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Journal Articles

Electrochemistry of actinide

Kitatsuji, Yoshihiro

Radioisotopes, 67(10), p.483 - 493, 2018/10

Electrochemical reactions and redox properties of actinides such as uranium and neptunium are outlined. The flow electrolysis enables rapid and high-efficient treatment. It was demonstrated to measure slow processes of actinide redox. Experimental results of electrolysis of actinide ions and the preparation method of oxidation state of the ions based on the fundamental data are described. Mediator reaction and catalysis observed in the process of electrolysis of actinide ions are also explained.

Journal Articles

Rapid and quantitative electrolytic preparation and speciation of neptunium ions of various oxidation states using multi-step column electrodes

Aoyagi, Hisao*; Kitatsuji, Yoshihiro; Yoshida, Zenko; Kihara, Sorin*

Analytica Chimica Acta, 538(1-2), p.283 - 289, 2005/05

 Times Cited Count:15 Percentile:41.49(Chemistry, Analytical)

Redox behavior of Np(III), (IV), (V) and (VI) ions in aqueous perchloric, nitric and sulphuric acid solutions was elucidated by using column electrodes connected in series in a flow system. Using a glassy carbon fiber working electrode as the column electrode was found to be very useful for the investigation of current-potential relations of not only reversible redox processes such as Np(VI)/(V) or Np(IV)/(III) but also irreversible processes such as Np(V)/(IV) or Np(V)/(III), the latter not observed by conventional voltammetry which uses a glassy carbon or platinum electrode. Quantitative electrolysis could be executed even if the redox process was completely irreversible by the use of the column electrodes. By taking advantage of column electrode electrolysis, a novel method was developed for the rapid preparation of a neptunium species of a desired oxidation state, including unstable species. The multi-step column electrode system was demonstrated to be useful for the coulometric determination and speciation of Np(IV), (V) and (VI) in aqueous HNO$$_{3}$$ solution as an example.

JAEA Reports

None

Wada, Yukio; ; ;

PNC TY8607 97-002, 158 Pages, 1997/05

PNC-TY8607-97-002.pdf:3.2MB

no abstracts in English

JAEA Reports

None

PNC TN8410 96-284, 245 Pages, 1996/03

PNC-TN8410-96-284.pdf:6.22MB

None

Journal Articles

Dissolution of plutonium dioxide by electrolytic oxidation method, II; Scaling-up experiments and purification of plutonium

Sakurai, Satoshi; Usuda, Shigekazu; ; Hirata, Masaru; ; Tachimori, Shoichi

Nihon Genshiryoku Gakkai-Shi, 35(2), p.147 - 154, 1993/02

no abstracts in English

JAEA Reports

None

Kondo, Toshiyuki; ; ;

PNC TN8410 92-018, 30 Pages, 1991/11

PNC-TN8410-92-018.pdf:0.75MB

None

Journal Articles

Reduction stripping of plutonium loaded on TBP with addition of nitrous acid

; ;

Journal of Nuclear Science and Technology, 13(6), p.321 - 326, 1976/06

 Times Cited Count:7

no abstracts in English

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