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Differences in indoor versus outdoor concentrations of ultrafine particles, PM2.5, PMabsorbance and NO2 in Swiss homes

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Title Differences in indoor versus outdoor concentrations of ultrafine particles, PM2.5, PMabsorbance and NO2 in Swiss homes
 
Creator MEIER, R
EEFTENS, M
PHULERIA, HC
INEICHEN, A
CORRADI, E
DAVEY, M
FIERZ, M
DUCRET-STICH, RE
AGUILERA, L
SCHINDLER, C
ROCHAT, T
PROBST-HENSCH, N
TSAI, MY
KUNZLI, N
 
Subject 4 EUROPEAN CITIES
PARTICULATE MATTER
EXPOSURE
ENVIRONMENTS
PENETRATION
CARBON
MASS
indoor air pollution
ultrafine particles
particulate matter
NO2
SAPALDIA
Switzerland
 
Description 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/cm3 (interquartile range= 7200); 8.7 mu g/m(3) (6.5) PM2.5 and 10.2 mu g/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.
 
Publisher NATURE PUBLISHING GROUP
 
Date 2016-01-15T06:35:16Z
2016-01-15T06:35:16Z
2015
 
Type Article
 
Identifier JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, 25(5)499-505
1559-0631
1559-064X
http://dx.doi.org/10.1038/jes.2015.3
http://dspace.library.iitb.ac.in/jspui/handle/100/17946
 
Language en