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VOL. 10, ISSUE 4 (2025)
Determination of the radiological risk associated with naturally occurring radioactive materials (NORMS) in quarry products from quarries in Ekiti and Ogun states, Southwestern Nigeria
Authors
Olatunji A, Orodiran OT, Amusat TA, Ayanlola PS, Isola GA
Abstract
The radiological risk of quarry activities on
workers and residency due to the presence of naturally occurring radionuclides
in quarries products samples collected from quarries in Ekiti and Ogun States,
Southwestern Nigeria using gamma ray spectroscopy, NaI (Tl) for its analysis
had been carried out. The calculated activity concentrations ranged as
presented for Ekiti State; 238U [32.10 ± 2.18] to [5.48 ± 0.89]
Bq/kg; 232Th [(15.09 ± 1.32) to (3.92 ± 0.53) Bq/kg and 40K
[(512.38 ± 10.21) Bq/kg to (264.31 ± 3.38) Bq/kg, for Ogun State; 238U
[32.71 ± 2.03] to [6.02 ± 0.92] Bq/kg; 232Th [(15.17 ± 2.01) to
(4.21 ± 0.42) Bq/kg and 40K [(518.23 ± 9.56) Bq/kg to (286.42 ±
4.48) Bq/kg respectively. The absorbed dose rate and annual effective dose
equivalent and the radiological hazard index were estimated using the
calculated activities concentration of the radionuclides. The mean absorbed
dose rate and annual equivalent effective dose are 12.29 ± 2.31 nGy/h and 0.141
mSv/y respectively. The result shown that the activity concentration of 40K
is slightly greater than both 238U and 232Th which
indicate the abundance of potassium in the study areas. It was also observed
that the activity concentrations of all the radionuclides and the determined
radiological hazard index of the product samples were found lower than the
recommended permissible safety limits of 420 Bq/kg, 33 Bq/kg and 45 Bq/kg for 40K,
238U and 232Th respectively.
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Pages:48-52
How to cite this article:
Olatunji A, Orodiran OT, Amusat TA, Ayanlola PS, Isola GA "Determination of the radiological risk associated with naturally occurring radioactive materials (NORMS) in quarry products from quarries in Ekiti and Ogun states, Southwestern Nigeria". International Journal of Advanced Scientific Research, Vol 10, Issue 4, 2025, Pages 48-52
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