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Characteristics And Source Identification Of Roadside Suspended Particles

机译：路边悬浮颗粒物的特征与来源识别

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Suspended particles (TSP and PM_(10)) are sampled on the weekend and on weekdays during four consecutive seasons. Water-soluble ionic species and metallic contents of suspended particles were further analyzed. Chemical analysis showed that the most abundant metals found in roadside suspended particles were Ca, Fe, and Al, while the most abundant ions were SO_4~(2-), NO_3~-, and NH_4~-. Field sampling of suspended particles indicated that TSP and PM_(10) concentrations in the daytime were higher than those at night. PM_(10) concentration on weekends was higher than on weekdays, while TSP concentration did not vary much between weekdays and weekend. PM_(10) was contributed by the long-distance transportation of non-traffic pollutants as well as the emissions of local road-traffic sources, while TSP related closely to the emissions of local road-traffic sources. Both approaches indicate that the major sources contributing to roadside suspended particles were vehicular emissions and fugitive road dust. However, the upwind non-traffic sources also contributed a noticeable portion of roadside suspended particles.
机译：在连续四个季节的周末和工作日对悬浮颗粒（TSP和PM_（10））进行采样。进一步分析了悬浮颗粒的水溶性离子种类和金属含量。化学分析表明，在路边悬浮颗粒中发现的最丰富的金属为Ca，Fe和Al，而最丰富的离子为SO_4〜（2-），NO_3〜-和NH_4〜-。悬浮颗粒的现场采样表明，白天的TSP和PM_（10）浓度高于晚上的浓度。周末的PM_（10）浓度高于工作日，而TSP的浓度在工作日和周末之间变化不大。 PM_（10）是由于非交通污染物的长距离运输以及当地道路交通源的排放而引起的，而TSP与当地道路交通源的排放密切相关。两种方法均表明，造成路边悬浮颗粒的主要来源是车辆排放物和逃逸的道路扬尘。但是，上风非交通源也占路边悬浮颗粒的显着部分。

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