Evaluating Heavy Metal Pollution in Nigerian Coal: Enrichment Factors, Pollution Indices and Environmental Implications
DOI:
https://doi.org/10.70882/josrar.2025.v2i2.58Keywords:
Heavy metal pollution, Nigerian coal deposits, Enrichment factors, Pollution indices, Environmental implicationsAbstract
Heavy metal pollution is a significant environmental concern in Nigeria, particularly in coal deposits. This study evaluates the level of heavy metal pollution in Nigerian coal deposits using enrichment factors and pollution indices. Coal samples were collected from Maganga, Gboko, Onyeama, Okobo, Opoko-Obido, Odagbo and Ofugo coal fields, and the concentrations of lead, arsenic, chromium, manganese, nickel, cobalt, strontium, antimony and barium were determined. The results showed significant levels of heavy metal pollution, with enrichment factors indicating anthropogenic sources. Pollution indices reveal moderate to high levels of pollution. The study highlights the need for effective environmental management and pollution control measures to mitigate the environmental and health risks associated with the heavy metal pollution in Nigerian coal deposits.
References
Asubiojo, O.I., Adebiyi, F.M., Obiajunwa, E.I., and Ajao, J.A. (2012). Elemental Studies of Soil and Food Flour for Risk Assessment of Highway Pollution Using Particle-Induced X-Ray Emission (PIXE) Spectrometry. International Scholarly Research Network ISRN Analytical Chemistry, 2012, 1-9. https://doi.org/10.5402/2012/594598.
Chilikwazi, B., Onyari, J.M., and Wanjohi, J.M. (2023). Determination of Heavy Metals Concentrations in Coal and Coal Gangue obtained from a mine, in Zambia. International Journal of Environmental Science and Technology. 20(2023), 2053–2062. https://doi.org/10.1007/s13762-022-04107-w.
Environmental Protection Agency. (2020). Heavy Metal Pollution. Washington, D.C.: EPA. https://ww.epa.gov.
Fagbenro, A.A., Yinusa, T.S., Ajekiigbe, K.M., Oke, A.O., and Obiajunwa, E.I. (2021). Assessment of heavy metal pollution in soil samples from a gold mining area in Osun State, Nigeria using proton-induced X-ray emission. Scientific African, vol. 14 (2021), 1-13, https://doi.org/10.1016/j.sciaf.2021.e01047.
Food and Agriculture Organization. (2017). Heavy Metals in Food. Rome: FAO. https://www.fao.org.
International Atomic Energy Agency. (2011). Radiation Protection and NORM Residue Management in the Oil and Gas Industry. Vienna: IAEA. www.inis.iaea.org.
International Energy Agency. (2020). Coal 2020. Paris: IEA. www.iea.org.
Itodo, A. U., Edimeh, P. O., Eneji,I. S., and Wuana, R. A. (2020).Radiological impact assessment of mining on soil, water and plant samples from okobo coal field, Nigeria”, Journal of Geoscience and Environmental Protection, 8(5), 65 – 81https://doi.org/4236/gep.2020.85005.
Joseph, E., Ahmed, Y.A., Ikechiamaka, F. N. (2017). Application of k0-INAA technique for the analysis of essential and beneficial heavy elements in soil. FUDMA Journal of Sciences (FJS). Maiden Edition. Vol. 1. No. 1, pp. 1 – 6. https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1210
Joseph, E., Nasiru, R., Ahmed, Y. A. (2011). Trace Elements Pattern in Some Nigerian Commercial Infant Milk and Infant Cereal Formulas. Annals of Biological Research. 2(2):351-360. Scholars Research Library/USA
Kolo, M.T., Khandaker, M.U., Amin, Y.M., Abdullah, W.H.B., Bradley, D.A., and Alzimami, K.S. (2016). Quantification and Radiological Risk Estimation Due to the Presence of Natural Radionuclides in Maiganga Coa, Nigeria, Plos One, 11(6): e0158100 doi: https://doi.org/10.137/journal.pone.0158100.
Nigerian Geological Survey Agency. (2019). Coal Deposits in Nigeria. Abuja: NGSA. www.ngsa.gov.ng.
Ozoko, D.C. (2015). Heavy metal geochemistry of acid mine drainage in Onyeama coal mine, Enugu State, Southeastern Nigeria. Journal of Environmental and Earth Science, 5(10) 120 – 127. http://ww.iiste.org.
Pandey, B., Agrawal, M., and Singh, S., (2014). Assessment of air pollution around coal mining areas: emphasizing on spatial distributions, seasonal variations and heavy metals, using cluster and principal component analysis, Atmospheric Pollution Research, 5(2014) 79 -86. https://doi.org/10.5094/APR.2014.010.
Uloko, F.O., Agomuo, J.C., and Agu, M.N. (2024). Assessment of heavy metal contamination of coal deposits in Kogi State, Nigeria using Instrumental Neutron Activation Analysis, Journal of PhysicsAccess, 4(2) 139–145, http://doi.or/10.47514/phyaccess.2024.4.2.016.
United Nations Environment Programme. (2013). Environmental Impact Assessment of Coal Mining in Nigeria. Nairobi: UNEP. www.unep.org.
World Health Organization. (2018). Heavy Metals. Geneva: WHO. www.who.int.
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Copyright (c) 2025 Felix Omachoko Uloko, Matthew Nnamdi Agu, John Chidowerem Agomuo, Instifanus Abaleni Joseph (Author)
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