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<p>This study investigates natural radionuclide contamination in soils and edible plants from the high-background radiation area of Muong Hum, Northern Vietnam. <sup>226</sup>Ra, <sup>228</sup>Ra, and <sup>40</sup>K activity concentrations in both soils and plants were significantly elevated, with strong species-dependent differences reflecting distinct physiological uptake mechanisms and the predominance of thorium-series isotopes. Total annual effective doses reached 0.46–3.15 mSv y<sup>−1</sup> and 35.29% of sites exceeded the 1 mSv y<sup>−1</sup>. These results indicate that elevated environmental baselines, rather than transfer factors alone, drive total exposure. Further monitoring, species-specific risk assessments, and targeted management strategies are recommended to safeguard food safety and public health.</p>

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Feature, transfer and radiological risk assessment of natural radionuclides from soil to plants at high background radiation area: a case study ambient of the rare earth mine, Muong Hum, Northern Vietnam

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Van-Loat Bui,
  • Van-Hao Duong,
  • Thi Hong Bui,
  • Duc-Thang Duong,
  • Vu Ngoc Ba,
  • Anh-Hung Vu,
  • Viet-Hoang Tran,
  • Thi Mai Pham,
  • Somsavath Leuangtakoun,
  • Hue Nguyen Thanh Kim

摘要

This study investigates natural radionuclide contamination in soils and edible plants from the high-background radiation area of Muong Hum, Northern Vietnam. 226Ra, 228Ra, and 40K activity concentrations in both soils and plants were significantly elevated, with strong species-dependent differences reflecting distinct physiological uptake mechanisms and the predominance of thorium-series isotopes. Total annual effective doses reached 0.46–3.15 mSv y−1 and 35.29% of sites exceeded the 1 mSv y−1. These results indicate that elevated environmental baselines, rather than transfer factors alone, drive total exposure. Further monitoring, species-specific risk assessments, and targeted management strategies are recommended to safeguard food safety and public health.