ArticlePloS one2026
Occupational and environmental radiation exposures from small-scale tin ore processing: A case study from Bangka Island.
Article in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study assessed the radiation exposure risks from Technologically Enhanced Naturally Occurring Radioactive Materials (TENORM) generated during small-scale tin ore processing on Bangka Island, Indonesia. Twenty individuals, including workers and nearby residents, were evaluated. Workers experienced significant occupational exposure, with mean annual doses of 6.87 mGy/y and some exceeding 26.49 mGy/y. Notably, 71% of residents exceeded the International Commission on Radiological Protection (ICRP) public dose limit of 1 mSv/y at their desk locations, indicating elevated environmental contamination risks. For comparison with the mSv-based dose limits, effective dose was approximated from the measured air kerma using ICRP 116 conversion coefficients (1 mGy ≈ 1 mSv for the relevant gamma energies). A significant correlation (R² = 0.6612) was observed between the distance from the workshops and resident exposure, indicating elevated external doses for workers and nearby residents around small-scale tin workshops. Significant differences in exposure were observed between ore workers and non-ore workers, highlighting both direct occupational exposure and indirect residential exposure (body: p = 0.021, r = 0.52; desk: p = 0.010, r = 0.57). Urinary uranium in the ore worker was 14.3 ng/L, while the two controls showed 7.5-8.8 ng/L. These values are reported descriptively because the sample size was too small for statistical comparison. This study demonstrates significant occupational and environmental radiation exposure risks associated with small-scale tin ore processing. These findings point to the need for strengthened radiation protection measures and improved contamination control around small-scale tin workshops.
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