Evaluation of Aldehydes Concentration in the Air of Monteverde Biological Reserve and Heredia City, Costa Rica
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| Autores: | , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2016 |
| Descripción: | Six kinds of aldehydes in air samples were found during April-June 2015 in Monteverde Biological Reserve (RBM) and in Heredia city, Costa Rica. Formaldehyde, acetaldehyde, propanal, butanal, hexanal, and heptanal were trapped by means of adsorption cartridges coated with a solution of 2,4-dinitrophenylhydrazine (2,4-DNFH) and analyzed using HPLC with an ultraviolet/visible detector. Average concentrations of each aldehyde in Heredia were between 12.78 ug/m3 and 72.57 ug/m3 during the dry season vs 7.95 ug/m3 and 62.30 ug/m3 during the transition to the rainy season; while in the RBM were measured concentrations between 1.93 ug/m3 and 22.62 ug/m3 during the dry season and between 0.26 mg/m3 and 4.68 ug/m3 during the transition to the rainy season. The total concentration of carbonyls in Heredia was 241.08 ug/m3 in the dry season vs 172.95 ug/m3 during the transition to the rainy season, due to the pollutants dilution effect of the rain and a higher photochemical activity in the dry season than in the transition to the rainy season. The total concentration of carbonyls in RBM was 42.07 ug/m3 in the dry season and 13.47 ug/m3 during the transition to the rainy season. |
| País: | Portal de Revistas UNA |
| Institución: | Universidad Nacional de Costa Rica |
| Repositorio: | Portal de Revistas UNA |
| Lenguaje: | Español |
| OAI Identifier: | oai:ojs.www.una.ac.cr:article/8649 |
| Acceso en línea: | https://www.revistas.una.ac.cr/index.php/ambientales/article/view/8649 |
| Palabra clave: | 2 4-DNFH aire ambiental HPLC zona boscosa zona urbana ambient air forest area urban area |