Committed Effective Dose by Ingestion Food Grown in PEPB

Nadia Rodrigues dos Santos; Alessandro  Mariano Domingues; Izabella Soares de Souza; Carlos Omar Pastrana Orejuela; Rosa Jimenez Bermudez; Ademir Xavier da Silva; Edmilson Monteiro de Souza; Inayá Corrêa Barbosa Lima

doi:10.15392/2319-0612.2026.2757

Autores/as

Nadia Rodrigues dos Santos Universidade Federal do Rio de Janeiro
Alessandro Mariano Domingues Universidade Federal do Rio de Janeiro
Izabella Soares de Souza Universidade Federal do Rio de Janeiro
Carlos Omar Pastrana Orejuela Universidade Federal do Rio de Janeiro
Rosa Jimenez Bermudez Universidade Federal do Rio de Janeiro
Ademir Xavier da Silva Universidade Federal do Rio de Janeiro
Edmilson Monteiro de Souza Universidade do Estado do Rio de Janeiro
Inayá Corrêa Barbosa Lima Universidade Federal do Rio de Janeiro

DOI:

https://doi.org/10.15392/2319-0612.2026.2757

Palabras clave:

gamma spectrometry, committed effective dose, organic crop, Pedra Branca State Park

Resumen

Radionuclides can be incorporated through ingestion and within the human body, they become a source of internal exposure. Therefore, identifying and quantifying the radionuclides present in food is an important step in environmental monitoring and radiological protection. From this perspective, the activity concentrations of ⁴⁰K, ²²⁶Ra, ²²⁸Ra and ²²⁸Th were calculated for six organic crop samples: avocado, cabbage, carrot, persimmon, pineapple and onion, from the PEPB (stands for Pedra Branca State Park), Conservation Unit. Radionuclide analysis was conducted using gamma spectrometry with the use of a High Purity Germanium (HPGe) detector in conjunction with the Genie 2000 software package. The activity concentrations of the radionuclides were calculated based on simulated detection efficiencies. The highest activity concentration of ⁴⁰K was obtained for the carrot (101.83 ± 15.47) Bq.kg^-1, and the highest effective dose value, 1.64 µSv.year^-1, was obtained for avocado. The concentration of ²²⁶Ra activity was below the minimum detectable activity in all samples. Concentrations of ²²⁸Ra were only detected in cabbage and carrots. Activity concentrations of ²²⁸Th were detected in all samples, although at low levels. Estimated ingestion doses are within the limits established by the ICRP 119. Thus, the consumption of these organic foods grown in the PEPB is radiologically safe.

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