical and Nuclear Chemistry, 331(12), p.5631 - 5640, 2022/12

https://doi.org/10.1007/s10967-022-08612-7
 Times Cited Count：4 Percentile：54.60(Chemistry, Analytical)

$$^{126}$$Sn is one of the long-lived fission products that might have been released into the environment after the Fukushima nuclear accident in Japan in 2011. The presence of radionuclides must be monitored for the proper treatment of wastes obtained from decommissioning accident-related nuclear facilities and the surrounding environment. In the work, we propose a reliable method for verifying the presence of $$^{126}$$Sn in construction materials by combining the HCl-free solid phase extraction on TEVA resin and a selective measurement by inductively coupled plasma tandem mass spectrometry (ICP-MS/MS). The method has been optimized and characterized step by step. More than 95% of chemical recovery was achieved for Sn from typical concrete matrixes. The interference caused by an isobar $$^{126}$$Te and possible polyatomic interferences from matrixes were effectively suppressed by the developed chemical separation and the tandem MS/MS configuration. The total decontamination factor for the Te interference was of the order of 10$$^{5}$$. The estimated method detection limit for $$^{126}$$Sn in concrete as measured at m/z = 160 was 12.1 pg g$$^{-1}$$, which is equivalent to 6.1 mBq g$$^{-1}$$.

Journal Articles

Design of MA(III)/Ln(III) separation process of extraction chromatography technology

Akuzawa, Tadashi*; Kim, S.-Y.*; Kubota, Masahiko*; Wu, H.*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki; Arai, Tsuyoshi*

Journal of Radioanalytical and Nuclear Chemistry, 331(12), p.5851 - 5858, 2022/12

https://doi.org/10.1007/s10967-022-08658-7
 Times Cited Count：5 Percentile：63.07(Chemistry, Analytical)

Journal Articles

The Formation mechanism of radiocesium-bearing microparticles derived from the Fukushima Daiichi Nuclear Power Plant using electron microscopy

Hagiwara, Hiroki; Kondo, Keietsu; Hidaka, Akihide

Journal of Radioanalytical and Nuclear Chemistry, 331(12), p.5905 - 5914, 2022/12

https://doi.org/10.1007/s10967-022-08434-7
 Times Cited Count：3 Percentile：44.16(Chemistry, Analytical)

Journal Articles

Potential bacterial alteration of nuclear fuel debris; A Preliminary study using simulants in powder and pellet forms

Liu, J.; Dotsuta, Yuma; Sumita, Takehiro; Kitagaki, Toru; Onuki, Toshihiko; Kozai, Naofumi

Journal of Radioanalytical and Nuclear Chemistry, 331(6), p.2785 - 2794, 2022/06

https://doi.org/10.1007/s10967-022-08324-y
 Times Cited Count：4 Percentile：54.60(Chemistry, Analytical)

Remnant nuclear fuel debris in the damaged nuclear reactors at the Fukushima Daiichi Nuclear Power Plant (FDNPP) has contacted the groundwater containing microorganisms for over ten years. Herein, we report the possibility of bacterial alteration of fuel debris. We investigated the physical and chemical changes of fuel debris simulants (FDS) in the powder and pellet forms via exposure to two ubiquitous bacteria, Pseudomonas fluorescens and Bacillus subtilis. In the experiments using FDS composed of the powders of Fe(0), solid solution of CeO$$_{2}$$ and ZrO$$_{2}$$, and SiO$$_{2}$$, Ce, Zr, and Si were hardly dissolved, while Fe was dissolved, a fraction of the dissolved Fe was present in the liquid phase as Fe(II) and Fe(III), and the rest was precipitated as the nano-sized particles of iron (hydr)oxides. In the experiment using P. fluorescens and FDS pellet pieces prepared by melting the Fe(0) particles and solid solution of CeO$$_{2}$$ and ZrO$$_{2}$$, the bacteria selectively gathered on the Fe(0) particle surface and made corrosion pits. These results suggest that bacteria in groundwater corrode the iron in fuel debris at FDNPP, change fuel debris into porous one, releasing the nano-sized iron (hydr)oxide particles into the water.

Journal Articles

Complex formation of light and heavy lanthanides with DGA and DOODA, and its application to mutual separation in DGA-DOODA extraction system

Nomizu, Daiki; Sasaki, Yuji; Kaneko, Masashi; Matsumiya, Masahiko*; Katsuta, Shoichi*

Journal of Radioanalytical and Nuclear Chemistry, 331(3), p.1483 - 1493, 2022/03

https://doi.org/10.1007/s10967-022-08204-5
 Times Cited Count：7 Percentile：75.64(Chemistry, Analytical)

We studied the successive formation of water soluble DGA (diglycolamide) and DOODA (dioxaoctanediamide) for the mutual separation of Ln in this extraction system. TODGA (tetraoctyl-diglycolamide) and DOODA(C8) (tetraoctyl-dioxaoctanediamide) have the opposite trend to extract light and heavy Ln through Ln-patterns. Metal-complexes of two folding Ln ions with water-soluble DOODA and three folding with DGA are found and their observed formation constants are calculated. The suitable separation condition (aqueous phase: 30 mM DOODA(C2) in 1 M nitric acid, organic phase: 0.1 M TODGA in n-dodecane) of multi-stage extraction (10 $$times$$ 10) is conducted. From the present work, it is clear that La, Pr and Nd are mainly present in aqueous phase, instead Sm-Dy exist in the organic phase.

276 (Records 1-20 displayed on this page)