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<p>Natural radioactivity in 20 brands of sachet water produced in Ibadan, Oyo State, Nigeria, was analyzed using well-shielded, calibrated NaI(Tl) gamma spectroscopy. The measured activity concentration varies from 0.41 ± 0.05 Bql-1 to 8.78 ± 0.97 Bql-1 for <sup>232</sup>Th and 4.29 ± 0.4 Bql-1 to 37.48 ± 2.51 Bql-1 for <sup>40</sup>&#xa0;K, and below detection level for <sup>226</sup>Ra. The mean annual effective dose calculated for the age groups 0–1&#xa0;year, 1–2&#xa0;years, 2–7&#xa0;years, 7–12&#xa0;years, 12–17&#xa0;years, and &gt; 17&#xa0;years is 4.63, 0.54, 0.49, 0.51, 0.55, and 0.68&#xa0;mSv respectively. The total annual effective dose from consumption of some of the sachet water exceeded the world average values of 0.12&#xa0;mSv reported by UNSCEAR. The values also exceed the WHO- and ICRP-recommended values of 0.1&#xa0;mSv and 1.0&#xa0;mSv respectively. This showed that there might be radiological risks arising from the consumption of the analyzed sachet water.</p>

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Natural radioactivity in sachet drinking water produced in Ibadan, Oyo State, Nigeria

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • D. O. Olaniyi,
  • C. Nwankwo,
  • O. O. Akerele,
  • S. M. Oyeyemi,
  • L. R. Owoade

摘要

Natural radioactivity in 20 brands of sachet water produced in Ibadan, Oyo State, Nigeria, was analyzed using well-shielded, calibrated NaI(Tl) gamma spectroscopy. The measured activity concentration varies from 0.41 ± 0.05 Bql-1 to 8.78 ± 0.97 Bql-1 for 232Th and 4.29 ± 0.4 Bql-1 to 37.48 ± 2.51 Bql-1 for 40 K, and below detection level for 226Ra. The mean annual effective dose calculated for the age groups 0–1 year, 1–2 years, 2–7 years, 7–12 years, 12–17 years, and > 17 years is 4.63, 0.54, 0.49, 0.51, 0.55, and 0.68 mSv respectively. The total annual effective dose from consumption of some of the sachet water exceeded the world average values of 0.12 mSv reported by UNSCEAR. The values also exceed the WHO- and ICRP-recommended values of 0.1 mSv and 1.0 mSv respectively. This showed that there might be radiological risks arising from the consumption of the analyzed sachet water.