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Factors Influencing Personal Exposure to Nitrogen Dioxide in an Indian Metropolitan Region

Factors Influencing Personal Exposure to Nitrogen Dioxide in an Indian Metropolitan Region This study was carried out in a mixed residential and industrial area of Mumbai. Nitrogen dioxide (NO<sub>2</sub>) concentrations were measured over 2-day periods both in winter (Feb. 1996) and summer (April 1996). Personal exposures as well as indoor and outdoor levels were monitored for 43 respondents. Personal exposures were found to vary substantially among the respondents, ranging from 10.2 to 87.5 ppb with a mean of 43.7 ± 16 ppb in winter and 23.6 ± 7.8 ppb in summer. Regression analysis of the data showed that there is a 37 and 47% correlation of personal exposure with indoor and outdoor concentration, respectively. ANOVA results showed that season of the year, house size and outdoor occupation significantly influenced the personal exposure to NO<sub>2</sub> whereas it was not influenced by factors like type of fuel used and ambient air quality level. Personal exposure to NO<sub>2</sub> was significantly greater in winter than in summer. Respondents staying in smaller houses and/or having outdoor occupation were exposed to higher NO<sub>2</sub> levels. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Indoor and Built Environment Karger

Factors Influencing Personal Exposure to Nitrogen Dioxide in an Indian Metropolitan Region

Indoor and Built Environment , Volume 7 (5-6): 14 – Dec 1, 1998

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Publisher
Karger
Copyright
© 1998 S. Karger AG, Basel
ISSN
1420-326X
eISSN
1423-0070
DOI
10.1159/000024601
Publisher site
See Article on Publisher Site

Abstract

This study was carried out in a mixed residential and industrial area of Mumbai. Nitrogen dioxide (NO<sub>2</sub>) concentrations were measured over 2-day periods both in winter (Feb. 1996) and summer (April 1996). Personal exposures as well as indoor and outdoor levels were monitored for 43 respondents. Personal exposures were found to vary substantially among the respondents, ranging from 10.2 to 87.5 ppb with a mean of 43.7 ± 16 ppb in winter and 23.6 ± 7.8 ppb in summer. Regression analysis of the data showed that there is a 37 and 47% correlation of personal exposure with indoor and outdoor concentration, respectively. ANOVA results showed that season of the year, house size and outdoor occupation significantly influenced the personal exposure to NO<sub>2</sub> whereas it was not influenced by factors like type of fuel used and ambient air quality level. Personal exposure to NO<sub>2</sub> was significantly greater in winter than in summer. Respondents staying in smaller houses and/or having outdoor occupation were exposed to higher NO<sub>2</sub> levels.

Journal

Indoor and Built EnvironmentKarger

Published: Dec 1, 1998

Keywords: Nitrogen dioxide; India

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