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A Radiological Survey in Tailings: A Case Study of Rosterman Gold Mine, Western Kenya

DOI: 10.4236/oalib.1106293, PP. 1-9

Subject Areas: Nuclear Physics

Keywords: Tailing Samples, Rosterman Gold Mine, Gamma Ray Spectrometry, Radionuclides

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Abstract

Thirty samples of tailing waste weighing 200 g were randomly collected from both active and inactive tunnels at the Rosterman gold mine site in western Kenya. The average activity concentration of the radionuclides (40K, 232Th and 238U) analyzed by the gamma-ray spectrometry in the tailing samples was 260 ± 14.29 Bq/Kg for 40K, 118 ± 8.25 Bq/Kg for 232Th and 81 ± 3.63 Bq/Kg for 238U. The corresponding radiological parameters for all the collected thirty tailing waste samples were determined from the specific mean activity concentrations. The average dose rate for all the samples was 54 nGy/h. The average radium equivalent value was 262 ± 12.04 Bq/Kg with a range of 154 ± 6.42 Bq/Kg to 350 ± 10.24 Bq/Kg. The average values of external and internal indices were 0.6 ± 0.03 mSv/y and 0.7 ± 0.04 mSv/y respectively. The average indoor and outdoor annual effective dose rates that were determined for this study were 0.3 ± 0.02 and 0.2 ± 0.01 respectively. Therefore, the tailing samples recorded doses and radiological indices below the world average permissible values. This implies that the radiation exposure to the miners and general public due to tailing wastes at Rosterman gold mine poses no significant health risk.

Cite this paper

Wanyama, C. K. , Makokha, J. W. and Masinde, F. W. (2020). A Radiological Survey in Tailings: A Case Study of Rosterman Gold Mine, Western Kenya. Open Access Library Journal, 7, e6293. doi: http://dx.doi.org/10.4236/oalib.1106293.

