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BioMed Research International
Volume 2013, Article ID 521728, 13 pages
Research Article

Air Pollutant Characterization in Tula Industrial Corridor, Central Mexico, during the MILAGRO Study

Investigación y Posgrado, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Núm 152 Colonia San Bartolo Atepehuacan, Delegación Gustavo A. Madero, 07730 México, DF, Mexico

Received 4 September 2012; Revised 22 November 2012; Accepted 6 December 2012

Academic Editor: Ernesto Alfaro-Moreno

Copyright © 2013 G. Sosa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Pollutant emissions and their contribution to local and regional air quality at the industrial area of Tula were studied during a four-week period as part of the MILAGRO initiative. A recurrent shallow stable layer was observed in the morning favoring air pollutants accumulation in the lower 100 m atmospheric layer. In the afternoon the mixing layer height reached 3000 m, along with a featuring low level jet which was responsible of transporting air pollutants at regional scales. Average PM10 at Jasso (JAS) and Tepeji (TEP) was 75.1 and 36.8 μg/m3, respectively while average PM2.5 was 31.0 and 25.7 μg/m3. JAS was highly impacted by local limestone dust, while TEP was a receptor of major sources of combustion emissions with 70% of the PM10 constituted by PM2.5. Average hourly aerosol light absorption was 22 Mm−1, while aerosol scattering (76 Mm−1) was higher compared to a rural site but much lower than at Mexico City. C values in the epiphyte Tillandsia recurvata show that the emission plume directly affects the SW sector of Mezquital Valley and is then constrained by a mountain range preventing its dispersion. Air pollutants may exacerbate acute and chronic adverse health effects in this region.