The influence of gold mining on radioactivity of mining sites soil in Tanzania
DOI:
https://doi.org/10.6092/issn.2281-4485/13288Keywords:
Radionuclides in mining sites, Tanzania mining pollution, Rwamagasa small scale gold miners, Radiological hazard indices, gamma spectroscopyAbstract
The activity of 226Ra, 232Th and 40K in soil samples were measured by gamma spectrometry using high-purity germanium detector. The study involved 40 samples from four divisions: 10 samples each were drawn from the control area (CTR), washing area 1 (W1), washing area 2 (W2) and the mining pits (MP). Radium and Thorium were measured in highest value (80.44 and 94.62) Bq/kg, respectively at MP-9 while the lowest levels (1.56 and 0.96) Bq/kg, respectively were detected at MP-2. At W1, 40K (max. 887.5 Bq/kg) recorded the highest mean level while 232Th (mean=16.7 Bq/kg) had the lowest level. For W2, 40K (max. 1535.7 Bq/kg) recorded highest level and 232Th (mean = 8.1 Bq/kg) recorded the lowest (10.7 Bq/kg). Results further show that mean activity levels of 226Ra, 232Th and 40K fromining area 42.5, 35.5 and 652.4Bq/kg, respectively. In comparison, the respective average activity for 40K, 226Ra, and 232Th recoded 118.4, 14.5 and 9.7 Bq/kg, respectively in control area. For the sake of assessing the suitability of building materials, hazard indices were calculated and their results were less than unity indicating that, building materials are safe. The annual gonadal equivalent dose, representative gamma index, alpha index revealed values of 484.8 µSv/y, 1.1 and 0.2, respectively. The average annual effective dose was 85.5 mSv which is about 8% greater than the world average. Results show that mining activities in Rwamagasa might be posing radiological hazard to people. Therefore, measures on radioactive materials to the miners and the surrounding community are recommended.
References
ADEMOLA A. K., OBED R. I. (2012) Gamma radioactivity levels and their corresponding external exposure of soil samples from tantalite mining areas in Oke-Ogun, South- Western Nigeria. Radioprotection, 47(2):243-252. DOI: 10.1051/radiopro/2012003
ADEMOLA J. A., ADEMONEHIN S. (2010) Radioactivity concentrations and dose assessment for bitumen and soil samples around a bituminous deposit in Ondo State, Nigeria. Radioprotection, 45(3):359-368. DOI: 10.1051/ radiopro/2010028
AL-JUNDI J., SALAH W., BAWA’ANEH M. S., AFANEH F. ( 2005) Exposure to radiation from the natural radioactivity in Jordanian building materials. Radiation Protection Dosimetry 118(1), 1-4. DOI: 10.1093/rpd/nci332
ALIYU A. S., IBRAHIM U., AKPA C. T., GARBA N. N., RAMLI A. T. (2015) Health and ecological hazards due to natural radioactivity in soil from mining areas of Nasarawa State, Nigeria. Isotopes Environ Health Stud, 51(3):448-68. DOI: 10.1080/10256016.2015.1026339
AMRANI D., TAHTAT M. (2001) Natural radioactivity in Algerian building materials. Applied Radiation and Isotopes 54:687-689. DOI: 10.1016/S0969-8043(00)00304-3
ARAFA W. (2004) Specific activity and hazards of granite samples collected from the Eastern Desert of Egypt. J Environ Radioact, 75(3):315-27. DOI: 10.1016/j. jenvrad.2004.01.004
AVWIRI G. O., AGBALAGBA E. O. (2007) Suvey of gross Alpha and gross Beta Radionuclides Activity in Okpare Greek Delta-State Nigeria. Journal of Applied Science, 7: 3542-3546. DOI: 10.3923/jas.2007.3542.3546
