Determination of carbonyls and their sources in three sites of the metropolitan area of Costa Rica, Central America
Ambient levels of carbonyl compounds and their possible sources were studied at three places in the metropolitan area of Costa Rica, including a residential, an industrial, and a commercial downtown area with high vehicular flow, during the periods of April–May and September–December 2009. Fifteen c...
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| Veröffentlicht in: | Environmental monitoring and assessment 2012, Vol.184 (1), p.53-61 |
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| creator | Murillo, Jorge Herrera Marín, José Félix Rojas Román, Susana Rodríguez |
| description | Ambient levels of carbonyl compounds and their possible sources were studied at three places in the metropolitan area of Costa Rica, including a residential, an industrial, and a commercial downtown area with high vehicular flow, during the periods of April–May and September–December 2009. Fifteen carbonyl compounds were identified in the ambient air, of which acetone was the most abundant carbonyl, followed by formaldehyde and acetaldehyde. Concentrations were highest in rainy season at all sites and lower in dry season. These decreases in concentration are explained by the influences of both photochemical reactions and local meteorological conditions. The strong correlation between C1–C2 and C3 indicated a common origin for these carbonyls. The C1/C2 ratios varied between 0.49 to 1.05, values which can be considered typical of an urban area. |
| doi_str_mv | 10.1007/s10661-011-1946-5 |
| format | Article |
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Fifteen carbonyl compounds were identified in the ambient air, of which acetone was the most abundant carbonyl, followed by formaldehyde and acetaldehyde. Concentrations were highest in rainy season at all sites and lower in dry season. These decreases in concentration are explained by the influences of both photochemical reactions and local meteorological conditions. The strong correlation between C1–C2 and C3 indicated a common origin for these carbonyls. 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Fifteen carbonyl compounds were identified in the ambient air, of which acetone was the most abundant carbonyl, followed by formaldehyde and acetaldehyde. Concentrations were highest in rainy season at all sites and lower in dry season. These decreases in concentration are explained by the influences of both photochemical reactions and local meteorological conditions. The strong correlation between C1–C2 and C3 indicated a common origin for these carbonyls. 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| subjects | Air pollution Atmospheric Protection/Air Quality Control/Air Pollution Carbonyl compounds Cities Costa Rica Dry season Earth and Environmental Science Ecology Ecotoxicology Environment Environmental Management Environmental monitoring Environmental Monitoring - methods Environmental Pollutants - chemistry Environmental testing Metropolitan areas Monitoring/Environmental Analysis Organic Chemicals - chemistry Outdoor air quality Oxidation Ozone Photochemical reactions Photochemicals Rainy season Seasons Signal to noise ratio Studies Urban areas VOCs Volatile organic compounds |
| title | Determination of carbonyls and their sources in three sites of the metropolitan area of Costa Rica, Central America |
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