References

[1]  Faanu, A., Lawluvi, H., Kpeglo, D.O., Darko, E.O., Emi-Reynolds, G., Awudu, R., Adukpo, O.K., Kansaana, C., Ali, I.D., Agyeman, B., Agyeman, L. and Kpodzro, R. (2013) Assessment of Natural and Anthropogenic Radioactivity Levels in Soils, Rocks, and Water in the Vicinity of Chirano Gold Mine in Ghana. Radiation Protection Dosimetry, 158, 87-99. https://doi.org/10.1093/rpd/nct197
[2]  Mam, U. (2007) Gamma-Ray Spectroscopic Analysis of Selected Samples from the Nile River Sediments in Upper Egypt. Radiation Protection Dosimetry, 123, 215-220. https://doi.org/10.1093/rpd/ncl103
[3]  Kamunda, C., Mathuthu, M. and Madhuku, M. (2016) An Assessment of Radiological Hazards from Gold Mine Tailings in the Province of Gauteng in South Africa. International Journal of Environmental Research and Public Health, 13, 138. https://doi.org/10.3390/ijerph13010138
[4]  Faanu, A., Adukpo, O.K., Tettey-Larbi, L.H., Kpeglo, D.O., Darko, E.O., Emi-Reynolds, G., Awudu, R.A., Kansaana, C., Amoah, P.A., Efa, A.O., Ali, I.D., Agyeman, B., Agyeman, L. and Kpodzro, R. (2016) Natural Radioactivity Levels in Soils, Rocks, and Water at a Mining Concession of Perseus Gold Mine and Surrounding Towns in the Central Region of Ghana. Springerplus, 5, 98. https://doi.org/10.1186/s40064-016-1716-5
[5]  UNSCEAR (2008) United Nations Scientific Committee on the Effects of Atomic Radiation, Sources, and Effects of Ionizing Radiation. Report to General Assembly, with Scientific Annexes United Nations. United Nations, New York.
[6]  UNSCEAR (2017) Sources and Effects of Ionizing Radiation. Report to General Assembly, with Scientific Annexes. United Nations, New York.
[7]  Tettey-Larbi, L., Darko, E.O., Schandorf, C., Appiah, A.A., Sam, F., Faaanua, A., Okoh, D.K., Lawluvi, H., Agyeman, B.K., Kansaana, C., Amoah, P.A., Osei, R.K., Agalga, R. and Osei, S. (2013) Gross Alpha and Beta Activity and Annual Committed Effective Doses Due to Natural Radionuclides in Some Medicinal Plants Commonly Used in Ghana. International Journal of Science & Technology, 3, 217-229.
[8]  Ajithra, A. and Shanthi, G. (2016) Assessment of Beach sand Using Gamma Ray Spectrometer in Thiruvananthapuram District, Kerala of South India. International Journal of Technology & Engineering, 5, 56-69. https://doi.org/10.21013/jte.v5.n3.p2
[9]  Odumo, B.O., Nanos, N., Carbonell, G., Torrijos, M., Patel, J.P. and Rodríguez Martín, J.A. (2018) Artisanal Gold-Mining in a Rural Environment: Land Degradation in Kenya. Land Degradation and Development, 29, 3285-3293. https://doi.org/10.1002/ldr.3078
[10]  Kenya National Bureau of Statistics (2009) Population of Lurambi Sub-County. https://www.knbs.or.ke
[11]  Independent Electoral and Boundaries Commission (2013) Map of Rosterman Gold Mine, Lurambi Sub-County, Kakamega County, Kenya.
[12]  Matsitsi, M.S., Linturi, J.M., Kebwaro and Maweu, M.O. (2019) Effects of Seasonal Change on the Levels of Geogenic Radionuclides in Sand and Rocks from Tyaa River Deposit in Kitui County. International Journal of Fundamental Physical Sciences, 9, 14-19. https://doi.org/10.14331/ijfps.2019.330124
[13]  Kebwaro, M.J. (2009) Gamma Ray Spectrometry Analysis of the Surface Soil around Mrima Hill, Kenya Using NaI (TI) Detector and Decomposition Technique. M.Sc. Thesis, Kenyatta University, Nairobi.
[14]  IAEA (2010) Handbook of Parameter Values for the Prediction of Radionuclide Transfer in Terrestrial and Freshwater Environments. International Atomic Energy Agency.
[15]  Samuel, O. (2015) Radiometric Survey and Estimation of Radiation from Archean Rocks: A Case Study of the Migori Gold Belt Complex, Kenya. M.Sc., Physics Kenyatta University, Nairobi.
[16]  Quindos, L.S., Fernandez, P.L. and Soto, J. (1987) Building Material as a Source of Exposure in Houses. Indoor Air, 87, 365.
[17]  Fujiyoshi, R. and Sawamura, S.J. (2004) Mesoscale Variability of Vertical Profiles of Environmental Radionuclides (40K, 226Ra, 210Pb and 137Cs) in Temperate Forest Soils in Germany. Science of the Total Environment, 320, 177-188. https://doi.org/10.1016/j.scitotenv.2003.08.007
[18]  Kinyua, R., Atambo, V.O. and Ongeri, R.M. (2011) Activity Concentrations of 40K, 232Th and 228Ra and Radiation Exposure of Tabaka Soapstone Quarries of the Kisii Region, Kenya. African Journal of Environmental Science and Technology, 5, 682-688.
[19]  IAEA (1996) International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources, Safety Series No. 115. IAEA, Vienna.
[20]  ICRP (1991) Annual Limits on the Intake of Radionuclides by Workers Based on 1990 Recommendations. International Commission of Radiological Protection 66. Annals of the ICRP, 21, 1-41.
[21]  ICRP (2007) 2006 Recommendations of the International Commission on Radiological Protection. ICRP Publication No. 103, Pergamon Press, Oxford.
[22]  Darko, E.O., Faanu, A., Razak, A., Emi-Reynolds, G., Yeboah, J., Oppon, O.C. and Akaho, E.H.K. (2010) Public Exposure Hazards Associated with Natural Radioactivity in Open-Pit Mining in Ghana. Radiation Protection Dosimetry, 138, 45-51. https://doi.org/10.1093/rpd/ncp181
[23]  Lu, X.W., et al. (2005) Specific Activity and Hazards of Archeozoic-Cambrian Rock Samples Collected from the Weibei Area of Shaanxi, China. Radiation Protection Dosimetry, 118, 352-359. https://doi.org/10.1093/rpd/nci339
[24]  Higgy, R., El-Tahawy, M., Abdel-Fattah, A. and Al-Akabawy, U.J. (2000) Radionuclide Content of Building Materials and Associated Gamma Dose Rates in Egyptian Dwellings. Journal of Environmental Radioactivity, 50, 253-261. https://doi.org/10.1016/S0265-931X(00)00017-5
[25]  El-Taher, A. and Al-Zahrani, J. (2014) Radioactivity Measurements and Radiation Dose Assessments in Soil of Al-Qassim Region, Saudi Arabia. The Vicinity of Chirano Gold Mine in Ghana. Radiation Protection Dosimetry, 158, 87-99.

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