Cell Biology JoVE (Open Access) Citable · DOI

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

Name: Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films
Uploaded: 2026-06-30
Duration: 12 min 22 s
Description: The biological uptake of plutonium (Pu) in aquatic ecosystems is of particular concern since it is an alpha-particle emitter with long half-life which can ...

DOI: 10.3791/53188-v

What you'll learn

✓ Apply diffusive gradients in thin films (DGT) technique to measure plutonium speciation
✓ Determine Pu(IV) and Pu(V) diffusion coefficients in environmental matrices
✓ Assess plutonium bioavailability in natural freshwater systems using field deployment

Protocol

The technique of diffusive gradients in thin films (DGT) is proposed for speciation studies of plutonium. This protocol describes diffusion experiments probing the behavior of Pu(IV) and Pu(V) in presence of organic matter. DGTs deployed in a karstic spring allow assessment of the bioavailability of Pu.

Difficulty

advanced

Total time

~3–5 days (including field deployment, laboratory diffusion experiments, and radiochemical analysis)

Biosafety

BSL-2

Steps

Prepare plutonium solutions for diffusion experiments

Prepare Pu(IV) and Pu(V) stock solutions with varying concentrations and establish baseline conditions in presence of organic matter for subsequent diffusion assays.

▶ 01:10

Conduct laboratory diffusion experiments with DGT

Set up diffusive gradients in thin films apparatus containing plutonium solutions and measure diffusion kinetics across binding and diffusion layers over controlled time periods.

▶ 02:49

Perform radiochemical separation of plutonium

Extract and isolate plutonium from DGT resins and environmental samples using radiochemical methods to quantify Pu(IV) and Pu(V) species.

▶ 05:25

Deploy DGT devices in natural freshwater environments

Install assembled DGT units in karstic spring or target freshwater system to assess in situ plutonium bioavailability and speciation under natural conditions.

▶ 07:03

Calculate plutonium diffusion coefficients and bioavailability

Analyze accumulated plutonium data from laboratory and field experiments to determine diffusion coefficients and interpret bioavailability trends in natural waters.

▶ 09:27

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