International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1399
7
1
gregorian
2020
10
1
18
4
online
1
fulltext
en
Radiological hazards assessment of laterite mining field in Ilorin, North-central Nigeria
Medical Physics
Medical Physics
تحقيق بديع
Original Research
<div style="text-align: justify;">Background: Assessment of activity concentrations of <sup>238</sup>U, <sup>232</sup>Th, <sup>40</sup>K and gamma dose rate (DR) was carried out over a laterite mining field in Ilorin-south, Nigeria. Materials and Methods: A well calibrated Super-Spec (RS-125) gamma spectrometer was used to measure the activity concentrations of <sup>40</sup>K, <sup>238</sup>U, <sup>232</sup>Th and gamma doses rate at 1 m above the ground level over the laterite mining field. Fifty (50) measurements of the activity concentration of the radionuclides were obtained at about 1 meter above the topsoil. For each point, measurements were taken four (4) times for better accuracy. Results: The overall mean of the activity concentrations of <sup>40</sup>K, <sup>238</sup>U and <sup>232</sup>Th are 81.38, 43.89 and 38.79 Bqkg<sup>-1 </sup>respectively. The mean value for DR was found to be 46.44 nGyhr<sup>-1</sup>. The mean activity concentrations of <sup>238</sup>U and <sup>232</sup>Th are higher than the recommended limits provided by UNSCEAR. This is a cause for worry as significant enhancement in the concentration of <sup>238</sup>U and <sup>232</sup>Th will increase the level of the background radiation and possibly render the soil unfit for use in building and construction. The results of most of the radiological impact parameters (RIP) are above the limits provided by UNSCEAR. Conclusion: From the results, it implies that the risk of indoor gamma radiation exposure is high for this lateritic soil. So the lateritic soil from this mine field may not be too suitable for building and construction purposes.</div>
Radioactivity, background radiation, gamma spectrometry, radiological impact parameters, Ilorin.
895
906
http://ijrr.com/browse.php?a_code=A-10-2055-76&slc_lang=en&sid=1
M.M.
Orosun
muyiwaorosun@yahoo.com
7900319475328460017132
7900319475328460017132
Yes
Department of Physics, University of Ilorin, Ilorin, Kwara state, Nigeria
M.R.
Usikalu
7900319475328460017133
7900319475328460017133
No
Department of Physics, Covenant University, Ota, Ogun State, Nigeria
K.J.
Oyewumi
7900319475328460017134
7900319475328460017134
No
Department of Physics, University of Ilorin, Ilorin, Kwara state, Nigeria