Natural Radionuclide Concentrations and Radiological Impact Assessment of River Sediments of the Coastal Areas of Nigeria


This work was carried out to measure the radioactivity level in the coastal areas of Nigeria by gamma counting of river sediment samples and assess the radiological impact associated with the use of the river sediments as building material. The method of gamma spectrometry with a 7.6 cm by 7.6 cm NaI(Tl) detector was employed in determining 40K, 238U and 232Th levels in 95 and 38 sediment samples respectively collected from representative sites in the oil producing and non oil producing coastal areas of Nigeria. Results of the samples assayed showed that the radioactivity concentrations of 40K, 226Ra and 228Ra in the sediment samples of oil producing areas range from 95.4 to 160.0; 7.6 to 31.0 and 9.5 to 41.6 Bq kg–1, respectively. The respective means were calculated as 122.39 ± 47.49; 18.93 ± 12.53 and 29.31 ± 18.67 Bq kg–1. In the sediment samples from the non oil producing areas, the respective mean values are 88.48 ± 8.22, 14.87 ± 3.51 and 16.37 ± 3.87 Bq kg–1. Statistical analysis of the results showed that there is no significant difference between the radionuclide concentration of the sediment samples from different rivers in the oil producing and non oil producing coastal areas, except for 40K. The values of the natural radionuclide concentrations however translate to the determina-tion of the radiological impact assessment values. The values of the radiological assessment indices obtained were ob-served to be lower than limits internationally reported and recommended for building materials. It could therefore be reported that the operations of the oil companies in the coastline, involving use of radioactive materials have not contributed adversely to the radioactivity level of the river sediments and that the use of river sediments as building mate-rial in the coastal areas of Nigeria poses no radiological risk.

