• DAN C. Ozoko Department of Geology and Mining, Enugu State University of Science and Technology, P.M.B 01660, Enugu State, Nigeria - +2348033285798
  • UCHECHUKWU A. EZEH Department of Geology and Mining, Enugu State University of Science and Technology, P.M.B 01660, Enugu State, Nigeria -- +2347032614002


The aim of this study was to determine the extent of heavy metal in natural waters and the uptake by plants that grow in the AMD zones/non-AMD zones in Okpara coal mine. The study areas were classified into zones A, B and c, Water samples from all the three zones were analyzed in the laboratory,Fifteen [15] water samples and six [6] plant leaves samples were collected from the area.The species of plant leaves collected include Polypodiaceae Pteridium Aquilinum, Anacardiaceae Mangifera Indica and Euphorbiaceae Alchornea Cordifolia. Results revealed that Zone A has low pH value of 3.2 and high SO4 (52.30mg/l – 54.42mg/l), Na+ (105.7mg/l – 108.0mg/l) and Fe3+ (7.08mg/l - 13.24mg/l) concentrations, indicating that AMD forming in the zone. In zone B, the pH value ranged from 3.5 to 4.67 and the SO4 (24.02mg/l – 49.55mg/l), Na+ (30.14mg/l – 72.35mg/l) and Fe3+ (0.02mg/l – 9.74mg/l) concentrations indicating the influence of AMD from zone A. Meanwhile, in zone C, the pH ranged from 5.4 – 6.8 and the SO4 (0.83mg/l 26.81mg/l), Na+ (12.05mg/l – 171.0mg/l) and Fe3+ (0.00mg/l – 0.01mg/l) concentrations indicating AMD-free in the zone. Furthermore, the results revealed that plant leaves within the mine are taking up heavy metals but the level of absorption has no effect on their system.


Awoniyi, J.F., 1977. Nigeria mineral industry: Its history, trend and prospect. J. Min. Geo. 14, 73-78.
Egboka, B.C.E., 1985. Water resources problems in the Enugu area of Anambra State, Nigeria. Sci. Bas. Water Res. Mang. 95-106pp.
Egboka, B.C.E., and Uma, K.O., 1985. Acid mine drainage problems in Enugu Coal Mines of Anabra Stae, Nigeria. International Mine Water Association (I.M.W.A) Grenada Spain
Ezeigbo, H.I., and Ezeanyim, B.N.,1993. Environmental pollution from coal mining activities in the Enugu area Anambra State Nigeria. Mine Water and Environment. 12, 53-62.
Kitao, M., Lei, T.T., and Koike, T., 1997. Effect of manganese toxicity on photosynthesis of white birch seedlings. Physiol. Plant. 101, 249-256.
Moncur, M.C., Ptacek, C.J., Blowes, D.W., and Jambor, J.L., 2005. Spatial variations in water composition at a Northern Canadian Lake impacted by mine drainage. Appl. Geochem. 21, 1799-1817.
Nagajyoti, K.L.L., and Sreekkanth, T.V.M., 2010. Heavy metals, occurrences and toxicity for plants: a review. Enviro. Chem. Lett. 8, 199-216.
Nganje, T.N., Adamu, C.I., Ntekim, E.E.U., Ugbaja, A.N., and Nfor, E.E., 2010. Influence of mine drainage on water quality along River Nyaba in Enugu southeastern, Nigeria. African J. Environ. Sci. Tech. 4, 132-144.
Ofodile, M., 2002. Groundwater supply and development in Nigeria. Mecon Geo. 6A: 130-160.
Ofomata, G.E.K., 1965. Factors of soil erosion in Enugu area of Nigeria. J. Geogr. Assoc. Nigeria. 10(1), 3-9.
Ozoko, D.C., 2015. Heavy metal chemistry of acid mine drainage in Onyeama coal mine, Enugu Southeastern Nigeria. Journ. Environ. Earth Sci. 5(10), 120-127.
Plant, J.A., Smith, B., and Williams, J., 2000. Environmental geochemistry at global scale. Journal of Geological Society, London. 157, 837-849.
Ruqia, N., Muslim, K., Muhammed, M., Hamed, U.R., Naveed, U.R., Surrya, S., Muhammed, A., Mohib, U., Muhammed, R., and Zeenat, S., 2015. Accumulation of heavy metals (Ni, Cu, Cd, Cr, Pb, Zn, Fe) in the soil, water and plants and analysis of physico-chemical parameters of soil and water collected from Tanda Dam Kohat. J. Pharm. Sci & Res. 7(3), 89-97.
Salufu, S.O., and Salufu, E.O., 2014.Integrated Study of Acid Mine Drainage and its environmental effects on Onyeama Mine and environs, Enugu, Nigeria. Journal of Multidisciplanary Eng. Science and Technology (J.M.E.S.T). V.1, issue 5, pp.7-12
Sikakwe, G.U., Ephraim, T.N., Nganje, E.E., Ntekim, E.E.N., and Amah, E.A., 2015. Geoenvironmental impact of Okpara coal mine, Enugu, Southeastern Nigeria. Advances
Utom, A.U., Odoh, B.I., Okoro, A.U., and Egboka, N.E., 2012. An investigation into the use of electrical resistivity in aquifer contamination study: a case study. Near Surface Geoscience 2012, France – the 18th European meeting of environmental and engineering geophysics of the near surface geosciences division of EAGE, Paris, 3 -5 sept.
Veridianap, C., Wanilson, L.S., and Wilson, M., 2013. Geochemistry of acid mine drainage from a coal mining area and processes controlling metal attenuation in stream waters, southern Brazil. Annals of the Brazilian Academy of Sciences 2, 539-554.
How to Cite
OZOKO, DAN C.; EZEH, UCHECHUKWU A.. UPTAKE OF NUTRIENTS AND HEAVY METALS INTO PLANTS AROUND OKPARA MINE: COMPARISON WITH SURFACE WATER CHEMISTRY IN ENUGU, SOUTHEASTERN NIGERIA. Arabian Journal of Earth Sciences, [S.l.], v. 3, n. 2, p. 39-50, dec. 2016. ISSN 2409-4730. Available at: <http://asrongo.org/journals/index.php/AJES/article/view/41>. Date accessed: 17 june 2019.


Okpara mine; Acid mine drainage; Plant leaves; Heavy metals