AVWIRI G. O., JAFARU E., ONONUGBO E. (2013) Radiometric assay of hazard indices and excess lifetime cancer due to natural radioactivity in soil profile in Ogba/Egbema Ndoni local government area of rivers state Nigeria. Academic Research International [Online], 4. Available: http://www. savap.org.pk/journals/ARInt./Vol.4(5)/2013(4.5-07).pdf
BERETKA J., MATHEW P.J. (1985) Natural Radioactivity of Australian Building Materials, Industrial Wastes and By Products. Health Physics, 48(1):87-95. DOI: 10.1097/00004032-198501000-00007
ESIOLE S., IBEANU I., GARBA N., ONOJA M. (2019) Determination of radiological hazard indices from surface soil to individuals in Angwan Kawo Gold Mining Sites, Niger State, Nigeria. Journal of Applied Sciences and Environmental Management, 23(8):1541-1547. DOI: 10.4314/jasem.v23i8.19
FAANU A., DARKO E., EPHRAIM J. (2011) Determination of natural radioactivity and hazard in soil and rock samples in a mining area in Ghana. West African Journal of Applied Ecology, 19(1):77-91
FATIMA I., ZAIDI J. H., ARIF M., TAHIR S. N. (2007) Measurement of natural radioactivity in bottled drinking water in Pakistan and consequent dose estimates. Radiat Prot Dosimetry, 123(2):234-240. DOI: 10.1093/rpd/ncl093
FOCUS E., RWIZA M. J., MOHAMMED N. K., BANZI F. P. (2021) Health Risk Assessment of Trace Elements in Soil for People Living and Working in a Mining Area. J Environ Public Health, 9976048. DOI: 10.1155/2021/9976048
HABIB M. A., BASUKI T., MIYASHITA S., BEKELESI W., NAKASHIMA S., TECHATO K., KHAN R., MAJLIS A. B. K., PHOUNGTHONG K. (2018) Assessment of natural radioactivity in coals and coal combustion residues from a coal-based thermoelectric plant in Bangladesh: implications for radiological health hazards. Environ Monit Assess, 191(1):27. DOI: 10.1007/s10661-018-7160-y
IAEA. (2005) Measurements of radionuclides in food and the environment-A Guidebook. International Atomic Energy Agency: Vienna. Available: https://www.iaea.org/ publications/reports/annual-report-2005 [GC(50)/4]
IAEA. (2007) Naturally Occurring Radioactive Material (NORM V). Spain. Available: https://www.iaea.org/ publications/reports/annual-report-2007
INNOCENT A., ONIMISI M., JONAH S. (2013) Evaluation of naturally occurring radionuclide materials in soil samples collected from some mining sites in Zamfara State, Nigeria. British Journal of Applied Science & Technology, 3(4):684-692
ISINKAYE M., JIBIRI N., BAMIDELE S., NAJAM L. (2018) Evaluation of radiological hazards due to natural radioactivity in bituminous soils from tar-sand belt of southwest Nigeria using HpGe-Detector. International Journal of Radiation Research, 16(3):351-362. DOI: 10.18869/acadpub.ijrr.16.2.351
JIBIRI N. N., ADEWUYI G. O. (2008) Radionuclide contents and physico-chemical characterization of solid waste and effluent samples of some selected industries in the city of Lagos, Nigeria. Radioprotection, 43(2):203-212. DOI: 10.1051/radiopro:2007053
JØNSSON J. B., FOLD N. Handling uncertainty: Policy and organizational practices in Tanzania’s small‐scale gold mining sector. Natural Resources Forum, 2009. Wiley Online Library, 211-220.
KAMUNDA C., MATHUTHU M., MADHUKU M. (2016) An Assessment of Radiological Hazards from Gold Mine Tailings in the Province of Gauteng in South Africa. Int J Environ Res Public Health, 13(1). DOI: 10.3390/ ijerph13010138
KIVYIRO D. (2017) Foreign Direct Investments and Technology Transfer In Tanzania: A Case Study of Geita Gold Mining. Master in International Relations, University of Dodoma, Dodoma, Tanzania.
KNOLL G. E. (2000) Radiation Detectibn and Measurement, John Wiley & Sons, Inc, New York.
