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Okeyode, I. C.
- Determination of some Physical Parameters of Olumo Rock, Abeokuta Ogun-state, Nigeria
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PDF Views:107
Authors
Affiliations
1 Department of Physics, College of Natural Sciences, University of Agriculture, Abeokuta, NG
1 Department of Physics, College of Natural Sciences, University of Agriculture, Abeokuta, NG
Source
Indian Journal of Science and Technology, Vol 2, No 7 (2009), Pagination: 6-10Abstract
The physical parameters of Olumo rocks namely, radiogenic heat, age of the rock, density and average absorbed dose rate were determined. The radioactive concentrations were also determined using gamma-ray spectrometry. The three natural radio nuclides examined in the rock samples were namely 40K, 238U and 232Th. The average radioactive concentration in each of the radionuclides were 961.49 BqKg-1, 9.57 BqKg-1 and 112.38 BqKg-1 respectively. The average absorbed dose rate was 0.059 ± 0.0043 µGh-1 similar to the world's average absorbed dose rate of 0.059 ± 0.0l2 µGh-1 as recommended for normal environment by UNSCEAR. The highest radiogenic heat was found in 40K with 93.37% of the total. Furthermore, the approximate age of Olumo rock, as per the activity concentration, was found to be 4.94 x 109 years. The average density was found to be 0,729 kgm-3.Keywords
Olumo Rock Age, Radioactivity, Radionuclides, 40K, 238U And 232ThFull Text
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Abstract Views :311 |
PDF Views:102
Authors
Affiliations
1 Dept. of Physics, College of Natural Sciences, University of Agriculture, Abeokuta, NG
1 Dept. of Physics, College of Natural Sciences, University of Agriculture, Abeokuta, NG
Source
Indian Journal of Science and Technology, Vol 3, No 3 (2010), Pagination: 335-337Abstract
Measurements of the elemental composition of soil samples were carried out using Atomic Absorption Spectrophotometer. The samples were collected from Ogun-Oshun River Basin Development Authority (O-ORBDA) Headquarters, Abeokuta, Nigeria. Samples were collected at a depth of about 10 cm and a total of 24 soil samples were taken from the labelled points, as shown in the map of the project site. The Global Positioning Satellite (GPS) was used to obtain the geographical position of each sample point. Four heavy metals (Th, U, Pb,&Cr), five major elements (K, Ca, N, P&Mg) and five trace elements (Zn, Mn, Cu, Al&Fe) were detected. Phosphorus had the highest average value of (78.71 ppm) while Nitrogen had the least (0.17 ppm). The significance of these results is discussed in the paper.Keywords
Elemental Analysis, Trace Elements, Heavy Metals, Atomic Absorption SpectrophotometerFull Text
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