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Evaluation of Ambient Air quality in parts of Imo state, Nigeria

Author Affiliations

  • 1Department of Chemistry, Imo State University P.M.B 2000, Owerri, Imo State, NIGERIA
  • 2Department of Chemistry, Federal University of Technology P. M.B. 1526, Owerri, Imo State, NIGERIA
  • 3Department of Geology, Federal University of Technology 1526, Owerri, Imo State, NIGERIA

Res.J.chem.sci., Volume 6, Issue (1), Pages 41-52, January,18 (2016)

Abstract

Evaluation of the ambient air quality in Imo State, Nigeria was carried out with reference to four criteria air pollutants which include PM10, NO2, SO2 and CO using Haze dust particulate monitor (10m) and Gasman air monitors. Air quality monitoring was conducted in three times daily (morning, Afternoon and evening) in 22 locations within the months of November, 2014 and June, 2015. The result showed that the mean concentration of the air pollutants ranged as follows: PM10 (5.22 - 7.43) mg/m3, NO2 (0.46 - 0.58) ppm, SO2 (0.46 - 0.56) ppm and CO (30.15 - 40.98) ppm. The mean concentration of the air pollutants obtained exceeded the Nigerian NAAQS and US NAAAQS but NO2 and SO2 are within the permissible limit in some of the monitoring stations. Also AQI (air quality index) analysis revealed that CO is the conditional pollutant responsible for the observed deteriorated air quality index in the study area which calls for adequate attention and concern.

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