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The concentration of heavy metals in the sediments of the river nun estuary, around Akassa, Niger Delta, Nigeria

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Author Affiliations

  • 1Department of Biological Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
  • 2Department of Biological Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria

Int. Res. J. Biological Sci., Volume 12, Issue (1), Pages 10-15, May,10 (2023)

Abstract

Levels of the heavy metals lead (Pb), cadmium (Cd), nickel (Ni), zinc (Zn), and manganese (Mn) were analyzed in the sediments of the River Nun estuary. This was done in order gauge the impact of anthropogenic inputs such as pesticides, fertilizers, oil spillage and other industrial and anthropogenic wastes disposal, especially at the coastal parts of the region on bottom sediments. Three sampling Stations were chosen for the purpose of this research. Station 1 (Buo-Ama Creek) was established close to the entrance of Buo-Ama creek, in the Nun River estuary. Station 2 (Erewei-Kongho) was established along one of the tributaries of the Nun River estuary around Erewei-Kongho. Station 3 was established in Ogbokiri. Soil samples were collected with the aid of a soil auger and a galvanized metal core cylinder from three (3) sampling stations along a transect running from the low intertidal level (LIL), through the mid intertidal level (MIL) to the high intertidal level (HIL). Soil samples were analysed in the laboratory using the method of Atomic Absorption Spectrophotometer (AAS). Means and standard deviations were calculated for all the measured parameters. A one-way ANOVA was employed at the 95% confidence limit to test for differences across stations in the heavy metals. Turkey HSD post HOC test was also employed to separate means and identify where variability and similarities exist. This was aided by the SPSS 20.0 statistical tool kit. The result shows that Pb has the highest concentration, followed by Zn, Ni, Cd, and Mn respectively. The lowest values of all metals were observed at station 2, while the highest concentrations of metals were recorded at sampling stations 1. The results show that the value of Pb was highest in station 1(1.347±0.001), followed by Station 3 (1.24±0.001). Station 2 had the least mean value of Pb (0.884±0.001). Cd showed similar patterns across the three sampling stations 1, 2 and 3, with the values 0.068±0.002, 0.046±0.001, and 0.054±0.002 respectively. Ni also presented slight difference across the three sampling stations. Concentration of Zn were higher in station 1 and 2 (1.265±0.002 and 1.038±0.002), than in station 3 (0.725±0.001). All metal concentration was however lower than the international permissible limit. The concentrations of Mn were also observed to present a similar pattern across the sampling stations. There is a significant difference (P<0.05) in all heavy metal parameters across all stations. Heavy Metal Concentrations were found to decrease with increasing distance from the river mouth, suggesting that anthropogenic inputs, related to agricultural and domestic discharge into the river, are the major sources of heavy metals in the river sediments. Land based activities therefore have a profound effect on aquatic ecosystem stability and health.

References

  1. Banerjee U. and Gupta S. (2012)., Source and distribution of lead, cadmium, iron and manganese in the river Damodar near Asansol Industrial Area, West Bengal, India., International Journal of Environmental Science, 2(3), 1531-1542.
  2. Barakat A., El Baghdadi M., Rais J. and Nadem S. (2012),, Assessment of heavy metal in surface sediments of Day River at Beni-Mellal region, Morocco., Research Journal of Environmental and Earth Sciences, 4(8), 797-806.
  3. Chiodi Boudet, L. N., Escalante, A. H., Von Haeften, G., Moreno, V., & Gerpe, M. S. (2011)., Assessment of heavy metal accumulation in two aquatic macrophytes: A field study., Journal of the Brazilian Society of Ecotoxicology, 6(1), 57-64.
  4. Naseri, M., Vazirzadeh, A., Kazemi, R. & Zaheri, F. (2015)., Concentration of some heavy metals in rice types available in Shiraz market and human health risk assessment., Food Chem. 175, 243—248.
  5. Ji, Y., Wu, P., Zhang, J., Zhang, J., Zhou, Y., Peng, Y., ... & Gao, G. (2018)., Heavy metal accumulation, risk assessment and integrated biomarker responses of local vegetables: A case study along the Le, Chemosphere, 199, 361-371.
  6. Gijo, A. H., Hart, A. I., & Seiyaboh, E. I. (2017)., The impact of makeshift oil refineries on the physico-chemistry of the sediments of the nun river estuary, Niger Delta, Nigeria., Sky Journal of Soil Science and Environmental Management, 6(1), 019-025.
  7. KuntalShah, D., & Reddy, M. N. (2014)., Accumulation of Heavy Metals by Some Aquatic Macrophytes in Estuarine Zone of River Tapi, Surat, Gujarat, India., International Journal of Innovative Research in Science, Engineering and Technology, 3(4), 1.
  8. World Health Organization. (2003)., Zinc in drinking-water. Background document for preparation of WHO Guidelines for drinking-water quality., World Health Organization, Geneva, Switzerland.
  9. RSMENR (2002)., Rivers State Ministry of Environment and Natural Resources., Interim guidelines and Standards on environmental pollution control and management. Pp. 39-45
  10. World Health Organization (2006)., Guidelines for Drinking-water Quality: First Addendum to Volume 1, Recomendations., World Health Organization.
  11. Council, E. U. (1998)., Council directive 98/83 about water quality intended for human consumption., Official Journal of the European Communities L, 330, 32-54.
  12. NSDWQ, U. (2007)., Nigerian standard for drinking water quality., Nigerian Industrial Standard, NIS, 554, 13-14.
  13. FEPA, A. (1991)., Guidelines and standards for environmental pollution control in Nigeria., Federal Environmental Protection Agency (FEPA), Lagos, Nigeria.
  14. EC (2005)., Commission regulation (EC) No. 78/2005 of 19 January 2005 amending regulation (EC) No. 466/2001 as regards heavy metals., Official J. Eur. Union, 43-45.
  15. UNEP (1985)., Determination of Total Hg in marine sediments and suspended solids by cold vapour AAS., Reference methods for marine pollution studies. Vol. 26. pp. 1-28
  16. Nicolaidou, A., & Nott, J. A. (1989)., Heavy metal pollution induced by a ferro-nickel smelting plant in Greece., Science of the total environment, 84, 113-117.
  17. Obokoro, O. J. (2017)., Heavy metals in the sediments of Apparanbie Creek, Niger Delta Nigeria., Research project. Pp. 31-38.
  18. Iwegbue, C. M. A., Nwajei, G. E., & Arimoro, F. O. (2007)., Assessment of contamination by heavy metals in sediments of Ase River, Niger Delta, Nigeria., Research Journal of Environmental Sciences, 1(5), 220-228.
  19. Ideriah T. J. K., David-Omiema S., and Ogbonna D. N., (2012)., Distribution of Heavy Metals in Water and Sediment along Abonnema Shoreline, Nigeria., Resources and Environment, 2(1), 33-40
  20. Turekian K.K. and Wedepohl K.H. (1961)., Distribution of the elements in some major units of the Earth, Geological Society of America Bulletin, 72, 175-192.