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Recognition of the importance of geogenic sources in the content of metals in PM2.5 collected in the Mexico City Metropolitan Area.
Morton-Bermea, Ofelia; Garza-Galindo, Rodrigo; Hernández-Álvarez, Elizabeth; Amador-Muñoz, Omar; Garcia-Arreola, Maria Elena; Ordoñez-Godínez, Sara L; Beramendi-Orosco, Laura; Santos-Medina, Graciela L; Miranda, Javier; Rosas-Pérez, Irma.
Afiliação
  • Morton-Bermea O; Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510, Cd. México, Mexico. omorton@geofisica.unam.mx.
  • Garza-Galindo R; Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510, Cd. México, Mexico.
  • Hernández-Álvarez E; Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510, Cd. México, Mexico.
  • Amador-Muñoz O; Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, 04510, Cd. de México, Mexico.
  • Garcia-Arreola ME; Instituto de Geología, Universidad Autónoma de San Luis Potosí, 78240, San Luis Potosí SLP, Mexico.
  • Ordoñez-Godínez SL; Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510, Cd. México, Mexico.
  • Beramendi-Orosco L; Instituto de Geología, Universidad Nacional Autónoma de México, 04510, Cd. de México, Mexico.
  • Santos-Medina GL; Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510, Cd. México, Mexico.
  • Miranda J; Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, 04510, Cd. de México, Mexico.
  • Rosas-Pérez I; Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, 04510, Cd. de México, Mexico.
Environ Monit Assess ; 190(2): 83, 2018 Jan 17.
Article em En | MEDLINE | ID: mdl-29344732
The study of airborne metals in urban areas is relevant due to their toxic effects on human health and organisms. In this study, we analyzed metals including rare earth elements (REE) in particles smaller than 2.5 µm (PM2.5), collected at five sites around the Mexico City Metropolitan Area (MCMA), during three periods in 2011: April (dry-warm season, DW), August (rainy season, R), and November (dry-cold season, DC). Principal component analysis allowed identifying factors related to geogenic sources and factors related to anthropogenic sources. The recognition of the high impact of geogenic sources in PM2.5 is in agreement with the REE distribution patterns, which show similar behavior as those shown by igneous rocks, confirming the influence of the regional geogenic material. Metals associated to geogenic sources showed higher concentration (p < 0.05) at NE of the MCMA and a significant correlation with prevalent winds. Geogenic metals show similar seasonal distribution, with the highest concentration during DW (p < 0.05), suggesting a possible metal resuspension effect which affects more significantly at lower relative humidity (RH). The metals associated with anthropogenic sources are in agreement with the urban complexity of the area, showing homogenous distribution throughout MCMA (p > 0.05) and no similar seasonal pattern among them. These unexpected results exposed outstanding information regarding the identification of different geogenic sources as the main contributors of metals in the atmospheric environment in the MCMA and highlighted the importance of meteorology in the spatial and seasonal metal patterns.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monitoramento Ambiental / Poluentes Atmosféricos / Material Particulado / Metais Tipo de estudo: Prognostic_studies Limite: Humans País/Região como assunto: Mexico Idioma: En Revista: Environ Monit Assess Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2018 Tipo de documento: Article País de afiliação: México País de publicação: Holanda
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monitoramento Ambiental / Poluentes Atmosféricos / Material Particulado / Metais Tipo de estudo: Prognostic_studies Limite: Humans País/Região como assunto: Mexico Idioma: En Revista: Environ Monit Assess Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2018 Tipo de documento: Article País de afiliação: México País de publicação: Holanda