International Journal of Applied Science and Engineering Research
  • Year: 2016
  • Volume: 5
  • Issue: 4

Evaluation of the impact of Ota industrial estate effluents on surface water quality of Oruku river, Ota, South Western Nigeria

1Chemistry Unit, School of Science and Technology, National Open University of Nigeria

2Department of Chemistry, University of Ibadan

*Corresponding author (e-mail: faysal.tex@gmail.com)

Online published on 16 February, 2018.

Abstract

The effect of industrial effluents on surface water quality of Oruku River was investigated in this study. Samples were collected at five different points (SR1-SR5) and at four different periods spanning through November, 2010 to May, 2011 and were analysed for physicochemical characteristics. Water quality indicators; pH, dissolved oxygen (DO) and total dissolved solids (TDS) were examined amongst other physicochemical parameters. The average pH of the surface waters ranged from 5.53±0.31 to 6.23±0.45 with SR3 having the highest value. This indicates that all the water sources were alkaline. The DO levels were within the required DO levels (5-8mg/L) for the sustenance of aquatic life and hence, the water source is considered suitable for aquatic life and unfit for drinking purposes. The level of the measure of gross organic pollution, COD in the surface waters showed that they were organically polluted.

Keywords

surface water quality, pollution, pollution indicators, industrial effluents, Chemical Oxygen Demand (COD), TDS, heavy metals, Oruku