| Título: | Association between light absorption measurements of PM2.5 and distance from heavy traffic roads in the Mexico City metropolitan area |
| Autores: |
Cortez-Lugo,Marlene Escamilla-Núñez,Consuelo Barraza-Villarreal,Albino Texcalac-Sangrador,José Luis Chow,Judith Watson,John Hernández-Cadena,Leticia Romieu,Isabelle |
| Fecha: | 2013-04-01 |
| Publicador: | SCIELO |
| Fuente: |
 |
| Tipo: | journal article |
| Tema: |
Carbon vehicle emissions roads diesel exhaust Mexico |
| Descripción: | OBJECTIVE: To study the relationship between light absorption measurements of PM2.5 at various distances from heavy traffic roads and diesel vehicle counts in Mexico City. MATERIALS AND METHODS: PM2.5 samples were obtained from June 2003-June 2005 in three MCMA regions. Light absorption (b abs) in a subset of PM2.5 samples was determined. We evaluated the effect of distance and diesel vehicle counts to heavy traffic roads on PM2.5 b abs using generalized estimating equation models. RESULTS: Median PM2.5 b abs measurements significantly decrease as distance from heavy traffic roads increases (p<0.002); levels decreased by 7% (CI95% 0.9-14) for each 100 additional meters from heavy traffic roads. Our model predicts that PM2.5 b abs measurements would increase by 20% (CI95% 3-38) as the hourly heavy diesel vehicle count increases by 150 per hour. CONCLUSION: PM2.5 b abs measurements are significantly associated with distance from motorways and traffic density and therefore can be used to assess human exposure to traffic-related emissions. |
| Idioma: | Inglés |
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