Page 140 - LAS CIENCIAS AMBIENTALES EN EL ANTROPOCENO - DIGITAL(1)

SUMMARY

exico City has presented northern zone and 22.1% in the south. Vega, E.; Ruiz, H.; Escalona, S.;
environmental contingencies, The enrichment factor of the trace Cervantes, A.; Lopez–Veneroni,
Mwith PM2.5 being one of the elements (Na, P, S, Cl, K, V, Cr, Mn, Ni, Cu, D.; Gonzalez–Avalos, E.; Sanchez–
pollutants that presents a public health Zn and Pb) presented values >10, which Reyna, G. (2011). Chemical
problem. The maximum permissible limit suggests that they come mainly from composition of fine particles in
established in the Mexican standard anthropogenic sources. The knowledge Mexico City during 2003–2004.
(NOM-025-SSA1-2014) is frequently of the chemical composition will allow to Atmospheric Pollution Research,
exceeded, with a 24-hour average have an approximation of the emission 2(4), 477-483. doi: 10.5094/
value of 45µg/m3. This study presents sources, to identify the seasonal apr.2011.054
the results of environmental samples variability of the particle composition Vega, E.; Lowenthal, D.; Ruiz, H.;
of PM2.5 at two sites in Mexico City, and to evaluate the strategies for its Reyes, E.; Watson, J.G.; Chow,
the Environmental Analysis Laboratory control. J.C.; …; Alastuey, A. (2009). Fine
(LAA) located to the north and the particle receptor modeling in the
Atmospheric Sciences Center (CCA) atmosphere of Mexico City. Journal
were collected during the rainy season REFERENCIAS of the Air & Waste Management
located south of the city. The samples
Association, 59(12), 1417-1428.
(July to September) of 2019. In the Vega Rangel, E.; Martínez Villa,
PM2.5 samples, the composition of ions Chow, J.C.; Watson, J.G. (2017). G. (2004). Estudio integral de
was determined by ion chromatography, Enhanced Ion Chromatographic partículas atmosféricas en
organic and elemental carbon by Speciation of Water-Soluble la Ciudad de México. México:
thermo-optical reflectance and trace PM $$ _ {2.5} $$2.5 to Improve Instituto Mexicano del Petróleo.
elements by ray fluorescence X (XRF). Aerosol Source Apportionment. Wang, Y.; Tang, G.; Zhao, W.; Yang,
The results showed that the average Aerosol Science and Engineering, Y.; Wang, L.; Liu, Z., ...; Wang, Y.
concentration of PM2.5 was lower than 1(1), 7-24. (2020). Different roles of nitrate
that established in the standard in both Li, Y.; Chang, M.; Ding, S.; Wang, S.; Ni, and sulfate in air pollution
sites and the highest concentrations D.; Hu, H. (2017). Monitoring and episodes in the North China Plain.
were found in the northern zone with source apportionment of trace Atmospheric Environment, 224,
a value of 15 ± 6µg/m3. Secondary elements in PM2.5: Implications 117325.Warner, K., & Wark, C.
aerosols (NO3-, SO4 = and NH4 +) were for local air quality management. (2014). “Contaminación del aire:
the main component of PM2.5, with a Journal of environmental Origen y control” México. Limusa.
contribution of 57% in the southern management, 196, 16-25. pp. 18-38.
zone and 36% in the south. The above, McMurry, P.H.; Shepherd, M.F.; Vickery,
due to the presence of precursors (NOx, J.S. (Eds.). (2004). Particulate
SO2 and NH3) from the north that react matter science for policy makers: A
photochemically in the atmosphere and NARSTO assessment. Cambridge
are transported to the south. Organic University Press.
carbon (OC) showed an average
concentration of 7.8µgC/m3 (36%
north) and 4.8µgC/m3 (22.1% south).
Secondary organic carbon represented
17.5% of the mass of PM2.5 in the

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