Spatial Variation of Pollutant Gases and Particulate Matterin the Ambient Air of Addis Ababa
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Date
2018-06-02
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Addis Ababa University
Abstract
This research work presents analysis the spatial variation of ambient air pollutants patterns in Addis Ababa city area with integration of Geographical Information System (GIS).The goal of this study is to quantify and identify the spatial distribution of the four air pollutant gases namely CO, SO2, NO2, VOCs, and the particulate matter (PM10) in the city by the land utilization category(industrial, transport, and residential area)because of their public health risks and also their magnitude in the cities air is not known. Fifty four sampling locations are selected for ambient air pollutant gas and twenty sampling locations are selected for particulate matter (PM10). Three common locations are selected as control area. Samples were collected during the dry season (January, 1- April 30, 2017 at a total of seventy seven sites. The average mean concentrations of the air pollutants in cities were CO=14.10 ppm, NO2=0.18ppm, SO2= 0.30ppm, and VOCs=526.6 μg/m3.The average mean concentration of the pollutant gases obtained at different land use in the city is indicted as follows: Traffic related area [CO=14.99ppm, NO2 =0.24ppm, SO2=0.51ppm, VOCs =563 μg/m3], Industrial area [CO=14.63ppm, NO2 =0.27ppm, SO2=0.51ppm, VOCs=563 μg/m3], and Residential area [CO=11.67ppm, NO2 =0.16ppm, SO2=0.2ppm, VOCs=342 μg/m3]. The particulate matter (PM10) mass concentrations found to be with mean concentration of 326 μg/m3. The mean value of the pollutants in the ambient air of Addis Ababa were found to be above the prescribed standards of East African Standards, WHO and others international standards.
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Particulate Matter, Nitrogen Dioxide, Sulfur Dioxide, Carbon Dioxide, Vocs