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Filtering by: Creator Paulenova, Alena Resource Type Article

The redox chemistry of neptunium in γ-irradiated aqueous nitric acid in the presence of an organic phase

Creator:

Mincher, Bruce J., Precek, Martin, and Paulenova, Alena

Abstract:

The radiolytic changes in oxidation state for solutions of initially Np(V) and/or Np(VI) were investigated by gamma-irradiation in conjunction with UV/Vis spectroscopy of the aqueous phase. Samples were irradiated in varying concentrations of nitric acid, and with or without the presence of 30 % TBP in dodecane. At short irradiation...

Resource Type:

Article

Full Text:

• Martin Precek2,3 • Alena Paulenova2 Received: 17 August 2015 / Published online: 17 October 2015
Aqueous Complexation of Thorium(IV), Uranium(IV), Neptunium(IV), Plutonium(III/IV), and Cerium(III/IV) with DTPA

Creator:

Brown, M. Alex, Paulenova, Alena, and Gelis, Artem V.

Abstract:

Aqueous complexation of Th(IV), U(IV), Np(IV), Pu(III/IV), and Ce(III/IV) with DTPA was studied by potentiometry, absorption spectrophotometry, and cyclic voltammetry at 1 M ionic strength and 25 °C. The stability constants for the 1:1 complex of each trivalent and tetravalent metal were calculated. From the potentiometric data, we report stability...

Resource Type:

Article

Full Text:

), Neptunium(IV), Plutonium(III/IV), and Cerium(III/IV) with DTPA M. Alex Brown,† Alena Paulenova,‡ and Artem V