Jo Wan-Kuen, Kim Ki-Young, Park Kun-Ho, Kim Yoo-Keun, Lee Hwa-Woon, Park Jong-Kil
Department of Environmental Engineering, Kyungpook National University, Daegu 702-701, South Korea.
Environ Res. 2003 Jun;92(2):166-71. doi: 10.1016/s0013-9351(03)00013-6.
The current study examined the hypothesis that there may be vertical variation in mobile source-related volatile organic compound (VOC) concentrations in high-rise apartment buildings. One hundred twelve homes in 56 high-rise apartment buildings with 10 or more stories participated in the study. Both the outdoor and the indoor air concentrations of three VOCs [methyl-tertiary butyl ether (MTBE), benzene, and toluene] were significantly higher for the low-floor apartments than for the high-floor apartments (P < 0.05). The median outdoor concentrations were 5.4, 6.8, and 29.1 microgram/m3, respectively, for the low-floor apartments, yet 4.4, 4.3, and 21.9 microgram/m3, respectively, for the high-floor apartments. Meanwhile, the median indoor concentrations were 6.3, 9.4, and 44.8 microgram/m3, respectively, for the low-floor apartments, yet 5.1, 7.6, and 38.8 microgram/m3, respectively, for the high-floor apartments. These findings indicate that residents of low-floor apartments are exposed to elevated residential levels of mobile source-related VOCs compared to high-floor apartment residents. The indoor concentrations of the target VOCs, except for MTBE, were significantly higher than the outdoor air concentrations for both the low and high floors (P < 0.05). Plus, the outdoor and indoor VOC concentrations were significantly different between the daytime and nighttime data sets for both low- and high-floor apartments, with a P value of less than or close to 0.05.
本研究检验了一个假设，即高层公寓楼中与移动源相关的挥发性有机化合物（VOC）浓度可能存在垂直变化。56栋10层及以上的高层公寓楼中的112户家庭参与了该研究。低楼层公寓的三种VOCs（甲基叔丁基醚（MTBE）、苯和甲苯）的室外和室内空气浓度均显著高于高楼层公寓（P < 0.05）。低楼层公寓的室外浓度中位数分别为5.4、6.8和29.1微克/立方米，而高楼层公寓分别为4.4、4.3和21.9微克/立方米。同时，低楼层公寓的室内浓度中位数分别为6.3、9.4和44.8微克/立方米，而高楼层公寓分别为5.1、7.6和38.8微克/立方米。这些发现表明，与高楼层公寓居民相比，低楼层公寓居民接触到的与移动源相关的VOCs住宅水平更高。除MTBE外，低楼层和高楼层目标VOCs的室内浓度均显著高于室外空气浓度（P < 0.05）。此外，低楼层和高楼层公寓白天和夜间数据集的室外和室内VOC浓度均存在显著差异，P值小于或接近0.05。
