Atmospheric PM2.5 Mercury in the Metropolitan Area of Mexico City |
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Authors: | Ofelia Morton-Bermea Rodrigo Garza-Galindo Elizabeth Hernández-Álvarez Sara L. Ordoñez-Godínez Omar Amador-Muñoz Laura Beramendi-Orosco Javier Miranda Irma Rosas-Pérez |
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Affiliation: | 1.Instituto de Geofísica,Universidad Nacional Autónoma de México,Mexico,Mexico;2.Posgrado en Ciencias de la Tierra,Universidad Nacional Autónoma de México,Cd. de México,Mexico;3.Centro de Ciencias de la Atmósfera,Universidad Nacional Autónoma de México,Cd. de México,Mexico;4.Instituto de Geología,Universidad Nacional Autónoma de México,Mexico,Mexico |
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Abstract: | In this study, atmospheric mercury concentration in airborne particulate matter with an aerodynamic diameter ≤?2.5 µm (PM2.5) was analyzed by ICP-MS. Samples were collected in the Mexico City Metropolitan Area (MCMA), during 2013, in five locations, Northwest, Northeast (NE), Central, Southwest and Southeast, along three seasons: dry warm, rainy, and dry cold (DC). It can be observed that NE shows the highest mercury concentration (p?0.05), where pollution events were identified. The seasonal distribution shows that samples collected during DC present the highest concentration (p?0.05). These results are in agreement with the distribution of important mercury industrial sources located in the northern urban area as well with the temperature and wind conditions during 2013. The comparison of data obtained in this work with those of similar previous studies clearly indicates a decrease, between 2006 and 2013, of mercury content in PM2.5 collected in MCMA. |
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