奥贡帕河河道沉积物中天然放射性核素的测定及其放射性危害。

DETERMINATION OF NATURAL RADIOACTIVITY AND RADIOLOGICAL HAZARD ASSOCIATED WITH SEDIMENTS SOURCED FROM OGUNPA RIVER CHANNELS, IBADAN, NIGERIA.

机构信息

Department of Physics, University of Ibadan, Ibadan, Oyo State, Nigeria.

Department of Physics, Federal University of Technology Akure, Akure, Ondo State, Nigeria.

出版信息

Radiat Prot Dosimetry. 2021 May 17;193(3-4):259-263. doi: 10.1093/rpd/ncab043.

DOI:10.1093/rpd/ncab043

PMID:33823557

Abstract

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.

摘要

评估了奥贡帕废水渠沉积物中的天然放射性核素含量和放射性，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。整体平均镭当量为 29 ± 13 Bq kg-1，<370 Bq kg-1，这可以给公众带来最大推荐剂量 1 mSv。放射性核素的活度浓度均低于世界土壤和沉积物的平均值。因此，奥贡帕水道的沉积物可用作建筑材料是安全的，不会对放射性健康造成任何重大危害。