Abstract
Studies have been carried out in a Goldmine in Ghana to determine the exposure of the public to naturally occurring radioactive materials from processing of gold ore. Direct gamma spectrometry and neutron activation analysis techniques were used to analyse soil, rock, water and dust samples from the mining environment. The mean activity concentrations measured for 238U, 232Th and 40K in the soil/rock samples were 15.2, 26.9 and 157.1 Bq kg − 1, respectively. For the water samples, the mean activity concentrations were 0.54 and 0.41 Bq l − 1) and 7.76 Bq l − 1 for 226Ra, 232Th and 40K, respectively. The mean activity concentrations measured in the dust samples were 4.90 and 2.75 μBq m − 3 for 238U and 232Th, respectively. The total annual effective dose to the public was estimated to be 0.69 mSv. The results in this study compared well with typical world average values. The results indicate an insignificant exposure of the public from the activities of the Goldmine.
Similar content being viewed by others
References
Andreo, B., & Carrasco, F. (1999). Application of geochemistry and radioactivity in the hydrogeological investigation of carbonate aquifers (Sierras Blanca and Mijas, southern Spain). Applied Geochemistry, 14, 283–299.
ASTM (1983). Standard method for sampling surface soils for radionuclides (pp. 983–998). American Society for Testing Materials, Report No. C (PA: ASTM).
ASTM (1986). Recommended practice for investigation and sampling soil and rock for engineering purposes’. In Annal Book of ASTM Standards; (04/08). American Society for Testing Materials, Report No. D, 420 (PA: ASTM), 109–113.
Avotri, T. S. M, Amegbey, N. A, Sandow, M. A., & Forson, S. A. K. (2002). The health impact of cyanide spillage at Goldfields Ghana Ltd, Tarkwa, Ghana’, (funded by Goldfields Ghana limited, GFGL).
Darko, E. O., & Faanu, A. (2007). Baseline radioactivity measurements in the vicinity of a Gold Treatment Plant. Journal of Applied Science and Technology, 10(1–2), 18–24.
Darko, E. O., Tetteh, G. K., Akaho, E. H. K. (2005). Occupational radiation exposure to norms in a gold mine. Radiation Protection Dosimetry, 114(4), 538–545.
Darko, E. O., Faanu, A., Razak, A., Emi-Reynolds, G., Yeboah, J., Oppon, O. C., Akaho, E. H. K. (2010). Public exposure hazards associated with natural radioactivity in open-pit mining in Ghana. Radiation Protection Dosimetry, 138(1), 45–51.
de Oliveira, J., Paci Mazzilli, B., da Costa, P., Akiko Tanigava, P. (2001) Natural radioactivity in Brazilian bottled waters and consequent doses. Journal of Radioanalytical and Nuclear Chemistry, 249(1), 173–176.
GFGL (2007). Securing the future: Mineral resource and ore reserve statement. Tarkwa: Tarkwa Goldmine Ltd.
GSB (2005). Water quality-requirements for drinking water. Ghana Standards Board, GS 175 PT.1:2005.
IAEA (1996). International basic safety standards for protection against ionising radiation and for the safety of radiation sources. Safety Series No. 115, IAEA, Vienna.
IAEA (2005). Naturally occurring radioactive materials (IV). In Proceedings of an international conference held in Szczyrk, IAEA-TECDOC-1472’. Poland.
ICRP (1991). 1990 recommendations of the International Commission on Radiological Protection. Oxford: Pergamon, ICRP Publication 60.
ICRP (2007). 2006 recommendations of the International Commission on Radiological Protection. Oxford: Pergamon, ICRP Publication 103.
IFC (2003). Socio-economic baseline and impact assessment report. Community Development Plan, Iduapriem and Teberebie Goldmines, GAGL, International Finance Corporation Ghana.
Kortatsi, B. K. (2004). Hydrochemistry of groundwater in the mining area of Tarkwa-Prestea, Ghana’. PhD thesis, University of Ghana, Legon-Accra, Ghana.
Kumah, J. S. (2007). Hydrogeological studies on the Tarkwa gold mining District, Ghana. Bulletin of Engineering Geology and the Environment, 66(1), 89–99.
Kuma, J. S., & Younger, P. L. (2001). Pedological characteristics related to groundwater occurrence in the Tarkwa area, Ghana. Journal of African Earth Sciences, 33(2), 363–376.
Tzortzis, M., & Tsertos, H. (2004). Determination of thorium, uranium and potassium elemental concentrations in surface soils in Cyprus. Journal of Environmental Radioactivity, 77, 325–338.
UNSCEAR (1993). Exposures from natural sources of radiation, 1993 Report to General Assembly. Annex A, New York.
UNSCEAR (2000). Exposures from Natural Sources, 2000 Report to General Assembly. Annex B, New York.
Uosif, M. A. M. (2007). Gamma-ray spectroscopic analysis of selected samples from the Nile river sediments in Upper Egypt. Radiation Protection Dosimetry, 123(2), 215–220.
WHO (2004). Guidelines drinking-water quality (Vol. 1 recommendations, 3rd ed.). Geneva: World Health Organization.
Xinwei, L., Lingquig, W., Xiaodan, J., Leipeng, Y., Gelian, D. (2006). Specific activity and hazards of Archeozoic-Cambrian rock samples collected from the Weibei area of Xhaanxi, China. Radiation Protection Dosimetry, 118(3), 352–359.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Faanu, A., Ephraim, J.H. & Darko, E.O. Assessment of public exposure to naturally occurring radioactive materials from mining and mineral processing activities of Tarkwa Goldmine in Ghana. Environ Monit Assess 180, 15–29 (2011). https://doi.org/10.1007/s10661-010-1769-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10661-010-1769-9