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
1394
7
1
gregorian
2015
10
1
13
4
online
1
fulltext
en
Assessment of geogenic natural radionuclide contents of soil samples collected from Ogun State, South western, Nigeria
Radiation Biology
Radiation Biology
تحقيق بديع
Original Research
<p dir="ltr" style="text-align: justify;"><strong>Background:</strong> Natural radionuclides are always present in the environment. Human exposure to the background radiation is inevitable. It is therefore important to assess health risk associated with these radionuclides.<strong> Materials and Methods:</strong> The distribution of natural radionuclides <sup>238</sup>U, <sup>232</sup>Th and <sup>40</sup>K in soil samples collected from all the twenty (20) local Governments headquarter areas in Ogun state, Nigeria were determined by gamma spectroscopy using a high-purity germanium detector. The measured concentrations were used in estimating the radiological risk pose to people living in these communities. <strong>Results: </strong>The activity concentrations measured ranged between 3 ± 1 Bqkg<sup>-1</sup>(Otta) to 27 ± 6 Bqkg<sup>-1</sup>(odeda) for <sup>238</sup>U, 10 ± 1 Bqkg<sup>-1</sup>(Otta) to 126 ± 6 Bqkg<sup>-1</sup>(Ijebu Igbo) for <sup>232</sup>Th and 7 ± 6 Bqkg<sup>-1</sup>(Aiyetoro) to 497 ± 1 Bqkg<sup>-1</sup>(Odeda) for <sup>40</sup>K. The mean radium equivalent calculated was 77.6 Bqkg<sup>-1</sup> which is lower than 370 Bqkg<sup>-1</sup> of the world average and the hazard indices calculated were lower than unity. <strong>Conclusion:</strong> The absorbed rate and annual effective dose estimated for most of the locations are in good agreement with world average values except for Akomoje, Ake-Abeokuta, Ogere, Ijebu-Igbo and Odeda. </p>
<p></p>
Natural radioactivity, absorbed dose rate, radium equivalent, hazard indices, Ogun State
355
361
http://ijrr.com/browse.php?a_code=A-10-1-583&slc_lang=en&sid=1
Mojisola
Usikalu
moji.usikalu@covenantuniversity.edu.ng
790031947532846007646
790031947532846007646
Yes
Department of Physics, Covenant University
P.P.
Maleka
790031947532846007647
790031947532846007647
No
Environmental Radioactivity Laboratory
M.
Malik
790031947532846007648
790031947532846007648
No
Material Science Department
K.D.
Oyeyemi
790031947532846007649
790031947532846007649
No
Department of Physics, Covenant University
O.O.
Adewoyin
790031947532846007650
790031947532846007650
No
Department of Physics, Covenant University