Analytical methodologies for the determination of polonium and uranium in Uruguayan agricultural systems

Authors

  • Cristina Bañobre Departamento de Desarrollo Tecnológico, Centro Universitario Regional del Este, Universidad de la República, Rocha, Uruguay https://orcid.org/0009-0004-5910-7184
  • Ana Lía Noguera Departamento de Desarrollo Tecnológico, Centro Universitario Regional del Este, Universidad de la República, Rocha, Uruguay https://orcid.org/0000-0003-1193-9825
  • Rodolfo Reboulaz Departamento de Desarrollo Tecnológico, Centro Universitario Regional del Este, Universidad de la República, Rocha, Uruguay https://orcid.org/0000-0001-7283-757X
  • Heinkel Bentos-Pereira Departamento de Desarrollo Tecnológico, Centro Universitario Regional del Este, Universidad de la República, Rocha, Uruguay https://orcid.org/0000-0002-1912-9520
  • Laura Fornaro Departamento de Desarrollo Tecnológico, Centro Universitario Regional del Este, Universidad de la República, Rocha, Uruguay https://orcid.org/0000-0002-8914-9367

DOI:

https://doi.org/10.26461/25.06

Keywords:

Phosphate fertilizers, Natural Radionuclides Transfer, Alpha Spectrometry

Abstract

Phosphate rock, raw material used to produce fertilizers, due to its composition can be a source of metals, radionuclides and other traces. The application of phosphate fertilizers can redistribute and increase the concentrations of both metals and radionuclides in soil
and water profiles, influencing their availability and subsequent transfer to the food chain. Knowing the proportion of this transfer is essential due to the implications it can have on human and animal health. This work studies the sample treatment, radiochemical
separation and deposition/electrodeposition conditions for the quantification of polonium-210, uranium-238 and uranium-234 by alpha spectrometry for a Uruguayan agricultural system. Both processes require optimization for each type of matrix, to avoid the self-absorption effect as well as possible interference from other radionuclides present in the sample. The method was verified by quantifying polonium-210, uranium-238 and uranium-234 in International Atomic Energy Agency (IAEA) reference materials: IAEA-447 soil, IAEA-434 phosphogypsum, IAEA-330 spinach. These radionuclides were quantified in environmental matrices and the results were compared with those obtained by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), showing comparable results and indicating that the developed radiochemical separation is suitable for the determination of uranium and polonium radionuclides by alpha spectrometry in the studied matrices. 

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Published

2023-06-12

How to Cite

Bañobre, C., Noguera, A. L., Reboulaz, R. ., Bentos-Pereira, H., & Fornaro, L. (2023). Analytical methodologies for the determination of polonium and uranium in Uruguayan agricultural systems. INNOTEC, (25 ene-jun), e634. https://doi.org/10.26461/25.06

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