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IJSTR >> Volume 3- Issue 4, April 2014 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Assessment Of Environmental Radioactivity In Selected Dumpsites In Port Harcourt, Rivers State, Nigeria

[Full Text]



Avwiri, G.O., Olatubosun, S.A.



Keywords: Absorbed Dose, Effective Dose, Gamma Spectrometry, Radioactivity, Specific Activity.



Abstract: Radionuclide concentration of soil samples from selected dumpsites within Port Harcourt, Rivers State, Nigeria was determined. In-situ measurements were carried out using Radalert Nuclear Radiation Monitor and a Geographical Positioning System (GPS). Two soil samples each from ten selected dumpsites were collected. Gamma Ray Spectrometry analysis was carried out on the samples to determine specific activity using NaI(Tl) scintillation detector. The measured in-situ equivalent dose rate ranged from 0.891 mSv/yr to 1.592 mSv/yr with an average of 1.261±0.693 mSv/yr for all the locations with seven locations having values below the internationally permissible threshold. The activity concentration of the soil samples obtained through gamma spectrometry analysis ranged from 32.21 Bq/Kg to 100.10 Bq/kg for 232Th, 29.16 Bq/Kg to 61.18 Bq/Kg for 238U and 222.15 Bq/Kg to 1166.99 Bq/Kg for 40K with an average of 62.61±18.97 Bq/Kg, 41.96±5.53 Bq/Kg and 643.10±5.94 Bq/Kg for 232Th, 238U and 40K respectively. Air absorbed dose rate calculated ranged from 57.05 nGy/hr to 123.10 nGy/hr with an average value of 86.71±12.86 nGy/hr for the locations which is higher than the world-average value of 55 nGy/hr for soil. The equivalent radiation exposure obtained using the radionuclide concentration for the locations is between 0.50 mSv/yr and 1.08 mSv/yr with an average of 0.76±0.11 mSv/yr which is below the permissible threshold of 1.0 mSv/yr for soil. Generally, the radiation burden and associated risk posed by the municipal wastes on the studied environment and scavengers is minimal.



[1]. Avwiri, G.O., Nte, F.U. and Olanrewaju, A.I.: “Determination of Radionuclide Concentration of Landfill at Eliozu, Port Harcourt, Rivers State.” Scientia Africana, Vol. 10 (No.1), 46-57, 2011.

[2]. Beck, H.L., De Campo, J.A. and Gogolak, C.V. : “In situ Ge(Li) and NaI(Tl) Gamma –Ray Spectrometry,” Report HASL-258 (U. S. Atomic Energy Commission, New York.), 1972.

[3]. Canadian Centre for Occupational Health and Safety (CCOHS), 2013. http://ccohs.org/products/webinars/radiation/&print=true. Visited March 1, 2014.

[4]. Cember, H. and Johnson, T.E. (2009): “Introduction to Health Physics, Fourth Editon” : The Mc Graw Hill Companies Inc., New York. Pp 109-116, 307 – 320

[5]. Eisenbud, M. and Gesell, T.: “Environmental radioactivity from natural, industrial and military sources. Fourth Edition. Academic Press, New York, 1997.

[6]. Farai, I.P., Okwunakwe, C.E. and Makinde, O.S.: “Gamma Spectroscopy assay of soil samples from waste dumpsites in Port Harcourt, Nigeria. Proceedings of 16th International Conference on Radionuclide Meteorology in Cape Town,” 2007.

[7]. International Atomic Energy Agency: “Measurement of radionuclides in food and the environment - a guide book”. Technical Report Series, No. 295, IAEA, Vienna, 1989.

[8]. International Commission on Radiological Protection Committee II (1960). Report of committee II on permissible dose for internal radiation (1959). Health Physics, 3: 217-226

[9]. Iwegbue, C.M.A., Enuh, F.N, Isirimah, O.N. and Egun, A.C.: “Fractionation, characterization and speciation of heavy metals in composts and compost amended soils.” Afr. J. Biotechnol. 6(2): 067-078, 2007.

[10]. Jibiri N.N., Farai, I.P. and Alausa, S.K.: “Activity Concentration of Ra-226, Ra-228 and K-40 in food Crops from a high background radiation area in Bisichi Jos, Plateau State.” Nigeria Radiation Environmental Biophy, 46: 53-59, 2007.

[11]. Murugesan, S., Mullainathan S., Ramasamy, V. and Meenakshisundaram, V.: “Radioactivity and radiation hazard assessment of Cauvery River, Tamilnadu, India.” Iranian ournal of Radiaion Research,; 8(4): 211-222, 2011.

[12]. Oladapo, O.O., Oni, E.A., Olawoyin, A.A., Akerele O.O. and Tijani, S.A. : “Assessment of Natural Radionuclides Level in Wasteland Soils around Olusosun Dumpsite, Lagos, Nigeria.” IOSR Journal of Applied Physics (IOSR-JAP), Vol 2, Issue 3, 38-43, 2012.

[13]. Olomo, J.B., Akinloye, M.K. and Balogun, F.A. (1994): Distribution of gamma-emitting natural radionuclide in soils and water around nuclear research establishments, Ile-Ife, Nigeria. Nucl. Instr. Meth. Phys. Res. Sect. A Accelerators, Spectrometers, Detectors Associated Equipment, 353:553-557.

[14]. (Radiophobia, 2011) http://nuclearradiophobia.blogspot.com/p/radiation-is-everywhere-and-always-has.html

[15]. Rushbrook, P. : “Guidance on Minimum Approaches for Improvements to Existing Municipal Waste Dumpsites,” WHO Regional Office for Europe, Copenhagen, Denmark, 2001.

[16]. Shapiro J.,: “Radiation Protection, a Guide for Scientists and Physicians”, 2nd ed. Harvard University Press, 1981.

[17]. Song, Q.J. and Greenway, G.M.: “Kinetic speciation of BCR reference materials.” International Journal of Environmental and Analytical Chemistry, 8615, 359-366, 2006.

[18]. Tchokossa, P., Olomo, J.B. and Balogun, F.A. (2011): Assessment of radionulcide concentrations and absorbed dose from consumption of community water supplies in oil and gas producing areas in Delta State, Nigeria. World Journal of Nuclear Science Technology, 1: 77-86

[19]. Tubosun, I.A., Tchokossa P., Okunlola, G.A., Balogun, F.A., Fasasi, M.K. and Ekhaeyemhe, S.: “Natural Radioactivity Associated with Mining of Rare Metal Pegmatite of Oke-Ogun Field, Sepeteri, Southwestern, Nigeria.” International Journal of Science and Technology, Vol.3 (10) 350 -356, 2013.

[20]. United Nations Scientific Committee on the Effects and Risks of Ionizing Radiation, Source, Effects and Risks of Ionizing Radiation. Report to the General Assembly, United Nations, New York, 1998.

[21]. United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR): “Sources and effects of ionizing radiation (Report to the General Assembly)”, New York: United, 2000.

[22]. United States Environmental Protection Agency (USEPA) (2004): http://www.epa.gov/radiation/docs/402-f-01-021.pdf; visited March 1, 2014.

[23]. Whicker, F. W. and Schultz, V. , Radioecology: nuclear energy and the environment. CRC Press, Inc. Boca Raton, Fla., 1(1): 212, 1982.

[24]. World Nuclear Association, 2014. http://www.world-nuclear.org/info/Safety-and-Security/Radiation-and-Health/Naturally-Occurring-Radioactive-Materials-NORM/, visited March 1, 2014.