|
|
 |
| |
|
|
|
Gamma Spectrometric Analysis of Soil, Sediment and Water Samples of Granitic-Type Solid Mineral Mining Activities |
|
|
|
PP: 29-36 |
|
|
|
doi:10.18576/jrna/020105
|
|
|
|
Author(s) |
|
|
|
Ajekiigbe K. M,
Olise F. S.,
Gbenu Sejlo T.,
Yinusa S. T.,
Amadi V. N.,
Olaniyi H. B.,
|
|
|
|
Abstract |
|
|
| The activity concentrations of 238U, 232Th and 40K in soil, sediment and water from tantalite mine in Iluku-Ofiki, Oke-Ogun, Oyo State, Southwestern Nigeria were determined using Thallium doped Sodium Iodide (NaI (Tl)) detectorbased gamma spectrometry. This was with a view to determine the health implication of the miners and the populace. The average activity concentrations of 238U, 232Th and 40K were found to be 8.42 ± 2.50, 10.28 ± 3.24 and 337.08 ± 63.65Bq kg1 in soil; 6.37 ± 2.00, 14.49 ± 5.57 and 320.40 ± 41.10 Bq kg-1 in sediment; and 4.26 ± 1.52, 9.13 ± 3.80 and 83.79 ± 21.39 Bq L-1 in water, respectively. The average activity concentrations of 238U, 232Th and 40K in the soil and sediment samples were lower than the UNSCEAR activity limits of 32, 45 and 420 Bq kg-1 respectively. The estimated average annual effective dose due to these radionuclides in soil was 44.65 ± 11.34 µSv y-1 and in sediment 46.3 ± 11.07 µSv y-1. These respective average annual effective doses from the said radionuclides in soil and sediment were each lower than the UNSCEAR dose limit of 70 µSv y-1. The radiological variables were treated with statistical analysis so as to determine the similarities and correlations among various samples. Two component representations of the data acquired were generated by the principal component analysis in which 94.60 % of the total variance was explained |
|
|
|
|
|
|
|
