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KMID : 0382420000260040058
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Korean Journal of Environmental Health Society
2000 Volume.26 No. 4 p.58 ~ p.64
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of Nitrogen Dioxide Exposure for University Students by Activity Pattern of Weekday and Weekend
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Yang Won-Ho
Jeong Mun-Ho
Son Bu-Soon
Park Jong-An
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Abstract
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Indoor air quality tends to be the dominant contributor to personal exposure, because most people spend over 80% of their time indoors. In this study, indoor and outdoor NO_2 concentrations were measured and compared with simultaneously personal exposures of 21 university students in weekday and weekend. House characteristics and activity pattern were used to determine the impacts of these factors on personal exposure. Since university students spent most of their times in indoor, their NO_2 exposure was associated with indoor NO_2 level rather than outdoor NO_2 level both weekday and weekend in spite of different time activity. Using time-weighted average model, NO_2 exposures of university students were estimated by NO_2 measurements in indoor home, indoor school, and outdoor home levels. Estimated NO_2 personal exposures were significantly correlated with measured NO_2 personal exposures (r^2=0.87). However, estimated personal NO_2 exposures by time-weighted average model were underestimated, comparing with the measured personal NO_2 exposures. Using multiple regression analysis, effect of personal NO_2 exposure for transportation was confirmed.
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