Atmospheric levels of Benzene and C1-C2 Carbonyls in San Nicolas de los Garza, Nuevo Leon, mexico: Source implications and health risk
Por:
Cerón Bretón J.G., Cerón Bretón R.M., Kahl J.D.W., Lara-Severino R.D.C., Ramírez Lara E., Espinosa Fuentes M.D.L.L., Rangel Marrón M., Uc Chi M.P.
Publicada:
1 ene 2017
Resumen:
Atmospheric benzene and carbonyls were studied in San Nicolas de los Garza, Nuevo Leon, during 2011 and 2012. The relative abundance for measured VOCs was the following: formaldehyde (9.06 µg m-3) > acetaldehyde (8.06 µg m-3) > benzene (0.65 µg m-3). All measured VOCs had a clear seasonal trend with higher values of concentration during summer. Benzene and formaldehyde had a marked diurnal trend with the highest levels during morning, whereas acetaldehyde did not show a clear diurnal pattern. Meteorological analysis showed that the dominant winds came from NNE and ENE, suggesting that sources located in these directions contribute to the VOC levels. Principal component analysis (PCA) analysis revealed that photochemical activity influenced benzene and carbonyl levels during summer and that benzene was associated with vehicular traffic emissions during autumn and winter, showing good correlation with CO. Meteorological data showed that measured VOCs were influenced by regional sources. A health risk assessment showed that local exposure to carbonyls and benzene exceeded 1×10-6 for integrated lifetime cancer risk. People living in San Nicolas de los Garza, thus, have a probable risk of suffering cancer in their lifetime. It is, therefore, necessary to improve environmental policies for controlling VOC levels in this area. © 2017 by the authors.
Filiaciones:
Cerón Bretón J.G.:
Facultad de Química, Universidad Autónoma del Carmen (UNACAR), Calle 56 Núm. 4 Esq. Ave. Concordia, Col, Benito Juárez, Ciudad del Carmen C.P., Campeche, Mexico
Cerón Bretón R.M.:
Facultad de Química, Universidad Autónoma del Carmen (UNACAR), Calle 56 Núm. 4 Esq. Ave. Concordia, Col, Benito Juárez, Ciudad del Carmen C.P., Campeche, Mexico
Kahl J.D.W.:
Atmospheric Science Group, Department of Mathematical Sciences, University ofWisconsin-Milwaukee, 2200 E. Kenwood Blvd, Milwaukee, WI, United States
Lara-Severino R.D.C.:
Facultad de Ciencias de la Salud, Universidad Autónoma del Carmen (UNACAR), Av. Edzná s/n. Esq. Fracc, Mundo Maya, Ciudad del Carmen C.P, Campeche, Mexico
Ramírez Lara E.:
Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León (UANL), Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza, Nuevo León C.P, Mexico
Espinosa Fuentes M.D.L.L.:
Instituto Nacional de Ecología, Periférico 5000, Col. Insurgentes Cuicuilco, Delegación Coyoacán C.P, Mexico
Rangel Marrón M.:
Facultad de Química, Universidad Autónoma del Carmen (UNACAR), Calle 56 Núm. 4 Esq. Ave. Concordia, Col, Benito Juárez, Ciudad del Carmen C.P., Campeche, Mexico
Uc Chi M.P.:
Facultad de Química, Universidad Autónoma del Carmen (UNACAR), Calle 56 Núm. 4 Esq. Ave. Concordia, Col, Benito Juárez, Ciudad del Carmen C.P., Campeche, Mexico
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