KOCHER D., SJOREEN A. (1985) Dose-rate conversion factors for external exposure to photon emitters in soil. Health Physics, 48(2):193-205. DOI: 10.1097/00004032- 198502000-00006
KORBLEIN A., HOFFMANN W. (2006) Background radiation and cancer mortality in Bavaria: an ecological analysis. Arch Environ Occup Health, 61(3):109-114. DOI: 10.3200/AEOH.61.3.109-114
LECOMTE J., SHAW P., LILAND A., MARKKANEN M., EGIDI P., ANDRESZ S., MRDAKOVIC-POPIC J., LIU F., DA COSTA LAURIA D., OKYAR H. (2019) Radiological protection from naturally occurring radioactive material (NORM) in industrial processes.
LIU W., MA L., ABUDUWAILI J. (2020) Anthropogenic Influences on Environmental Changes of Lake Bosten, the Largest Inland Freshwater Lake in China. Sustainability, 12(2): 711. DOI: 10.3390/su12020711
MALANCA A., PESSINA V., DALLARA G. (1993) Radionuclide content of building materials and gamma ray dose rates in dwellings of Rio Grande Do Norte, Brazil. Radiation protection dosimetry, 48(2):199-203. DOI: 10.1093/oxfordjournals.rpd.a081865
MOHAMMED N.K., MAZUNGA M.S. (2013) Natural radioactivity in soil and water from likuyu village in the neighborhood of mkuju uranium deposit. International Journal of Analytical Chemistry, 501856. DOI: 10.1155/2013/501856
MUNYAO L. N., KETUI D. K., OTIENO C., CHEGE M. W. (2020) Assessment of levels of natural radioactivity in sand samples collected from Ekalakala in Machakos County, Kenya. The Scientific World Journal, 2020.
MWAIPOPO R., MUTAGWABA W., NYANGE D. (2004) Increasing the Contribution of Artisanal and Small-Scale Mining to Poverty Reduction in Tanzania. Department for International Development: London, UK. Available: https:// www.researchgate.net/publication/242636212_Increasing_ the_contribution_of_artisanal_and_small-scale_mining_ to_poverty_reduction_in_Tanzania_Based_on_an_analysis_ of_mining_livelihoods_in_Misungwi_and_Geita_Districts_ Mwanza_region
NTIHABOSE L. (2010) Assessment of Heavy Metal Fluxes and Radiation Exposure due to Norm in Extraction and Processing of Coltan Ores in Selected Areas of Rwanda. Master’s Department of Physics, University of Nairobi.
OSORO M., RATHORE I., MANGALA M., MUSTAPHA A. (2011) Radioactivity in surface soils around the proposed sites for titanium mining project in Kenya. Journal of Environmental Protection, 2011(2):460-464.
SARIN M., KRISHNASWAMI S., MOORE W. (1990) Chemistry of uranium, thorium, and radium isotopes in the Ganga-Brahmaputra river system: Weathering processes and fluxes to the Bay of Bengal. Geochimica et Cosmochimica Acta, 54(5):1387-1396. DOI: 10.1016/0016-7037(90)90163-F
STUCCHI A., KSIEZNIAK J., HUSSAINI S. (2012) Mining in Tanzania: Africa’s Golden Child. Engineering and Mining Journal. Available: https://www.gbreports.com/wp- content/uploads/2014/09/Tanzania_Mining2012.pdf
TUFAIL M., NASIM A., SABIHA J., HAMID T. (2007) Natural radioactivity hazards of building bricks fabricated from saline soil of two districts of Pakistan. J Radiol Prot, 27(4): 481-492. DOI: 10.1088/0952-4746/27/4/009
UNEP. (2012) Analysis of formalization approaches in the artisanal and small-scale gold mining sector based on experiences in Ecuador, Mongolia, Peru, Tanzania and Uganda. United Nations Environment Programme.
UNSCEAR. (1982) Ionizing radiation: Sources and biological effects. UNITED NATIONS: New York.
UNSCEAR. (1993) Sources, effects and risks of ionizing radiation. New York.
UNSCEAR. (2000) Effects and risks of ionizing radiation. UNEP: New York.
UNSCEAR. (2020) Ionizing radiation: Sources and biological effects. United Nations Scientific Committee on the Effects of Atomic Radiation.
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