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Rapid Sample Preparation for Alpha Spectroscopy with Ultrafiltration Membranes.

Christine E Duval1, Abenazer W Darge1, Cody Ruff1

  • 1Department of Chemical and Biomolecular Engineering , Clemson University , 127 Earle Hall , Clemson , South Carolina 29634 , United States.

Analytical Chemistry
|February 27, 2018
PubMed
Summary

This study introduces a fast, field-ready method for alpha spectroscopy sample preparation using functional ultrafiltration membranes to concentrate uranium from groundwater, speeding up nuclear forensics. This technique offers efficient uranium recovery and purification for environmental analysis.

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Nuclear Forensics

Background:

  • Traditional alpha spectroscopy sample preparation is time-consuming and requires numerous consumables.
  • Accurate uranium detection in environmental samples is crucial for nuclear forensics and environmental monitoring.

Purpose of the Study:

  • To develop a rapid, fieldable sample preparation technique for alpha spectroscopy.
  • To create functional ultrafiltration membranes for selective uranium concentration from groundwater.
  • To reduce the overall nuclear forensics timeline through streamlined sample preparation.

Main Methods:

  • Ultraviolet grafting of uranium-selective polymer chains onto ultrafiltration membranes.
  • Characterization of functionalized membranes using Fourier-transform infrared spectroscopy.
  • Performance evaluation with uranium-233 and depleted uranium in various water matrices at pH 6.

Main Results:

  • Functionalized membranes achieved a peak energy resolution of 31 ± 2 keV and 81 ± 4% uranium recovery from pH 6 simulated groundwater.
  • Baseline energy resolution was obtained for uranium-238 and uranium-234 in spiked groundwater.
  • The membranes processed liters per hour of contaminated groundwater via low-pressure filtration, enabling high-throughput analysis.

Conclusions:

  • The developed functional ultrafiltration membranes provide a one-step process for uranium concentration, purification, and sample mounting.
  • This technique significantly decreases the nuclear forensics timeline and minimizes consumable usage.
  • The method is suitable for rapid, fieldable analysis of uranium in contaminated groundwater.