Hostname: page-component-848d4c4894-x5gtn Total loading time: 0 Render date: 2024-05-21T08:49:20.914Z Has data issue: false hasContentIssue false
  • English
  • Français

Radioactivity concentrations and dose assessment for bitumen and soil samples around a bituminous deposit in Ondo State, Nigeria

Published online by Cambridge University Press:  15 September 2010

J.A. Ademola  and
S. Ademonehin
J.A. Ademola
Affiliation:
Department of Physics, University of Ibadan, Ibadan, Nigeria
S. Ademonehin
Affiliation:
Department of Physics, University of Ibadan, Ibadan, Nigeria
Get access

Abstract

Bitumen samples and soil samples around a bituminous deposit in Ondo State, Nigeria, were analysed for 40K, 226Ra and 232Th employing gamma-ray spectrometry. The activity concentrations of 40K, 226Ra and 232Th in soil varied from (45.2 ± 5.3) to (484.2 ± 25.9), BDL (below detectable limit) to (27.7 ± 2.1) and (22.8 ± 2.7) to (62.4 ± 6.8) Bq.kg-1, respectively. The corresponding mean values were (240.2 ± 133.5), (13.3 ± 8.0) and (40.0 ± 10.2) Bq.kg-1, respectively. The mean activity concentrations of the radionuclides in the bitumen were (58.4 ± 36.4), (16.1 ± 13.3) and (32.5 ± 13.1) Bq.kg-1, respectively, for 40K, 226Ra and 232Th. The mean absorbed dose and effective dose for the soil samples were (41.5 ± 8.9) nGy.h-1 and (50.7 ± 10.9) μSv.y-1, respectively, while those of the bitumen samples were (29.5 ± 15.6) nGy.h-1 and (36.1 ± 19.1) μSv.y-1, respectively. For radiological hazard assessment, the radium equivalent activity and the external hazard index were determined. The values of the radium equivalent activity and external hazard index obtained for the soil and bitumen samples were lower than the recommended limit.

Keywords

Activity concentrationnatural radionuclidesdose assessmentbitumensoilNigeria
Type
Article
Information
Radioprotection , Volume 45 , Issue 3 , July 2010 , pp. 359 - 368
Copyright
© EDP Sciences, 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Références

Adegoke O.S., Ibe E.C. (1982) The tar-sand and heavy crude resources of Nigeria, Proc. 2nd Intern. Conf. on the Heavy Crude and Tar-sands (Caracas, Venezuela).
Adegoke O.S., Omatsola M.E., Coker J.L. (1991) The geology of the Nigerian tar-sands. In: Heavy Crude and Tar-sands Hydrocarbons for the 21st Century, Proc. 5th UNITAR Intern. Conf. on Heavy Crude and Tar-Sands (Salt Lake City, Utah, USA).
Ademola, J.A. (2008a) Exposure to high background radiation level in the tin mining area of Jos Plateau, Nigeria, J. Radiol. Prot. 28, 93-99.CrossRefGoogle ScholarPubMed
Ademola, J.A. (2008b) Assessment of natural radionuclide content of cements used in Nigeria, J. Radiol. Prot. 28, 581-588.CrossRefGoogle ScholarPubMed
Asghar, M., Tufail, M., Sabiha-Javied Abid, A., Waqas, M. (2008) Radiological implications of granite of northern Pakistan, J. Radiol. Prot. 28, 387-399.CrossRefGoogle ScholarPubMed
Beretka, J., Mathew, P.J. (1985) Natural radioactivity of Australian building materials, industrial waste and by-products, Health Phys. 48, 87-95.CrossRefGoogle Scholar
Boyle, R.U. (1982) Geochemical prospecting for thorium and uranium deposit, Developm. Economics Geology 16, 71-78.Google Scholar
CBEIR NRC (1988) Committee on the Biological Effects of Ionizing Radiations, National Research Council. Health Risks of Radon and Other Internally Deposited Alpha-Emitters: BEIR IV. National Academy Press, Washington, D.C.
Enu, I.I. (1994) Textural characteristics of the Nigerian tar sands, Sedimentary Geology 33, 57-61.Google Scholar
Farai, I.P., Ademola, J.A. (2005) Radium equivalent activity concentrations in concrete building blocks in eight cities in Southwestern Nigeria, J. Environ. Radioact. 79, 119-125.CrossRefGoogle ScholarPubMed
IAEA (1989) International Atomic Energy Agency. Measurements of radionuclides in food and the environment – A Guidebook. STI/DOC/10/295 IAEA Vienna.
Kathren R. (1991) Radioactivity in the environment. Taylor and Francis Pub, USA.
Kribek, B., Zak, K., Spangenberg, J.E., Jehlicka, J., Prokes, S., Kominek, J. (1999) Bitumens in the late Variscan hydrothermal vein-type uranium deposit of Pribram, Czech Republic; sources, radiation-induced alteration, and relation to mineralization, Economic Geology 94, 1093-1114.CrossRefGoogle Scholar
Krieger, R. (1981) Radioactivity of construction materials, Betonwerk Fertigteil-Tech 47, 468-473.Google Scholar
Krisiuk E.M., Tarasov S.I., Shamov V.P., Shalak N.I., Lisachenko E.P., Gomelsky L.G. (1971) A Study of Radioactivity in Building Materials. Research Institute for Radiation Hygiene, Leningrad.
OECD (1979) Organization of Economic Cooperation and Development. Exposure to radiation from natural radioactivity in building materials, Report by a Group of Experts of the OECD. Nuclear Energy Agency, Paris.
Omatsola, M.E., Adegoke, O.S. (1981) Tectonic evolution and cretaceous stratigraphy of the Dahomey Basin, Niger. J. Mining Geol. 18, 130-137.Google Scholar
Shanbhag, A.A., Sartandel, S.J., Ramachandran, T.V., Puranik, V.D. (2005) Natural radioactivity concentrations in beach sand of Ratnagiri coast, Maharastra, J. Assoc. Environ. Geochem. 8, 304-308.Google Scholar
UNSCEAR (2000) United Nations Scientific Committee on the Effects of Atomic Radiation. Sources and Effects of Ionizing Radiation, Vol. 1: Sources. 2000 Report to the General Assembly, with scientific annexes. Annex B: Exposures from natural radiation sources (New York, United Nations).