| Literature DB >> 25670021 |
Reto Meier1, Marloes Eeftens1, Harish C Phuleria2, Alex Ineichen1, Elisabetta Corradi1, Mark Davey1, Martin Fierz3, Regina E Ducret-Stich1, Inmaculada Aguilera1, Christian Schindler1, Thierry Rochat4, Nicole Probst-Hensch1, Ming-Yi Tsai1, Nino Künzli1.
Abstract
Indoor air quality is a growing concern as we spend the majority of time indoors and as new buildings are increasingly airtight for energy saving purposes. For a better understanding of residential indoor air pollution in Switzerland we conducted repeated 1-2-week-long indoor and outdoor measurements of particle number concentrations (PNC), particulate matter (PM), light absorbance of PM2.5 (PMabsorbance) and nitrogen dioxide (NO2). Residents of all homes were enrolled in the Swiss Cohort Study on Air Pollution and Lung and Heart Diseases in Adults (SAPALDIA). Indoor levels were comparable in urban areas and generally low in rural homes. Average indoor levels were 7800 particles/cm(3) (interquartile range=7200); 8.7 μg/m(3) (6.5) PM2.5 and 10.2 μg/m(3) (11.2) NO2. All pollutants showed large variability of indoor/outdoor ratios between sites. We observed similar diurnal patterns for indoor and outdoor PNC. Nevertheless, the correlation of average indoor and outdoor PNC between sites as well as longitudinal indoor/outdoor correlations within sites were low. Our results show that a careful evaluation of home characteristics is needed when estimating indoor exposure to pollutants with outdoor origin.Entities:
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Year: 2015 PMID： 25670021 DOI： 10.1038/jes.2015.3
Source DB: PubMed Journal: J Expo Sci Environ Epidemiol ISSN： 1559-0631 Impact factor: 5.563