Fundamental Chemistry of U and Pu in the TBP-Dodecane-Nitric Acid System

Authors

Kenneth Czerwinski, University of Nevada, Las VegasFollow

Document Type

Annual Report

Publication Date

2007

First page number:

56

Last page number:

57

Abstract

The research objective is to experimentally evaluate the fundamental speciation of Pu and U in the TBP-dodecane-nitric acid- AHA system and the effect of pertechnetate, specifically:

To determine the influence of nitrate on the speciation of U and Pu in the TBP-dodecane-nitric acid system. The aqueous and organic speciation of U and Pu are examined as a function of the nitric acid concentration, nitrate concentration, actinide ion concentration, temperature, and time.

To determine the speciation of U and Pu with AHA in the presence and absence of TBP-dodecane organic phase. The aqueous and organic speciation of U and Pu are evaluated as a function of AHA concentration, metal ion concentration, metal ion redox state, pH, and temperature.

To determine the interaction of AHA with pertechnetate, and the effect on the interaction of AHA and pertechnetate with U and Pu.

To incorporate thermodynamic and kinetic data into existing modeling codes. All of the initial experiments were performed with uranyl, UO₂²⁺. The results obtained from U are the basis for further experiments with Pu. In extraction experiments, the aqueous and organic phases are contacted in equal volumes from 0.3 to 5.0 mL.

Keywords

Nitric acid; Plutonium; Radioactive wastes – Purification; Separation (Technology); Speciation (Chemistry); Tributyl phosphate; Uranium

Controlled Subject

Nitric acid; Radioactive wastes--Purification; Tributyl phosphate

Disciplines

Analytical Chemistry | Chemistry | Oil, Gas, and Energy | Physical Chemistry | Radiochemistry

File Format

pdf

File Size

201 KB

Language

English

Rights

COPYRIGHT UNDETERMINED. For more information about this rights statement, please visit http://rightsstatements.org/vocab/UND/1.0/

Repository Citation

Czerwinski, K. (2007). Fundamental Chemistry of U and Pu in the TBP-Dodecane-Nitric Acid System. 56-57.
Available at: https://digitalscholarship.unlv.edu/hrc_trp_separations/92