The natural radionuclides content and radiological assessment of sediments of the Ogunpa waste-water channel were evaluated to ascertain the radiological safety of the sediments as a building material. The mean activity concentrations of 40K, 226Ra and 232Th in Bq kg−1 were found to be 171 ± 69, 11 ± 5 and 10 ± 4, respectively. The overall mean radium equivalent 29 ± 13 Bq kg−1 was <370 Bq kg−1 that can give the maximum recommended dose of 1 mSv to the general public. The activity concentrations of the radionuclides were all less than world average for soils and sediments. Thus, the use of the sediments from the Ogunpa water channel as building material is safe and would not pose any significant radiological health hazards.

中文翻译：

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确定与源自尼日利亚伊巴丹 OGUNPA 河道的沉积物有关的自然放射性和放射性危害

对奥贡帕废水通道沉积物的天然放射性核素含量和放射性评估进行了评估，以确定沉积物作为建筑材料的放射性安全性。Bq kg-1 中 40K、226Ra 和 232Th 的平均活度浓度分别为 171 ± 69、11 ± 5 和 10 ± 4。总体平均镭当量 29 ± 13 Bq kg-1 小于 370 Bq kg-1，可以向公众提供 1 mSv 的最大推荐剂量。放射性核素的活度浓度均低于土壤和沉积物的世界平均水平。因此，使用奥贡帕河道的沉积物作为建筑材料是安全的，不会造成任何重大的放射性健康危害。