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Title: Interactions of the Bismuthate Anion with Alkali, Alkaline Earth, Lanthanide, and Actinide Metals in Nitric Acid Systems

Journal Article · · ACS Applied Energy Materials
ORCiD logo [1]; ORCiD logo [2]
  1. Texas A&M Univ., College Station, TX (United States). Center for Nuclear Security Science & Policy Initiatives; Nuclear Engineering and Science Center, Texas A&M University
  2. Texas A&M Univ., College Station, TX (United States). Nuclear Engineering and Science Center

The solubility, dissolution, and degradation of the bismuthate anion were studied in the presence of various metal ions. A molar extinction coefficient of the bismuthate species of 11.1 ± 0.2 L mol–1 cm–1 at 527 nm was determined through modified iodometric titration methods. The dissolution rate of solid NaBiO3 was increased in the presence of smaller cations, presumably resulting from a decrease in steric hindrance during the ion-exchange reaction with Na+. Increasing the charge of the ions in solution, however, increased the stability of BiO3 in solution, reducing the rate of degradation from Bi(V) to Bi(III) with a near linear correlation as a function of countercation charge. Finally, the presence of U(VI), as UO22+, increased the BiO3 equilibrium concentration and resulted in notable changes of the BiO3 absorbance band, indicating an interaction between the uranyl cation and bismuthate anion.

Research Organization:
Texas A&M Univ., College Station, TX (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
NE0008653
OSTI ID:
1601589
Journal Information:
ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 2 Vol. 3; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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