Lin Tzu-Chi, Chiueh Pei-Te, Griffith Stephen M, Liao Chien-Chieh, Hsiao Ta-Chih
Graduate Institute of Environmental Engineering, College of Engineering, National Taiwan University, 71, Chou-Shan Road, Taipei, 106, Taiwan.
Department of Atmospheric Sciences, National Central University, No. 300, Zhongda Rd., Zhongli District, Taoyuan City, 32001, Taiwan.
Environ Res. 2022 Mar;204(Pt D):112349. doi: 10.1016/j.envres.2021.112349. Epub 2021 Nov 12.
Traffic-related air pollutants (TRAPs) pose a serious health hazard for residents and commuters in urban areas. In this study, a real-time mobile monitoring system was deployed in Taipei, a typical East Asian city with an overlap of high population density, traffic, and special structures (e.g., viaducts), to capture the on-road TRAPs at different times of the day. In general, black carbon, ultrafine particles (UFPs), CO concentrations, and lung deposition surface area (LDSA) were positively correlated with traffic flow, and for PM, a more independent fluctuating concentration was observed. During rush-hour periods, the mean concentrations of UFPs, PM, and LDSA were 6.12 × 10 ± 3.83 × 10 cm, 23 ± 8 μg/m, and 2.29 × 10 ± 1.20 × 10 μm/cm, respectively. Additionally, the UFP number concentration and LDSA were two times higher along the high-traffic commuting route than along the lower traffic route. Pollutants tended to accumulate at sites near viaducts and high buildings and were significantly influenced by vehicle composition. In this study, the ratio of LDSA to total particle surface area concentration was used as an indicator of the degree of particle irregularity, which was directly related to aging during transport.
与交通相关的空气污染物（TRAPs）对城市地区的居民和通勤者构成严重的健康危害。在本研究中，一个实时移动监测系统部署在了台北，这是一个典型的东亚城市，人口密度高、交通繁忙且有特殊结构（如高架桥）重叠，目的是捕捉一天中不同时间的道路TRAPs。一般来说，黑碳、超细颗粒物（UFPs）、一氧化碳浓度和肺部沉积表面积（LDSA）与交通流量呈正相关，而对于颗粒物（PM），观察到其浓度有更独立的波动。在高峰时段，UFPs、PM和LDSA的平均浓度分别为6.12×10±3.83×10厘米、23±8微克/立方米和2.29×10±1.20×10微米/厘米。此外，高流量通勤路线沿线的超细颗粒物数量浓度和肺部沉积表面积是低流量路线沿线的两倍。污染物倾向于在高架桥和高楼附近的地点积聚，并受到车辆组成的显著影响。在本研究中，肺部沉积表面积与总颗粒表面积浓度的比值被用作颗粒不规则程度的指标，这与运输过程中的老化直接相关。
