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Determination of natural uranium by various analytical techniques in soils of Zacatecas State (Mexico)

  • Edmundo Escareño-JuárezEmail author
  • Rafael Pardo
  • Catalina Gascó-Leonarte
  • Marisol Vega
  • María Isabel Sánchez-Báscones
  • Ana Isabel Barrado-Olmedo
Article
  • 36 Downloads

Abstract

238U is a radionuclide present in the earth’s crust that provides 65.9% of annual average radiation dose and represents 99.27% of total uranium. 238U has been determined in samples from undisturbed topsoil in the Zacatecas State, Mexico, using several analytical techniques. ICP-MS and α-spectrometry produced the most reliable results. Uranium concentrations found in topsoil samples (0.4–3.7 mg kg−1) were similar to its average crustal abundance (2.8 mg kg−1) and indicate high homogeneity without evidence of enrichment. The average concentration of 2.1 mg kg−1 can be established as uranium background level in the topsoil of Zacatecas (Mexico).

Keywords

238Topsoil Background concentration ICP-MS α-Spectrometry Enrichment factor 

Notes

Acknowledgements

The authors are grateful to Rocio García Rodríguez, the Faculty of Sciences and the Laboratory of Instrumental Techniques (LTI) of the University of Valladolid (Spain), the Environmental Radioactivity and Radiological Surveillance Unit of the Center for Energy, Environment and Technology Research (CIEMAT, Spain), the Carolina Foundation (Spain), the Ministry of Foreign Affairs of Mexico and the Autonomous University of Zacatecas (Mexico), for their collaboration in carrying out this work.

Compliance with ethical statement

Conflict of interest

The authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of Analytical Chemistry, Faculty of SciencesUniversity of ValladolidValladolidSpain
  2. 2.Unit of Environmental Radioactivity and Radiological SurveillanceCenter for Energy, Environment and Technology Research (CIEMAT)MadridSpain

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