Jo W K, Choi S J
Kyungpook National University, Taegu, Korea.
J Air Waste Manag Assoc. 1996 Aug;46(8):749-54. doi: 10.1080/10473289.1996.10467509.
This study identified in-auto and in-bus exposures to six selected aromatic volatile organic compounds (VOCs) for commutes on an urban-suburban route in Korea. A bus-service route was selected to include three segments of Taegu and one suburban segment (Hayang) to satisfy the criteria specified for this study. This study indicates that motor vehicle exhaust and evaporative emissions are major sources of both auto and bus occupants' exposures to aromatic VOCs in both Taegu and Hayang. A nonparametric statistical test (Wilcoxon test) showed that in-auto benzene levels were significantly different from in-bus benzene levels for both urban-segment and suburban-segment commutes. The test also showed that the benzene-level difference between urban-segment and suburban-segment commutes was significant for both autos and buses. An F-test showed the same statistical results for the comparison of the summed in-vehicle concentration of the six target VOCs (benzene, toluene, ethylbenzene, and o,m,p-xylenes) as those for the comparison of the in-vehicle benzene concentration. On the other hand, the in-vehicle benzene level only and the sum were not significantly different among the three urban-segment commutes and between the morning and evening commutes. The in-auto VOC concentrations were intermediate between the results for the Los Angeles and Boston. The in-bus VOC concentrations were about one-tenth of the Taipei, Taiwan results.
本研究确定了韩国一条城郊路线通勤过程中车内和公交内六种选定的芳香族挥发性有机化合物（VOCs）的暴露情况。选择了一条公交服务路线，该路线包括大邱的三个路段和一个郊区路段（河阳），以满足本研究规定的标准。本研究表明，机动车尾气排放和蒸发排放是大邱和河阳地区汽车和公交乘客接触芳香族VOCs的主要来源。非参数统计检验（威尔科克森检验）表明，无论是城区路段还是郊区路段通勤，车内苯含量与公交内苯含量均存在显著差异。该检验还表明，城区路段和郊区路段通勤之间的苯含量差异在汽车和公交中均很显著。F检验显示，六种目标VOCs（苯、甲苯、乙苯和邻、间、对二甲苯）的车内总浓度比较结果与车内苯浓度比较结果具有相同的统计结果。另一方面，仅车内苯含量以及总和在三个城区路段通勤之间以及早晚通勤之间没有显著差异。车内VOC浓度介于洛杉矶和波士顿的结果之间。公交内VOC浓度约为台湾台北结果的十分之一。
