Caroline Nihinlola Iwetan^1*, Ibiyinka Agboola Fuwape¹, Adeseye Muyiwa Arogunjo¹, Ganiyu Obor²

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¹ Physics Department, Federal University of Technology, Akure, Nigeria.
² Biochemistry Department, Federal University of Technology, Akure, Nigeria.
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Abstract: Activity concentrations of twenty-six (26) samples of sediment collected from rivers from eleven (11) oil-producing communities and two (2) non-oil producing communities in Delta state of Nigeria were studied. Hyper Purity Germanium (HPGe) Detector was used for counting and detection of radionuclide content of all samples. Results of the samples analysed showed that the radioactivity concentrations of K⁴⁰, Th²³² and U²³⁸ in the sediment samples from oil-producing areas range from 32.47 Bq·kg^-1 to 525.1 Bq·kg^-1 with an average of 302.15 Bq·kg^-1, 6.31 Bq·kg^-1 to 19.33 Bq·kg^-1 with an average of 11.66 Bq·kg^-1, and 4.45 Bq·kg^-1 to 18.69 Bq·kg^-1 with an average of 8.66 Bq·kg^-1 respectively. Activity concentrations at the control site ranged from 3.15 Bq·kg^-1 to 4.80 Bq·kg^-1, 2.27 Bq·kg^-1 to 4.18 Bq·kg^-1 and 1.15 Bq·kg^-1 to 1.76 Bq·kg^-1 for K⁴⁰, Th²³² and U²³⁸. These values are within the world average; natural radioactivity mapping of the study area is carried out using the Surfer software. Statistical analysis of the results showed that there is a significant difference between the radionuclide concentrations of the sediment samples from rivers in the oil producing site compared to results from non-oil producing communities, except for one of the oil producing site samples (Idumuesah) which has values that are close to those from the control sites for K⁴⁰. The values of the radiological assessment indices obtained were observed to be within the permissible maximum values; hence the radiation hazard at study areas are negligible. However, concentration values of studied radionuclide at the oil-producing study areas were observed to be higher than values from the non-oil producing sites in most cases. It could therefore be reported that the operations of the oil companies in Delta state of Nigeria may have contributed to the high radioactivity level of the river sediments. Although the concentration at the time of this study poses no risk, further industrial activities in the study area may raise the activity concentration and radiological burden in the future.

Keywords: Sediment, Natural Radioactivity, TENORM, HPGe Detector

Cite this paper: Iwetan, C. , Fuwape, I. , Arogunjo, A. and Obor, G. (2015) Assessment of Activity Concentration of Radionuclides in Sediment from Oil Producing Communities of Delta State, Nigeria. Journal of Environmental Protection, 6, 640-650. doi: 10.4236/jep.2015.66058.

References

[1]   Ajayi, O.S. (2002) Evaluation of Absorbed Dose Rate and Annual Effective Dose Equivalent Due to Terrestrial Gamma Radiation in Rocks in a Part of Southwestern Nigeria. Radiation Protection Dosimetry, 98, 441. http://dx.doi.org/10.1093/oxfordjournals.rpd.a006736

[2]   Paschoa, A.S. and Steinhausler, F., Eds. (2010) Technologically Enhanced Natural Radiation. Elsevier Publications, Oxford.

[3]   Gregory, A., Emmanuel, E. and Ezekiel, A. (2013) Gamma Spectroscopy Analysis of Produced Water from Selected Flow Stations in Delta State, Nigeria. International Journal of Environmental Monitoring and Analysis, 1, 167-174. http://dx.doi.org/10.11648/j.ijema.20130105.11

[4]   Friedlander, B., et al. (2005) Radionuclide in the Marine Environment, A CRESP Science Review, Consortium for Risk Evaluation with Stakeholder Participation.

[5]   Beretka, J. and Matthew, P.J. (1985) Natural Radioactivity of Australian Building Materials, Industrial Wastes and By-Products. Health Physics, 48, 87.
http://dx.doi.org/10.1097/00004032-198501000-00007

[6]   Diab, H.M., Nouh, S.A., Hamdy, A. and El-Fiki, S.A. (2008) Evaluation of Natural Radioactivity in a Cultivated Area around a Fertilizer Factory. Journal of Nuclear and Radiation Physics, 3, 53-62.

[7]   Doretti, L., Ferrar, D., Barison, G., Gerbasi, R. and Battiston, G. (1992) Natural Radionuclides in the Mud Sand Waters Used in Thermal Therapy in Abano Terme. Italy. Radiation Protection Dosimetry, 45, 175-178.

