COMPARISON OF ACTIVITY CONCENTRATIONS OF NATURAL RADIONUCLIDES IN SOILS COLLECTED AT DIFFERENT DEPTHS OF SELECTED HAND-DUG WELLS IN ABEOKUTA
DOI:
https://doi.org/10.51406/jnset.v15i2.1703Keywords:
Activity Concentrations, Depth, High Purity Germanium (HPGe) detector, AbeokutaAbstract
This study was aimed at measuring and comparing the activity concentration of soil samples collected from some selected hand – dug wells with their corresponding depths of collection in Abeokuta metropolis. Total of twenty (20) soil samples were collected from hand-dug wells in five sites (Obada, Adigbe, Kuto, Olorunsogo, and Obantoko) within Abeokuta with four (4) soil samples from each hand-dug well at the surface, (0.0m) through to 2.25m depth. Gamma ray spectroscopy with High Purity Germanium (HPGe) detector was used for the measurements. The average activity concentrations obtained for the three natural radionuclides 226Ra, 232Th and 40K in Bq/Kg are 34.31 ± 2.01, 128.73 ± 4.41 and 152.31 ± 2.59 respectively at depth 0.00 m (surface), 23.00 ± 1.61, 68.39 ± 3.24 and 191.08 ± 3.11 respectively at depth 0.75 m, 31.52 ± 2.21, 145.37± 4.95 and 375.56 ± 5.50 respectively at 1.50 m and lastly 28.57±1.70, 95.61 ± 3.71 and 181.10 ± 3.94 respectively at 2.25 m depth. The world average activity concentrations for 226Ra, 232Th and 40K are given to be 35 Bqkg-1, 30 Bqkg-1 and 400 Bqkg-1 respectively (UNSCEAR 2000). 232Th showed higher average values than the world’s average while averages of 226Ra and 40K were lower but most of the activity concentration values obtained in some of the locations are higher than the world’s average values, especially 226Raand 232Th in the soil samples.
References
Ashton K., Heckler A. and Jones C. 2012. Water For Life – Investigating water as a global issue. Publication of Geography Teachers’ Association of Victoria Inc. (Global Education Project Victoria), Australia. http://www.globaleducation.edu.au/verve/resources/Water_for_Life_web.pdf
Britannica Inc., 2012. Abeokuta Encyclopædia. Encyclopædia Britannica Online. Web.
Dimeji K . A. 2010. Water scarcity bites harder in Abeokuta. Retrieved 2010-05-22.
Farai, I.P., Jibiri, N.N 2000. Baseline studies of terrestrial outdoor gamma dose rate levels in Nigeria. Radiat. Prot. Dosim. 83(3) 247-254.
Farai I.P., Vincent U.E 2006. Outdoor radiation level measurement in Abeokuta, Nigeria, by Thermoluminescence dosimetry. Nigerian Journal of Physics 18(1), 121-126.
Fasasi, M.K. Tchokossa, P. Ojo, J.O. Balogun, F.A. 1999. Occurrence of natural radionuclides fallout Cesium-137 in dry-season agricultural land of south western Nigeria, Journal of Radioanalytical and Nuclear Chemistry 240 (3), 949-952.
Gbadebo, A.M. 2011. Natural radionuclides distribution in the granitic rocks and soils of
Abandoned quarry sites Abeokuta, South-western Nigeria. Asian Journal of Applied Sciences, 4:176-185
Hussein, E.M. 1994. Radioactivity, Health Physics 67, pp 280.
Hassan NM, Ishikawa T, Hosoda M, Sorimachi A, Tokonami S, Fukushi M, Sahoo SK. 2010. Assessment of the natural radioactivity using two techniques for the measurement of radionuclide concentration in building materials used in Japan. J Radioanal Nucl Chem 283(1):15–21. doi:10.1007/s10967-009- 0050-6
ICRP, International Commission on Radiological Protection ICRP publication 65, Annals of the ICRP 23(2). Pergamon Press, Oxford. (1993).
Ibe, K.M., Njoku, J.C. 1999. Migration of contaminants in groundwater at a landfill site, Nigeria, Journal of Environmental Hydrology 7 (8), 1-9.
Jibiri, N.N., Okeyode, I.C. 2012. Evaluation of radiological hazards in the sediments of Ogunriver, South-Western Nigeria. Radiation Physics and Chemistry 81 (2012) 103–112
Jibiri, N.N., Alausa, S.K., Farai, I.P. 2009. Radiological hazard indices due to activity concentrations of natural radionuclides in farm soils from two high back- ground radiation areas in Nigeria. Int. J. Low Radiat. 6 (2), 79–95.
Jones H.A and Hockey R.D 1964. The geology of part of South-western Nigeria Geol. Survey Niger. Bull., 31:1-101.
Kozinsiki D.H. 1995. Natural radioactivity and inorganic chemistry of ground water in the Kirkwood-Cohansey Aquifer system, Southern New Jersey. U.S Geological survey water investigation reports 92-41.
Nwankwo L.I. 2013. Determination of natural radioactivity in ground water in Tanke-Ilorin, Nigeria. West African Journal of Applied Ecology, Vol. 21(1), 2013.
Saidu, A., Ike, E.E 2013. Survey of Gross Alpha Radioactivity in Bore Hole and Well Water in Sokoto City North-Western Nigeria. Nigerian Journal of Basic and Applied Science , 20(3): 20-26.
Tajudeen H.V. 2006. Survey of radioactivity in wells and bore holes from Gwammaja area of Kano city. Unpublished M.Sc. Thesis, A.B.U. Zaria.
United nations scientific committee on the effects of atomic radiation, sources, effects and risks of ionising radiation, Report to the UN General Assembly, with Annexes, United Nations, 1999.
UNSCEAR 2000. Sources and effects of ionizing radiation. United Nations Scientific Committee on the Effects of Atomic Radiation, United Nations, New York
