The Malaysian Journal of Analytical Sciences
Vol 12 No 2 (2008): 432 – 443
S. Mariam
Sumari1*, Rusdin Laiman1, Nesamalar
Kantasamy1, Siniarovina ak Urban Sinyaw2
1 Faculty of
Applied Sciences, UiTM, Shah Alam,
Selangor
2 The Malaysian Meteorological Department,Petaling Jaya, Selangor.
*Corresponding
author: sitim007@salam.uitm.edu.my
Abstract
Air
samples were collected from 2004 to 2005 using four-staged filter packs at an
urban site Petaling Jaya (PJ) and a rural-agricultural site
Tanah Rata (TR). The samples were analysed for reactive gases consisting of NH3, HNO3, HCl and SO2 while the aerosol components were analysed for SO42– , NO3- , Cl-, Na+,
K+, Ca2+, Mg2+ and NH4+. For both PJ and TR, analysis indicates
the dry deposition was dominated by the gaseous components. They
range from about 78% to 87% of total compositions for urban PJ and 59% to 63%
for rural TR. .Among the four reactive
gases, NH3
is the most dominating component at both sites. Elevated NH3
concentration in TR was mainly attributed to the use of nitrogenous fertilizer.
For PJ high NH3 could be due to local air pollution created by
industries as well as agricultural
activities. The acidic species
associated with SOx and NOx are typically more abundant at PJ than TR.
Their presence, and for most other
chemical species, show similar increasing trend, and this reflect the growing
use of fossil fuels associated with
urbanization and industrialization, especially for PJ.
Keywords: Four-staged filter packs, reactive gases, aerosols, nitrogenous
fertilizer
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