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Updated: Mar 24, 2026

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Published on: November 9, 2015

A Novel Method for Tracer Concentration Plutonium(V) Solution Preparation.

Nathan A Conroy¹, E Miller Wylie¹, Brian A Powell¹

¹Environmental Engineering & Earth Science, Clemson University , Clemson, South Carolina 29625, United States.

Analytical Chemistry

|March 16, 2016

Summary

This summary is machine-generated.

Preparing pure plutonium(V) solutions for environmental research is challenging. Ozone oxidation of plutonium(IV) creates plutonium(VI), which then reduces to stable plutonium(V) for over a month.

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Last Updated: Mar 24, 2026

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Area of Science:

Environmental Chemistry
Radiochemistry
Solution Chemistry

Background:

Plutonium's complex redox chemistry complicates the preparation of pure low-concentration solutions.
Environmental studies require stable, low-concentration plutonium solutions, particularly for tracer studies.

Purpose of the Study:

To develop an efficient method for preparing relatively pure low-concentration plutonium(V) solutions.
To investigate the stability and optimal conditions for plutonium(V) in aqueous solutions.

Main Methods:

Oxidation of plutonium(IV) solutions using ozone gas.
Monitoring plutonium redox state changes over time and across different pH levels.
Assessing plutonium stability and loss from solution.

Main Results:

Ozone oxidation yielded predominantly plutonium(VI) with some plutonium(V).
Plutonium(VI) spontaneously reduced to stable plutonium(V) over several days.
Increasing pH accelerated the plutonium(VI) to plutonium(V) conversion without significant plutonium(IV) formation.
Plutonium(V) remained stable in solution from pH 3-7 for over a month, though losses occurred at neutral pH due to precipitation or sorption.

Conclusions:

Ozone oxidation followed by controlled reduction offers a fast method for preparing plutonium(V) solutions.
This method avoids extensive extraction or cleanup steps, suitable for tracer concentration studies.
Understanding pH-dependent stability is crucial for long-term plutonium(V) solution applications.