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

Jeffrey D. Einkauf; Jonathan D. Burns

doi:10.1021/acsaem.9b02078

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

Jeffrey D. Einkauf, Jonathan D. Burns

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

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. The presence of U(VI), as UO₂ ²⁺, 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.

Original language	English
Pages (from-to)	1593-1601
Number of pages	9
Journal	ACS Applied Energy Materials
Volume	3
Issue number	2
DOIs	https://doi.org/10.1021/acsaem.9b02078
State	Published - Feb 24 2020
Externally published	Yes

Funding

This work was sponsored by the Nuclear Energy University Program, Office of Nuclear Energy, U.S. Department of Energy, under Award No. DE-NE0008653, for which the authors are very grateful. This submitted article has been authored by Texas A&M University, under Award No. DE-NE0008653 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy	DE-NE0008653
Office of Nuclear Energy
Nuclear Energy University Program

Keywords

actinides
bismuthate
complexation
solubility
stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsaem.9b02078

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title = "Interactions of the Bismuthate Anion with Alkali, Alkaline Earth, Lanthanide, and Actinide Metals in Nitric Acid Systems",

abstract = "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. The presence of U(VI), as UO2 2+, 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.",

keywords = "actinides, bismuthate, complexation, solubility, stability",

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Y1 - 2020/2/24

N2 - 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. The presence of U(VI), as UO2 2+, 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.

AB - 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. The presence of U(VI), as UO2 2+, 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.

KW - actinides

KW - bismuthate

KW - complexation

KW - solubility

KW - stability

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

Abstract

Funding

Keywords

UN SDGs

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