『Abstract
This paper presents experimental data on particulate matter (PM10 and PM2.5) in the atmosphere
of Candiota - South Brazil. Samples were collected using stacked
filter units equipped with polycarbonate filters, which separate
particles into two fractions: coarse 10-2.5 μm and fine <2.5 μm.
The particulate matter was collected from January 2003 to September
2004 at three sampling sites: Acegua, 8 de Agosto, and Tres(の頭に^) Lagoas. The collected material was analyzed
for Na, Mg, Al, Si, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu,
Zn, Se, Br, Mo, Hg, and Pb, using particle-induced X-ray emission
technique. Seasonal variation of the chemical elements with the
size fraction was assessed. The elements K, Ca, Si, Ti, Fe, and
Mn showed similar seasonal variability in the fine and coarse
fractions with a low enrichment factor (<1.0) in both fractions,
except for Mn and K, indicating common sources (soil dust, fly
ash). Chemical species showing seasonal variability and high values
of enrichment factor in fine fractions may indicate an anthropogenic
origin.
Keywords: Atmospheric particulate; PIXE; PM10;
PM2.5; Meteorology』
1. Introduction
1.1. Study area
2. Methodology
2.1. Sampling
2.2. Analytical methodology
2.3. Statistical analysis
3. Results and discussion
3.1. Fine and coarse mode aerosol
3.2. Seasonal variation of chemical elements
4. Conclusions
Acknowledgements
References