Association between light absorption measurements of PM2.5 and distance from heavy traffic roads in the Mexico City metropolitan area
Document title: Association between light absorption measurements of PM2.5 and distance from heavy traffic roads in the Mexico City metropolitan area
Journal: Salud pública de México
Database: PERIÓDICA
System number: 000360959
ISSN: 0036-3634
Authors: 1
1
1
1
2
2
1
1
Institutions: 1Instituto Nacional de Salud Pública, Centro de Investigación en Salud Poblacional, Cuernavaca, Morelos. México
2Desert Research Institute, Reno, Nevada. Estados Unidos de América
Year:
Season: Mar-Abr
Volumen: 55
Number: 2
Pages: 155-161
Country: México
Language: Inglés
Document type: Artículo
Approach: Aplicado, analítico
Spanish abstract OBJETIVO: Evaluar la relación entre las mediciones de absorción de luz de las PM2.5 a diferentes distancias de vías de tráfico y el aforo vehicular de diesel en la Ciudad de México. MATERIAL Y MÉTODOS: Se realizaron mediciones de PM2.5 y su análisis de babs en tres zonas de la Ciudad de México. Se usaron modelos GEE para evaluar el efecto de la distancia y el aforo vehicular de tráfico pesado sobre PM2.5 babs. RESULTADOS: Se observó una tendencia decreciente en la mediana de PM2.5 babs conforme se incrementó la distancia a las avenidas de alto tráfico (p<0.002); los niveles decrecen en 7% (CI95% 0.9-14) por cada 100 metros de incremento. Las mediciones de PM2.5 babs se incrementan en 20% (CI95% 3-38) cuando el aforo vehicular a diesel es mayor de 150 en una hora. CONCLUSIONES: Las mediciones de PM2.5 babs están significativamente asociadas con la distancia de avenidas con alto tránsito vehicular y con vehículos de diesel
English abstract 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 (babs) 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 babs using generalized estimating equation models. RESULTS: Median PM2.5 babs 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 babs measurements would increase by 20% (CI95% 3-38) as the hourly heavy diesel vehicle count increases by 150 per hour. CONCLUSION: PM2.5 babs measurements are significantly associated with distance from motorways and traffic density and therefore can be used to assess human exposure to traffic-related emissions
Disciplines: Medicina
Keyword: Salud pública,
Emisiones,
Carbono,
Vehículos,
Diesel,
Avenidas,
Ciudad de México,
Contaminación ambiental
Keyword: Medicine,
Public health,
Emissions,
Carbon,
Vehicles,
Roads,
Mexico City,
Environmental pollution
Full text: Texto completo (Ver HTML)