RADIOLOGICAL HEALTH IMPACT DUE TO ACTIVITY CONCENTRATIONS OF NATURAL RADIONUCLIDES IN THE SOILS FROM TWO MAJOR AREAS IN IJEBUNORTH LOCAL GOVERNMENT, OGUN STATE, NIGERIA
Abstract
The soil samples from two major areas in Ijebu-North Local Government of Ogun State was analyzed for the concentrations of 40K, 226Ra and 232Th using gamma ray spectrometry method. The measured activity concentrations of 40K varied from 245.2 Bqkg-1 to 538.1 Bqkg-1 with a mean value of 367.9±74.1Bqkg-1 , 226Ra in the ranged from 10.4 Bqkg-1 to 30.2 Bqkg-1 with a mean value of 16.4±4.6Bqkg-1 and 232Th ranged from below detection limit (BDL) to 14.1Bqkg-1 with a mean value of 3.3±2.0Bqkg-1 . The mean external gamma absorbed dose rate in air at 1m above the ground level was 26.4±5.1 nGyh-1 which was just about one-half of 56.0 nGyh-1 recommended by UNSCEAR (2000). The mean annual outdoor effective dose rate was 32.3±6.3µSvy-1 . The collective dose equivalent was 9.18 manSv while the collective health detriment of the population was 0.15y-1 .References
N.G.S. Prasad, N. Nagaiah, G.V. Ashok and
N. Karunakara, Health Phys. 94, No. 3
(2008) 264.
N.N. Jibiri, S.K. Alausa and I.P. Farai, Radiol.
Int. J. Low Radiation 16, No. 2 (2009) 79.
IAEA International Basic Safety Standards
for Protection Against Ionizing Radiation and
for Safety of Radiation Sources. IAEA Safety,
Vienna, Series 115 (1996).
National Council on Radiation Protection and
Measurements of Ionising Radiation
Exposure of the Population of the United
States. Washington, DC: NCRP, Report No
(1987).
United Nation Scientific Committee on
Effects of Atomic Radiation (UNSCEAR)
Sources and Effects of Ionizing Radiation,
Report to General Assembly, New York:
United Nations 1 (2000).
F.W. Whicker, Radiation Research 94 (1983)
H.R. Wollenberg and R.A. Smith, Health
Phys. 58 (1990) 183.
T. Badejoko, Nigeria Journal of Mining and
Geology 10 (1975) 42.
I.A. Tubosun, J.R. Lancelot, M.A. Rahaman
and O.U. Ocan, Contr. Miner. Petrol. 88
(1984) 188.
T.O. Oshin and M.A. Rahaman, Journal of
Afr. Earth Sci. 55 (1986) 167.
R. Lopez, M. Garcia-Talavera, R. Pardo,
L. Deban and J.C. Nalda, Radiat. Protect.
Dosim. 111 (2004) 83.
Y. Yang, X. Wu, Z. Jiang, W. Wang, J. Lu, J.
Lin, L.M. Wang and Y. Hsia, China Appl.
Radiat. and Isotopes 63 (2005) 225.
M.A. Rahaman, Publication of the Geology
Survey of Nigeria 3 (1988) 11.
O.O. Kehinde-Phillips, Ogun State in Map, K.
Oyesiku and F.J. Jegede (Eds.) Rex Charles
Publications, Ibadan Nigeria (1992) ISBN
-2137-36-7.
Federal Republic of Nigeria Official Gazette
on Legal Notice on Publication of the Details
of the Breakdown of the National and State
Provisional Total Census, FGP
/52007/2,500 (OL 24) (2006).
B.S. Badmus and O.B. Olatinsu, Afr. J. of
Environ. Sci. and Tech. 4, No. 6 (2010) 328.
I.P. Farai and U.E. Vincent, Nigeria J. of
Phys. 18 (2006) 121.
N.N. Jibiri, I.P. Farai and S.K. Alausa, J.
Environ. Radioact. 94 (2007) 31.
J.A. Ademola, Health Phys. 94 (2008) 43.
M.A. Imtiaz, A. Begum, A.S. Mollah and M.A.
Zaman, Health Phys. 88, No. 2 (2005) 169.
N.A. Mlwilo, N.K. Mohammed and N.M.
Spyrou, J. of Radiological Protection 27
(2007) 471.
I.P. Farai and N.N. Jibiri, Radiat. Prot. Dosim.
(2000) 247.
N. Karunakara, H.M. Somashekarappa, D.N.
Avadhani, H.M. Mahesh, Y. Marayana and K.
Siddappa, Health Phys. 80 (2001) 470.
D.N. Avadhani, H.M. Mahesh, H.M.
Somashekarappa, N. Karunakara, Y.
Narayana and K. Siddappa, J. Radiat.
Protect. Environ. 24 (2001) S136.
Recommendations of the International
Commission on Radiological Protection
(ICRP), New York 1990: Elsevier; ICRP
Publication 60, Ann. ICRP 21 (1991) 1-3.
I.R. McAulay and D. Moran, Radiat. Protect.
Dosim. 24 (1988) 47.
A. Baeza, M. del Rio, C. Miro and J.
Paniagua, J. Environ. Radioact. 23 (1994)
G. Shanthi, C.G. Maniyan, G.R.G. Allan and
T.T. Kumaran, J. Current Science 97, No. 9
(2009a) 1331.
G. Shanthi, T.T. Kumaran J., A.G. Raj and
C. Maniyan, http//:rpd.oxfordjournals.org
(2009b).
