TITLE:
Determination of the Types of Air Pollutants Prepondering in the City of Lome in Togo (West Africa)
AUTHORS:
Lawson Tevi Atator, Hodabalo Kamou, Anissou Bawa, Kodjovi Mawuégnigan Léonard Agbodan, Akpisso Aniko Polo, Hodabalo Pereki, Sêmihinva Ben Akpavi, Koffi Akpagana
KEYWORDS:
Gas Emission, Industries, Transport, Landfills, City of Lomé, Togo
JOURNAL NAME:
Atmospheric and Climate Sciences,
Vol.11 No.4,
October
27,
2021
ABSTRACT: The increase in the urban population and the high
concentration of many anthropogenic
activities in certain regions of the world lead to atmospheric disturbances.
The excess concentration of several chemical elements leads to air pollution.
In order to identify the types of air pollutants, a study was carried out in
the city of Lomé, the capital of Togo. The objective of this study is to achieve a better knowledge of the types of air pollutants
in the city of Lomé. The identification of the various atmospheric
pollutants linked to the sources of pollution was made using micro-sensors. The
standardized method was used to access target gas concentration levels. The
average concentrations of NO2 gaseous pollutants at landfills are on
average 0.333 μg/m3; 0.403 mg/m3 at the industrial level,
at the transport level they are on average 0.434 mg/m3 for the
morning and 0.457 mg/m3 for the evening. Concentrations of carbon
dioxide (CO2) are higher in industrial areas than in others sources of pollution. The average concentration measured at this level is 1632.79 mg/m3.
In terms of road transport, in the mornings the average concentration is
1493.23 mg/m3, in the evening the
average concentration is 1354.09 mg/m3. On the other hand, they are lower at the level of the
landfills, the average of which is 1265.08 ppm. The highest SO2 concentrations are also observed only in the landfills of Port 1 and Bè_Kpota 2 with
concentrations respectively and relatively
low and equal to 0.081 mg/m3 and 0.1616 mg/m3. The concentration of ground-level ozone is zero in industries and landfills. On the
other hand, at the level of road transport, some values were recorded at the
level of two road transports. These are
Carrefour Attikoumé Djidjole (17.03 mg/m3) and Carrefour 2
Lions (0.001 mg/m3). The concentrations of carbon monoxide (CO) in
the capital at the industrial level are on average 22.57 mg/m3; at
landfills it is on average 0.24 mg/m3. In terms of road transport,
they are on average 7.890 mg/m3 for the morning and 8.23 mg/m3 for the evening. These results constitute a database for biomonitoring.