African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1126

Full Length Research Paper

The impacts of auto-mechanic workshops on soil and groundwater in Ibadan metropolis

  1Department of Zoology, University of Ilorin, Kwara State, Nigeria. 2Department of Zoology, University of Ibadan, Nigeria. 3Department of Biological Sciences, Federal University of Agriculture, Abeokuta, Nigeria
Email: [email protected]

  •  Accepted: 01 July 2013
  •  Published: 30 September 2013



The extents of groundwater and soil pollution arising from auto-mechanic activities from auto-mechanic workshops at Ibadan metropolis were examined. Groundwater and top soil samples from auto-mechanic villages and control site were collected fortnightly over a period of two months and analysed for both physicochemical parameters and some heavy metals. Results of physicochemical parameters of groundwater ranged from 23 to 29°C for temperature, 0.25 to 8.64 mg/L for DO, 0 to 52.19 mg/L for BOD, 14.7 to 205.86 mg/L for COD, 5.63 to 7.33 for pH, 18 to 133 mg/L for total alkalinity, 23 to 287 mg/L for total hardness, 2 to 32.75 F.T.U for turbidity, 187 to 268 µs/cm for conductivity, 0.7 to 44.6 mg/L for TSS, 135 to 248 mg/L for TDS, 136.3 to 292.6 mg/L for TS, 0.03 to 62.1 mg/L for nitrate, 2.37 to 12.02 mg/L for phosphate, and 0 to 55.6 mg/L for oil and grease. Results of heavy metals analysis for groundwater ranged from 0 to 1.132 mg/L for Cd, 0 to 24.46 mg/L for Pb and 0 to 24.6 mg/L for Fe. Statistical analysis, using Pearson’s correlation coefficient indicated correlations of some parameters at P≤0.01 and 0.05. The mean and standard deviations of the parameters were also calculated. The daily activities of auto-mechanic workshops have negative impacts on both soil and water.



Key words: Ibadan Metropolis, mechanic workshop, pollutants, soil, groundwater