Toxicity potential of automobile carbon monoxide emission along a majour highway in Sango-Ota, Ogun State, Nigeria
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This study investigated the toxicity potential of carbon monoxide along a major highway in
Sango-Ota, an emerging city, in Nigeria. Ambient air carbon monoxide was monitored and measured
at ten different locations using the GM8805 benetech carbon monoxide monitor. Coca-Cola junction
was selected as the control location for this study. The 1-hr averaging period measured for carbon
monoxide concentrations within the selected locations ranged between 25.2 ppm and 29.3 ppm while at
the control point, it was measured to be 8 ppm. The extrapolated 8-hr averaging period for carbon
monoxide concentration ranged between 14.076 ppm and 16.366 ppm with the concentration at the
control point being at 4.4688 ppm. The extrapolated 24-hr averaging period for carbon monoxide
concentration ranged between 10.357 ppm and 12.042 ppm with the concentration at the control point
being 3.288 ppm. An assessment of toxicity potential of these locations based on Federal Environmental
Protection Agency (FEPA), United States Environmental Protection Agency (USEPA) and World
Health Organization (WHO) statutory limits were all above unity (one) except at the control location
and this poses as a threat to human lives. These values showed unhealthy air conditions at these regions
of the emerging city. This study establishes that traffic congestions contribute significantly to the
ambient air thereby reducing its quality thus calls for the attention of regulatory bodies to rise to
protection of commuters and businessmen along the major highways in emerging cities in Nigeria.
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TP Chemical technology