Sampling Of PM2.5 Respirable Particles In The
Northwest Of The Metropolitan Zone Of
Mexico City During 2006
Author(s)
Y. I. Falcon, L. Nuño, J. P. Becerril & L. Cortes
Abstract
The Metropolitan Zone of Mexico City is one of the most polluted areas in the
world. PM2.5 respirable particles are a health risk for the population. They can
induce chemical reactions in the atmosphere, increasing the possibility of acid
rain formation and they are a factor for reducing visibility. They could also
reduce solar radiation, thus increasing the changes in the environmental
temperature and altering biological rates of plant growth. The sampling site was
located at the facilities of the Metropolitan University Campus Azcapotzalco.
This site is located Northwest of Mexico City, and it is a zone with urban and
industrial developments. Sampling of PM2.5 respirable particles was done using a
Minivol Portable Sampler Airmetrics and the mass of particles was determined
by gravimetry. Particles samples were collected for 24 hours from Monday to
Tuesday and from Thursday to Friday, for 11 months from January to November
2006. A total of 36 samples were collected. The particles mass data were
correlated with the wind velocity for the sampling days. The average
concentration of PM2.5 was 27.93 µg/m3 with a wind velocity of 5.17 m/s. There
are two maximum values for PM2.5 that coincide with the values of minimum
wind velocity during the monitoring period: for the sample of February 9th there
was a PM2.5 concentration of 43.12µg/m3 with a wind velocity of 3.76 m/s. For
November 16th there was a PM2.5 concentration of 49.17 µg/m3 and a wind
velocity of 3.62 m/s. The minimum concentration obtained on February 23rd was
13.29 µg/m3 with a wind velocity of 4.95 m/s, and for June 1st the concentration
Keywords
air pollution, respirable particles
Related Book
Other papers in this volume
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