[8]   Girigisu, S., Ibeanu, I.G.E., Adeyemo, D.J., Onoja, R.A., Bappah, I.A. and Okoh, S. (2013) Scholars Research Library Journal Archives of Applied Science Research, 5, 204-210.

[9]   Karahan, G. and Bayulken, A. (2000) Assessment of Gamma Dose Rates around Istanbul, Turkey. Journal of Environmental Radioactivity, 47, 213-221.
http://dx.doi.org/10.1016/S0265-931X(99)00034-X

[10]   Krmar, M., Slivka, J., Varga, E., Bikit, I. and Veskovic, M. (2009) Correlations of Natural Radionuclides in Sediment from Danube. Journal of Geochemical Exploration, 100, 20-24.
http://dx.doi.org/10.1016/j.gexplo.2008.03.002

[11]   Kurnaz, A., Küçükömeroglu, B., Keser, R., Okumusoglu, N.T., Korkmaz, F., Karahan, G. and Çevik, U. (2007) Determination of Radioactivity Levels and Hazards of Soil and Sediment Samples in Firtina Valley (Rize, Turkey). Applied Radiation and Isotopes, 65, 1281-1289.
http://dx.doi.org/10.1016/j.apradiso.2007.06.001

[12]   Mujahid, S.A., Rahim, A., Hussain, S. and Farooq, M. (2008) Measurements of Natural Radioactivity and Radon Exhalation Rates from Different Brands of Cement Used in Pakistan. Radiation Protection Dosimetry, 130, 206-212. http://dx.doi.org/10.1093/rpd/ncm497

[13]   Mohery, M., Baz, S., Lelany, A.M. and Abdallah, A.M. (2014) Environmental Radiation Levels in Soil and Sediments Samples Collected from Floating Water from a Land Runway Resulting from Heavy Rains in the Jeddah Region, KSA. Journal of Radiation Physics and Chemistry, 97, 16-24.
http://dx.doi.org/10.1016/j.radphyschem.2013.10.007

[14]   Oni, O.M., Farai, I.P. and Awodugba, A.O. (2011) Natural Radionuclide Concentrations and Radiological Impact Assessment of River Sediments of the Coastal Areas of Nigeria. Journal of Environmental Protection, 2, 418-423. http://dx.doi.org/10.4236/jep.2011.24047

[15]   Orgunetal, Y., Altinsoy, N., Gultekin, A.H., Karahan, G. and Celebi, N. (2005) Natural Radioactivity Levels in Granitic Plutons and Groundwaters in Southeast Part of Eskisehir, Turkey. Applied Radiation and Isotopes, 63, 267-275. http://dx.doi.org/10.1016/j.apradiso.2005.03.008

[16]   Ramasamy, V., Suresh, G., Rajkumar, P., Murugesan, S., Mullainathan, S. and Meenakshisundaram, V. (2011) Reassessment and Comparison of Natural Radioactivity Levels in Relation to Granulometric Contents of Recently Excavated Major River Sediments. Journal of Radioanalytical and Nuclear Chemistry, 292, 381-393. http://dx.doi.org/10.1007/s10967-011-1486-z

[17]   Agalga, R., Darko, E.O. and Schandof, C. (2013) Preliminary Study on the Levels of Natural Radionuclides in Sediments of the Tono Irrigation Dam, Navrongo. International Journal of Science and Technology, 2, 770-776.

[18]   Tsabaris, C., Eleftheriou, G., Kapsimalis, V., Anagnostou, C., Vlastou, R., Durmishi, C., Kedhi, M. and Kalfas, C.A. (2007) Radioactivity Levels of Recent Sediments in the Butrint Lagoon and the Adjacent Coast of Albania. Applied Radiation and Isotopes, 65, 445-453.
http://dx.doi.org/10.1016/j.apradiso.2006.11.006

[19]   UNSCEAR (2000) Sources and Effects of Ionizing Radiation. United Nations Scientific Committee on the Effects of Atomic Radiation, United Nations Publication, New York.

[20]   Lu, X.W. (2004) Natural Radioactivity in Some Building Materials and By-Products of Shaanxi, China. Journal of Radioanalytical and Nuclear Chemistry, 262, 775-777.
http://dx.doi.org/10.1007/s10967-004-0509-4

[21]   Yang, Y.X., Wu, X.M., Jiang, Z.Y., Wang, W.X., Lu, J.G., Lin, J., Wang, L.M. and Hsia, Y.F. (2005) Radioactivity Concentrations in Soils of the Xiazhuang Granite Area, China. Applied Radiation and Isotopes, 63, 255-259. http://dx.doi.org/10.1016/j.apradiso.2005.02.011