Characterization and Sources of Aromatic Hydrocarbons (BTEX) in the Atmosphere of Two Urban Sites Located in Yucatan Peninsula in Mexico

Bretón, Julia Griselda Cerón y Bretón, Rosa María Cerón y Ucan, Francisco Vivas y Baeza, Cynthia Barceló y Fuentes, María de la Luz Espinosa y Lara, Evangelina Ramírez y Marrón, Marcela Rangel y Pacheco, Jorge Alfredo Montero y Guzmán, Abril Rodríguez y Chi, Martha Patricia Uc (2017) Characterization and Sources of Aromatic Hydrocarbons (BTEX) in the Atmosphere of Two Urban Sites Located in Yucatan Peninsula in Mexico. Atmosphere, 8 (12). pp. 1-23. ISSN 2073-4433

[img]
Vista previa
Texto
375.pdf - Versión Publicada
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (4MB) | Vista previa
URL o página oficial: http://doi.org/10.3390/atmos8060107

Resumen

Abstract:Benzene,toluene,ethylbenzene,p-xylene,O3,NOx,CO,PM2.5 andmeteorologicalparameters were measured in urban air of two sites in Merida, Yucatan, Mexico during 2016–2017. Samples were collected using 1.5 h time intervals at three different sampling periods before being analyzed by gas chromatographywithflameionizationdetection. ThehighestconcentrationsofBTEXoccurredduring midday and afternoon in spring and summer seasons. Mean concentrations of, BTEX for the Cholul and SEDUMA sites, respectively, were 40.91 µg/m3 and 32.86 µg/m3 for benzene; 6.87 µg/m3 and 3.29 µg/m3 for toluene; 13.87 µg/m3 and 8.29 µg/m3 for p-xylene; and 6.23 µg/m3 and 4.48 µg/m3 for ethylbenzene. The toluene/benzene and xylene/ethylbenzene concentration ratios indicated that BTEX levels at both sites were influenced by local and fresh emissions (vehicular traffic). Bivariate and multivariate analyses were performed in order to correlate BTEX concentrations with criteria air pollutants to infer their possible sources. Health risk assessment revealed that exposure to benzene exceeded the recommended value for the integrated lifetime cancer risk. These results suggest that Merida’s population is exposed to cancer risk, and changes in the existing environmental policies should therefore be applied to improve air quality. Keywords: volatile organic compounds; BTEX; tropospheric ozone; Merida; air pollution

Tipo de elemento: Article
Divisiones: Ciencias Químicas
Usuario depositante: Editor Repositorio
Creadores:
CreadorEmailORCID
Bretón, Julia Griselda CerónNO ESPECIFICADONO ESPECIFICADO
Bretón, Rosa María CerónNO ESPECIFICADONO ESPECIFICADO
Ucan, Francisco VivasNO ESPECIFICADONO ESPECIFICADO
Baeza, Cynthia BarcelóNO ESPECIFICADONO ESPECIFICADO
Fuentes, María de la Luz EspinosaNO ESPECIFICADONO ESPECIFICADO
Lara, Evangelina RamírezNO ESPECIFICADONO ESPECIFICADO
Marrón, Marcela RangelNO ESPECIFICADONO ESPECIFICADO
Pacheco, Jorge Alfredo MonteroNO ESPECIFICADONO ESPECIFICADO
Guzmán, Abril RodríguezNO ESPECIFICADONO ESPECIFICADO
Chi, Martha Patricia UcNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 24 Abr 2020 19:09
Última modificación: 24 Abr 2020 19:09
URI: http://eprints.uanl.mx/id/eprint/17589

Actions (login required)

Ver elemento Ver elemento

Downloads

Downloads per month over past year