Understanding the Nature of Wet Air Deposition on Rooftops in Uyo Metropolis

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A.P., Ihom; D.K., Uko; I.E., Markson; O.C., Eleghasim

Understanding the Nature of Wet Air Deposition on Rooftops in Uyo Metropolis Journal Article

Mechanics, Materials Science & Engineering, 12 , 2017, ISSN: 2412-5954.

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Authors: Ihom A.P., Uko D.K., Markson I.E., Eleghasim O.C.

ABSTRACT. The work titled Understanding the Nature of Wet Air Deposition on Rooftops in Uyo Metropolis was Carried out by determining the extent of air pollution in four different places in Uyo metropolis. Attair 5X was used to determine the gaseous pollutants in the wet air, while filtration technique using High Volume Sampler was used to determine the suspended particulates in the air, and the concentration was calculated in mg/l over a 24hrs period. The composition of the deposition on the rooftops was analysed using EDX-X-Ray Fluorescence (EDX-XRF) and the characterization of the deposit was done using Scanning Electron Microscope (SEM). The result of the work showed that gas pollutants existed in all the four stations but were not to the level of health concern since air quality standard specifications were not exceeded. However, impact on rooftop was noted since SO3 was in the composition of the deposit on the rooftops. The suspended particulate matter exceeded air quality standard value of 200 µg/m3 in all the four stations, and so was of both health and environmental concern since it influenced the deposition on the rooftops. The SPM composition elements were also found in the composition of the deposits on the rooftops. SEM characterized the dark-black deposit on the rooftop and the micrograph showed areas of high and low deposition on the roofs. The study concluded that a better understanding of the nature of wet air deposition on rooftops in Uyo metropolis has now been established.

Keywords: wet air, nature, pollutants, particulates, deposition, rooftops, Uyo metropolis

DOI 10.2412/mmse.34.45.452

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