Microwave-assisted acid digestion (MAD) for the determination of radionuclides in contaminated soil

In this study, we developed a high efficiency sample pretreatment technique using microwave-assisted acid digestion (MAD) under a mixture of HNO 3 -HCl-HF-H 2 O 2 conditions, capable of leaching various radioactive nuclides from contaminated soil within 2 h. Our validation results using SRM 2709a so...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2024-08, Vol.333 (8), p.4151-4160
Main Authors: Yoo, Jung Bo, Choi, Kwang-Soon, Choi, Jung-Weon, Jung, Kyunghun, Park, Tae-Hong
Format: Article
Language:English
Subjects:
Acid digestion
Acid leaching
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Hadrons
Heavy Ions
Hydrogen peroxide
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Nuclides
Physical Chemistry
Radioisotopes
Soil chemistry
Waste management
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Summary:In this study, we developed a high efficiency sample pretreatment technique using microwave-assisted acid digestion (MAD) under a mixture of HNO 3 -HCl-HF-H 2 O 2 conditions, capable of leaching various radioactive nuclides from contaminated soil within 2 h. Our validation results using SRM 2709a soil standard material confirmed that when the MAD process was performed and then repeated, the chemical recovery rates of all 9 elements were consistently above 90%, demonstrating an outstanding leaching efficiency compared to conventional acid leaching (AL) methods. The activity of radionuclides obtained through AL were found to be underestimated compared to those obtained through MAD. We anticipate that the application of this technique for precise activity of radionuclides will contribute to cost savings in decommissioning waste management.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-024-09564-w