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O. Oni, I. Farai and A. Awodugba, "Natural Radionuclide Concentrations and Radiological Impact Assessment of River Sediments of the Coastal Areas of Nigeria," Journal of Environmental Protection, Vol. 2 No. 4, 2011, pp. 418-423. doi: 10.4236/jep.2011.24047.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] M. Sharaf, M. Mansy, El Sayed and E. Abbas, “Natural Radioactivity and Radon Exhalation Rate in Building Materials Used in Egypt,” Radiation Measurements, Vol. 31, No. 1-6, 1999, pp. 491-495. doi:10.1016/s1350-4487(99)00206-1
[2] A. K. Sam and N. Abbas, “Assessment of Radioactivity and the Asso-ciated Hazards in Local and Imported Cement Types Used in Sudan,” Radiation Protection Dosimetry, Vol. 93, No. 3, 2001, pp. 275-277.
[3] J. Al-Jundi, W. Salah, M. S. Bawa’aneh and F. Afaneh, “Exposure to Radiation from the Natural Radioactivity in Jordanian Building Materials,” Radiation Protection Dosimetry, Vol. 118, No. 1, 2005, pp. 93-96. doi:10.1093/Rpd/Nci332
[4] L. Xinwei, W. Lingqing and J. Xiaodan, “Radiometric Analysis of Chinese Com-mercial Granites,” Journal of Radioanalytical and Nuc-lear Chemistry, Vol. 267, No. 3, 2006, pp. 669-673. doi:10.1007/S10967-006-0101-1
[5] I. P. Farai and J. A. Ademola, “Radium Equivalent Activity Concentrations in Concrete Building Blocks in Eight Cities in Southwestern Nigeria,” Journal Environmental Radioactivity, Vol. 79, 2005, No. 2, pp. 119-125. doi:10.1016/J.Jenvrad.2004.05.016
[6] I. P. Farai and J. E. Ejeh, “Radioactivity Concentrations in Common Brands of Cement in Nigeria,” Radioprotection, Vol. 41, No. 4, 2006, pp. 455-462. doi:10.1051/Radiopro:2006020
[7] I. P. Farai and M. O. Isinkaye, “Radiological Safety Assessment of Surface Water Dam Sediments Used as Building Materials in Southwestern Nigeria,” Journal of Radiological Protection, Vol. 29, No. 1, 2009, pp. 85-93. doi:10.1088/0952-4746/29/1/006
[8] T. Turtiainen, K.Salahel-Din, S. Klemola And A. P. Sihvonen, “Collec-tive Effective Dose by the Population of Egypt from Building Materials,” Journal of Radiological Protection, Vol. 28, No. 2, 2008, pp. 223-232. doi:10.1088/0952-4746/28/2/006
[9] M. Iqba, M. Tufail and S. M. Mirza, “Measurement of Natural Radioactivity in Marble Found in Pakistan Using a Nai(Tl) Gamma-Ray Spectrometer,” Journal of Environmental Radioactivity, Vol. 51, No. 2, 2000, pp. 255-265. doi:10.1016/S0265-931x(00)00077-1
[10] S. A. Elegba, “Uses of Radioactive Sources in the Petroleum Industry,” Proceedings of Workshop on Radiation Safety in the Ni-geria Petroleum Industry, Lagos, June 23-25, 1993, pp. 20-34.
[11] N. N. Alam, M. I. Chowdhury, M. Kamal, S. Ghose, N. Mahmmod, A. K. M. A. Matin and S. Q. Saikat, “Radioactivity in Sediments of The Karnaphuli River Estuary and Bay of Bengal,” Health Physics, Vol. 73, No. 2, 1997, pp. 385-387.doi:10.1097/00004032-199708000-00013
[12] J. M. Gody, L. A. Schuch, D. J. R. Nordemann, V. R. G. Reis, M. Ramalho, J. C. Recio, R. R. A. Brito and M. A. Olech, “137Cs, 226,228Ra, 210Pb And 40K Concentrations in Antarctic Soil, Sediment and Selected Moss and Lichen Samples,” Journal of Environmental Radioactivity, Vol. 41, No. 1, 1998, pp. 33-45. doi:10.1016/S0265-931X(97)00084-2
[13] G. G. Pyle and F. V. Clulow, “Non-Linear Radionuclide Transfer from the Aquatic Environment to Fish,” Health Physics, Vol. 73, No. 3, 1997, pp. 488-493. doi:10.1097/00004032-199709000-00007
[14] H. Pa-paefthymiou, G. Papatheodorou, A. Moustakli, D. Chris-todoulou and M. Geraga, “Natural Radionuclides And 137Cs Distributions and Their Relationship with Sedi-mentological Processes in Patras Harbour,” Greece Jour-nal of Environmental Radioactivity, Vol. 94, No. 2, 2007, pp. 55-74.
[15] J. Bereka and P. Matthew, “Natural Ra-dioactivity of Australian Building Materials, Industrial Wastes and By-Pro- ducts,” Health Physics. Vol. 48, No. 1, 1985, pp. 87-95. doi:10.1097/00004032-198501000-00007
[16] Z. Ham-zah, S. Ahmad, H. M. Noor and D. E. She, “Surface Rad-iation Dose and Radionuclide Measurement in Ex-Tin Mining Area, Kg Gajah, Perak,” The Malaysian Journal of Analytical Sciences, Vol. 12, No. 2, 2008, pp. 419-431.
[17] United Nations Scientific Committee on Effects of Atomic Radiation (UNSCEAR), “Sources and Effects of Ionizing Radiation, Annex A,” New York, 1993, pp. 33-89.
[18] European Commission (EC), “European Commission Report on Radiological Protection Principles Concerning the Natural Radioactivity of Building Materials Radiation Protection No. 112,” Luxembourg, 1999.
[19] C. Papastefanou, S. Stoulos and M. Mano-lopculou, “The Radioactivity of Building Materials,” Journal of Radioanalytical and Nuclear Chemistry, Vol. 266, No. 3, 2005, pp. 367-372. doi:10.1007/s10967-005-0918-z
[20] S. Turhan and L. Gunduz, “Determination of Specific Activity of 226Ra, 232Th and 40K for Assessment of Radiation Hazards from Turkish Pumice Samples,” Journal of Radiological Pro-tection, Vol. 99, No. 2, 2008, pp. 332-342. doi:10.1016/j.jenvrad.2007.08.022
[21] N. N. Jibiri, “Application of in-situ Gamma Ray Spectrometry in Baseline Studies of Outdoor Radiation Exposure Levels in Nigeria,” Ph.D. Dissertation, University of Ibadan, Ibadan, 2000.
[22] Matiullah, A. Ahad, S. Rehman, S. Rehman and M. Fah- eem, “Measurement of Radioactivity in Soil of Bahawapur Division, Pakistan,” Radiation Protection Dosimetry, Vol. 112, No. 3, 2004, pp. 443-447. doi:10.1093/rpd/nch409
[23] United Nations Scientific Committee on Effects of Atomic Radiation (UNSCEAR), “Sources and Effects of Ionizing Radiation, Annex B,” New York, 2000, pp. 3-17

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