Adsorption Of Organic Matter By Inorganic
Particulate In Air Pollution
Author(s)
V. Villas-Boas, L. Moratelli, I. Nascimento, R. M. Dallago,
R. Dellanora, A. L. Loureiro, P. Artaxo, E. Ribeiro Lovatel,
N. C. Vieceli & E. Müller Cardoso
Abstract
The main objective of this work was the semi-quantitative evaluation of the
influence of the concentrations of fine and coarse particulate matter (PM2.5 and
PM10) and black carbon (BC) on the organic compound concentrations in the
atmosphere of Caxias do Sul, a city in Rio Grande do Sul, the southernmost state
of Brazil. The collection of the samples was carried out between August of 2007
and January of 2008. The periodic replacement of the cartridges and sampling
filters was performed every other day (48 h sampling). An active sampler was
used for the collection of the inorganic particulate matter, that means, PM2.5 and
PM10 were sampled using stacked filter units that collect fine (d < 2.5 μm) and
coarse (2.5 μm < d < 10 μm) particulate matter. The organic material was
collected by a previously treated cotton cartridge. Both samplings (inorganic and
organic matter) were performed at the same time and sampling point, with
division of the air flux. The air was forced to pass through the two samplers by a
vacuum pump. The inorganic particulate matter was characterized by gravimetry
and reflectance. The tentative identification of the organic compounds was
obtained by gas chromatography with mass spectrometry detection (GC-MS).
The preliminary results suggest an inverse relation among the PM10
concentration and the amounts of some organic compounds like 1H-indene,
neridol and diethyl hexylphthalate. On the other hand, the maximum quantity of
eburnamonine was detected at the same time as the maximum concentrations of
Keywords
air pollution, organic matter, particulate, GC/FID
Related Book
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