Binational school-based monitoring of traffic-related air pollutants in El Paso, Texas (USA) and Ciudad Juárez, Chihuahua (México)

Raysoni, Amit U.; Sarnat, Jeremy A.; Sarnat, Stefanie Ebelt; Garcia, Jośe Humberto; Holguín, Fernando; Luèvano, Silvia Flores; Li, Wen-Whai

doi:10.1016/j.envpol.2011.06.024

Cited by 61 publications

(31 citation statements)

References 48 publications

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“…Table 2 presents descriptive statistics for the exposure metrics of a priori interest in the epidemiologic analyses [i.e., 48-hr (Wednesday–Friday) PM and O 3 concentrations and 96-hr (Monday–Friday) NO 2 concentrations] for all sampling sites. Full results describing the air quality data set collected are provided elsewhere (Raysoni et al 2011). Pollutant concentrations varied spatially across the outdoor school and CAMS sites, with higher mean values and standard deviations observed for all pollutants (except O 3 ) in CJ than in EP.…”

Section: Resultsmentioning

confidence: 99%

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Air Pollution and Acute Respiratory Response in a Panel of Asthmatic Children along the U.S.–Mexico Border

Sarnat

Raysoni

et al. 2012

Environ Health Perspect

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Background: Concerns regarding the health impact of urban air pollution on asthmatic children are pronounced along the U.S.–Mexico border because of rapid population growth near busy border highways and roads.Objectives: We conducted the first binational study of the impacts of air pollution on asthmatic children in Ciudad Juarez, Mexico, and El Paso, Texas, USA, and compared different exposure metrics to assess acute respiratory response.Methods: We recruited 58 asthmatic children from two schools in Ciudad Juarez and two schools in El Paso. A marker of airway inflammation [exhaled nitric oxide (eNO)], respiratory symptom surveys, and pollutant measurements (indoor and outdoor 48-hr size-fractionated particulate matter, 48-hr black carbon, and 96-hr nitrogen dioxide) were collected at each school for 16 weeks. We examined associations between the pollutants and respiratory response using generalized linear mixed models.Results: We observed small but consistent associations between eNO and numerous pollutant metrics, with estimated increases in eNO ranging from 1% to 3% per interquartile range increase in pollutant concentrations. Effect estimates from models using school-based concentrations were generally stronger than corresponding estimates based on concentrations from ambient air monitors. Both traffic-related and non–traffic-related particles were typically more robust predictors of eNO than was nitrogen dioxide, for which associations were highly sensitive to model specification. Associations differed significantly across the four school-based cohorts, consistent with heterogeneity in pollutant concentrations and cohort characteristics. Models examining respiratory symptoms were consistent with the null.Conclusions: The results indicate adverse effects of air pollution on the subclinical respiratory health of asthmatic children in this region and provide preliminary support for the use of air pollution monitors close to schools to track exposure and potential health risk in this population.

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Section: Resultsmentioning

confidence: 99%

“…A complete description of the sampling methods and protocol can be found elsewhere (Raysoni et al 2011). Briefly, PM 10–2.5 and PM 2.5 mass was collected using Harvard cascade impactors (Demokritou et al 2002) and quantified via gravimetric analysis.…”

Section: Methodsmentioning

confidence: 99%

Air Pollution and Acute Respiratory Response in a Panel of Asthmatic Children along the U.S.–Mexico Border

Sarnat

Raysoni

et al. 2012

Environ Health Perspect

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“…Only some of these reports have, however, dealt with indoor air quality in offices located in mechanically ventilated buildings [1,3,4,[11][12][13][14]. Given the increased use of forced ventilation in of the relationship between PM exposure and health effects.…”

Section: Introductionmentioning

confidence: 99%

“…In the past decade, the number of chemical studies aiming at understanding the adverse effects of exposure to atmospheric particulate matter (PM) with an aerodynamic diameter smaller than 2.5 μm (PM 2.5 ) on human health at workplaces has increased substantially [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], since people living in urban areas spend more than 90% of their time indoors [16]. Only some of these reports have, however, dealt with indoor air quality in offices located in mechanically ventilated buildings [1,3,4,[11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

An integrated approach for the chemical characterization and oxidative potential assessment of indoor PM2.5

Mihucz

Szigeti

Dunster

et al. 2015

Microchemical Journal

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“…Exposure to PM of indoor air has been linked to many different diseases, including acute and chronic respiratory diseases, tuberculosis, heart disease, asthma, lung cancer, cardiovascular disease and perinatal health outcomes. Several studies have recently been published concerning the PM [24][25][26][27][28][29][30][31][32][33] and NO 2 [30][31][32] levels in classrooms all over the world. Young children are the most vulnerable population group considering the fact that they spend a large proportion of their time indoors [34].…”

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confidence: 99%

PM and CO2 variability and relationship in the different school environments

Lazović

Jovašević-Stojanović

Živković

et al. 2015

CI&CEQ

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Article Highlights• Diurnal variation of PM, CO 2 and NO 2 in classroom • PM, CO 2 and NO 2 concentrations during heating and non-heating period • Strong correlation between PM and carbon dioxide CO 2 concentrations • Management strategy for controlling of PM and CO 2 levels inside the schools is needed Abstract Indoor air quality (IAQ) is very important for children health and well-being, since children are particularly vulnerable and sensitive to the presence of air pollutants. This study was performed in two naturally ventilated schools located in the same municipality. The first school is located in an urban area, at a residential-industrial site, while the other school is situated in a rural area. School buildings were chosen based on their urban environment features. The measurements were carried out in heating and non-heating periods in duration of five consecutive working days. The objective of the study was to analyze IAQ in the classrooms with special emphasis on levels and diurnal variations of particulate matter (PM 10 and PM 2.5 ), carbon dioxide (CO 2 ) and nitrogen dioxide (NO 2 ) in occupied and unoccupied school classrooms. In this paper, the CO 2 concentrations were measured at both indoor and outdoor environments. Concentrations of CO 2 higher than 1000 ppm were regularly detected in the classrooms during teaching hours. Indoor concentrations of PM 10 were not exceeded the guideline, daily average, value of 50 µg/m 3 . Concentrations of PM 2.5 exceeded the guideline daily average value of 25 µg/m 3 in both school during heating period. Concentrations of NO 2 did not exceed the guideline value of 200 µg/m 3 . Ventilation rates were calculated and compared with the prescribed limits. In both occupied and unoccupied periods high correlation between CO 2 and PM concentrations was determined.

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Binational school-based monitoring of traffic-related air pollutants in El Paso, Texas (USA) and Ciudad Juárez, Chihuahua (México)

Cited by 61 publications

References 48 publications

Air Pollution and Acute Respiratory Response in a Panel of Asthmatic Children along the U.S.–Mexico Border

Air Pollution and Acute Respiratory Response in a Panel of Asthmatic Children along the U.S.–Mexico Border

An integrated approach for the chemical characterization and oxidative potential assessment of indoor PM2.5

PM and CO2 variability and relationship in the different school environments

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