Carbonaceous Aerosols in Fine Particulate Matter of Santiago Metropolitan Area, ChileReport as inadecuate




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Resumen

Measurements of carbonaceous aerosols in South American cities are limited, and most existing data are of short term and limitedto only a few locations. For 6 years 2002–2007, concentrations of fine particulate matter and organic and elemental carbon weremeasured continuously in the capital of Chile. The contribution of carbonaceous aerosols to the primary and secondary fractionswas estimated at three different sampling sites and in the warm and cool seasons.The results demonstrate that there are significantdifferences in the levels in both the cold March to August and warm September to February seasons at all sites studied. Thepercent contribution of total carbonaceous aerosol fine particulate matter was greater in the cool season 53 ± 41% than in thewarm season 44 ± 18%. On average, the secondary organic carbon in the city corresponded to 29% of the total organic carbon.In cold periods, this proportion may reach an average of 38%. A comparison of the results with the air quality standards for fineparticulate matter indicates that the total carbonaceous fraction alone exceeds theWorld Health Organization standard 10 𝜇g-m3and the United States Environmental Protection Agency standard 15 𝜇g-m3 for fine particulate matter.Nota general

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Author: Leiva Guzmán, Manuel; - Toro Araya, Richard; - Flocchini, Robert; - Morales Segura, Raúl Gerardo; -

Source: http://repositorio.uchile.cl/



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