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<p>This study evaluated the activity concentrations of <sup>226</sup>Ra in cassava pulp, peel, and derived starch cultivated in three production sectors of Chone, Ecuador, and assessed soil-to-plant transfer and associated dietary exposure. Results show pronounced sector-dependent variability in radionuclide distribution, with consistently lower <sup>226</sup>Ra levels in starch relative to raw plant fractions. Estimated ingestion doses for both children and adults were negligible and well below international reference values. These findings provide the first multi-matrix baseline for <sup>226</sup>Ra transfer in cassava under tropical Ecuadorian conditions and support site-specific radiological risk assessments.</p>

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Soil-to-plant transfer of 226Ra and radiological risk from cassava consumption in a tropical agroecosystem: a multi-matrix assessment from Ecuador

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Kevin José Alcívar-Mejía,
  • Tony Jesús Viloria-Ávila

摘要

This study evaluated the activity concentrations of 226Ra in cassava pulp, peel, and derived starch cultivated in three production sectors of Chone, Ecuador, and assessed soil-to-plant transfer and associated dietary exposure. Results show pronounced sector-dependent variability in radionuclide distribution, with consistently lower 226Ra levels in starch relative to raw plant fractions. Estimated ingestion doses for both children and adults were negligible and well below international reference values. These findings provide the first multi-matrix baseline for 226Ra transfer in cassava under tropical Ecuadorian conditions and support site-specific radiological risk assessments.