Ambient Suspended Particulates and Volatile Organic Carbon in a Fast
Developing Metropolis in the Niger Delta, Nigeria
Emerhi, E.A., Ideriah,
T.J.K. and Trinya, W.
Forestry and Wildlife, Delta State University, Abraka, Delta State,
Nigeria. [email protected]
Pollution Studies, Rivers State University of Science and Technology,
Port Harcourt, Rivers State, Nigeria. [email protected]
Forestry and Environment, Rivers State University of Science and Tech.,
Port Harcourt Rivers State, Nigeria.
Academic Editor: Dr.
The concentrations of
various sizes of suspended particulates and volatile organic carbons
along selected roadsides and control sites in the fast developing city
of Port Harcourt in the Niger Delta were determined at 0m and 50m from
roads during the dry and rainy seasons. The parameters were determined
using portable hand held air monitors which include an Industrial
Scientific Corporation ITX Multi Gas Monitor and Aerosol Mass Monitor by
Met One Instrument INC. The results showed highest concentrations of PM1
(0.004mg/m3), PM2.5 (0.19 mg/m3),
PM7 (0.715 mg/m3), PM10 (0.829 mg/m3),
TSP (0.946 mg/m3) and VOC (4.2ppm) in the dry season and PM1
(0.004mg/m3), PM2.5 (0.28 mg/m3),
PM7 (0.226 mg/m3), PM10 (0.109 mg/m3),
TSP (0.129 mg/m3) and VOC (1.2ppm) in the rainy season. The
differences between the dry and rainy season values were significant at
P≥0.05. The concentrations of the pollutants measured at the high
density areas were generally higher than the concentrations measured at
low density areas; however PM1, PM2.5, PM10
and VOC showed significant differences with traffic density at P≥0.05.
There was no significant difference between the mean concentrations
measured at 0m and 50m. The results showed very strong relationship
between PM10 and TSP in both season, PM7 and TSP
in the dry season as well as PM1 with PM2.5 and PM7
in the rainy season implying similarity in sources of the particulates.
The pollutants in the study area do not originate from the same sources
as the correlations between PM2.5 and other fractions as well
as between the suspended particulates and VOC were very low with
decreasing mean r = 0.2174PM1, 0.2052 PM2.5,
0.0591 PM7, 0.0386 PM10 and 0.0209 TSP. The levels
of VOC call for serious environmental concern as their concentrations at
the high density stations exceeded permissible limit recommended by the
Federal Environmental Protection Agency of Nigeria and United States.
The levels of the pollutants were influenced by traffic density,
seasonal variations and distances from major roads, therefore farming
activities and consumption of exposed foodstuffs should be discouraged
in the study areas.
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