Characterization of particle number concentrations and PM2.5 in a school: influence of outdoor air pollution on indoor air

Abstract

The findings obtained in this study are useful for epidemiological studies to estimate the total personal exposure of children, and to develop appropriate control strategies for minimising the adverse health effects on school children.

Characteristics of Organic and Elemental Carbon in PM2.5 and PM0.25 in Indoor and Outdoor Environments of a Middle School: Secondary Formation of Organic Carbon and Sources Identification

“…Interestingly, the SOC proportion was higher outdoors than indoors for both size fractions, which might be due to the occurrence of photochemical reactions outdoors. Generally, walls and windows reduce sunlight in buildings, and consequently photochemical formation of SOC at indoors [55,56]. This is supported in this study by the fact that the average PM0.25 indoor SOC percentage was found to be the lowest.…”

Can Social Media Clear the Air? A Case Study of the Air Pollution Problem in Chinese Cities

“…In a study carried out in Shanghai, Huang et al (2009) found that low visibility, which is highly correlated with increased concentrations of PM2.5 and PM10, is significantly associated with elevated death rates from cardiovascular disease on the time scale of just one day. Guo et al (2010) found that outdoor air pollution has an hour-to-hour effect on indoor air pollution levels, meaning that staying inside (without air filtration) provides little respite from pollutants, to say nothing of those commuting by foot or bicycle. It is likely that it will be several decades before clean air is abundant enough in Chinese cities to be enjoyed by those who cannot afford prime real estate or air filtration systems.…”

Particles in the Indoor Environment

“…In a European survey of 45 schools contents between 14 and 260 µg/m³ (PM 10 ) were measured (HESE, 2006). Different studies showed for PM 2.5 a ratio of indoor to outdoor air was in the range of 1 and a strong dependence on the outdoor air contents (Diapouli et al, 2007;Fromme et al, 2007;Wichmann et al, 2010;Guo et al, 2010). The situation is different if coarse particle fractions are considered.…”