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Motor Vehicle Related Air Toxic Measurements Along an Urban Street

机译：沿城市街道的机动车相关空气有毒物质测量

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Nose-level measurements of air toxics were made along a busy urban street in Ottawa forrn2-hour periods during morning, noon, and afternoon rush hours in the summer of 1994,rnwinter of 2000 and summer of 2000. Measurements were also made in a commuter carrnand a transit bus during morning and afternoon commutes in 2000. Ottawa is anrnappropriate choice of location for the measurement of motor vehicle related toxic andrnreactive compounds, as it has virtually no heavy industry that could be contributing to thernambient loadings. The sampling stations were located on Slater Street, a major one-wayrnartery running west to east through the downtown core and carrying approximately 750rnvehicles per hour during the weekday sampling periods. Light duty vehicles constitutern80-90% of the vehicle traffic but the artery is responsible for the major part of the publicrntransit bus traffic in this direction. For comparison, there is a National Air PollutionrnSurveillance (NAPS) network station within two blocks of the nose-level samplingrnstation and a temporary station was also set up on the rooftop of an adjacent three -storeyrnparking structure during the 2000 study. The NAPS and rooftop stations providernobservations at different heights (4 m and 10 m) and sampling periods (24 h) relative tornthe nose-level stations. The sampling involved 6 L Summa canisters for VOCs, Tenaxrnadsorbent cartridges for SVOCs, DNPH cartridges for carbonyl compounds, PM_(2.5)rnsampling cyclones with Teflon and quartz filters. Laboratory analyses were carried outrnfor a list of 165 VOCs and SVOCs by GC-FID, 22 carbonyl compounds by HPLC,rnorganic and elemental carbon (OC/EC) on PM samples by thermal/optical transmittancern(TOT) and trace metals analysis on PM samples by x-ray fluorescence). Statisticalrndistributions of all measured parameters are presented and comparisons made betweenrnsummer and winter sessions as well as similar measurements from other locationsrnavailable in the literature.
机译：在1994年夏季，2000年冬季和2000年夏季的上午，中午和下午高峰时间的2小时时段内，在渥太华繁忙的城市街道上进行了鼻子级的空气中毒物测量。在通勤者中也进行了测量。 Carrnand公交车在2000年的早上和下午通勤。渥太华是测量与机动车有关的有毒和反应性化合物的合适地点，因为它实际上没有重工业，可能导致环境负荷过大。采样站位于Slater街，这是一条主要的单向车道，贯穿市中心从西向东延伸，在工作日的采样期间每小时每小时运送约750辆汽车。轻型车辆占车辆交通量的80-90％，但动脉是该方向公交车交通的主要部分。为了进行比较，在2000年的研究期间，在鼻子水平采样站的两个街区内有一个国家空气污染监视（NAPS）网络站，并且还在相邻的三层停车场结构的屋顶上建立了一个临时站。 NAPS和屋顶台站相对于鼻子高度台站在不同高度（4 m和10 m）和采样周期（24 h）提供观测。采样涉及6 L用于VOC的Summa碳粉罐，用于SVOC的Tenaxrn吸附剂盒，用于羰基化合物的DNPH盒，带有特氟龙的PM_（2.5）采样旋风分离器和石英滤池。通过GC-FID对165种VOC和SVOC进行了实验室分析，通过HPLC对22种羰基化合物，通过热/光学透射率（TOT）对PM样品进行了有机和元素碳（OC / EC）以及对PM样品进行痕量金属分析通过X射线荧光）。给出了所有测量参数的统计分布，并在夏季和冬季之间进行了比较，并从文献中获得了其他位置的类似测量结果。

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