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Assessment of Personal Exposure to Nitrogen Dioxide in Primary Schoolchildren  

Cho Yong-Sung (National Center for Environmental Health, National Institute of Environmental Research)
Lee Jong-Tae (Department of Public Health and Management, Hanyang University)
Kim Yoon-Shin (Department of Public Health and Management, Hanyang University)
Publication Information
Journal of Environmental Health Sciences / v.32, no.3, 2006 , pp. 207-214 More about this Journal
Abstract
This study was designed to assess the level of nitrogen dioxide from several microenvironments including inside the home, outdoors near the home, inside the school, outdoors near the school, and on the road for 42 primary schoolchildren during the month of December 2002 in Seoul, Korea. The average personal, indoor, outdoor $NO_2$ levels, and indoor/outdoor ratio were 45.08 ppb, 27.89 ppb, 30.96 ppb, and 0.89, respectively. The indoor $NO_2$ concentrations were significantly associated with the presence of a smoker with a gas stove. The estimated personal $NO_2$ exposure using time-weighted average equation of $34.64{\pm}5.29$ ppb was significantly lower than the measured personal exposure of $45.08{\pm}5.50$ ppb. Our results indicate that indoor $NO_2$ levels were associated with the presence of a smoker and a gas stove. Moreover, personal $NO_2$ exposure with a gas stove in the house was significantly higher than those without a gas stove.
Keywords
air pollution; $NO_2$; time-weighted model; microenvironment; primary schoolchildren;
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