Journal of
Environmental Chemistry and Ecotoxicology

  • Abbreviation: J. Environ. Chem. Ecotoxicol.
  • Language: English
  • ISSN: 2141-226X
  • DOI: 10.5897/JECE
  • Start Year: 2009
  • Published Articles: 184

Full Length Research Paper

Seasonal assessment of the physico-chemical properties of surface water and sediments in the vicinity of a scrap metal recycling industry in Southwestern Nigeria

Okoya, A. A.
  • Okoya, A. A.
  • Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria.
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Elufowoju, M. A.
  • Elufowoju, M. A.
  • Environmental Health Department, Osun State College of Health Technology, Ilesa, Nigeria.
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Adepoju, K. A.
  • Adepoju, K. A.
  • Department of Geography, Faculty of Natural and Agricultural Sciences, University of the Free State, South Africa.
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Akinyele, A. B.
  • Akinyele, A. B.
  • Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria.
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  •  Received: 17 December 2019
  •  Accepted: 02 March 2020
  •  Published: 31 March 2020

Abstract

The study assessed the seasonal variations in the physico-chemical properties of surface water and sediments in some villages located around a scrap metal recycling industry in Ile-Ife. This is with a view to monitor the impact of the industry on the quality of surrounding water. The three water bodies (one river, one stream and one pond) identified in the area were sampled every other month for ten months. Water and sediment were sampled from the water bodies and their physico-chemical properties were determined using standard methods. Highest and least pH values: 7.15 ± 0.29 and 6.27 ± 0.26 were recorded in river and pond water sample, respectively during dry season, while the least pH values: 5.64 ± 0.09 were recorded in sediment samples from the river during wet season. Fe in water was highest in pond during dry season with (0.10 ± 0.01) mg/L. Stream sediment recorded higher values of Fe (1.02 ± 0.05) mg/kg, Zn (0.48 ± 0.01) mg/kg and Pb (0.09 ± 0.01) mg/kg than in stream water samples, while the values of pH, Mn, Cd and Cr (6.95 ± 0.03, 0.67 ± 0.11, 0.11 ± 0.02, 0.17 ± 0.03)mg/L respectively in stream water were higher than in stream sediment samples. In River, Fe and Zn values were higher in sediment (0.63 ± 0.04 and 0.52 ± 0.01)mg/kg respectively than in water samples, while in the pond pH, Mn, Cd and Cr were higher in water (6.51 ± 0.12, 0.71 ± 0.07, 0.09 ± 0.01 and 0.22 ± 0.03)mg/L respectively than in sediment samples. The study concluded that the scrap metal recycling industry has impact on the surrounding water bodies as the values of cadmium, lead and iron significantly exceeded the national and international standards.

Key words: Physico-chemical, standards, sediment, scrap metal, seasonal, surface water.