Evaluating near highway air pollutant levels and estimating emission factors: Case study of Tehran, Iran.
作者： Mohammad Nayeb Yazdi , Maryam Delavarrafiee , Mohammad Arhami
DOI: 10.1016/J.SCITOTENV.2015.07.141
关键词:
摘要: A field sampling campaign was implemented to evaluate the variation in air pollutants levels near a highway Tehran, Iran (Hemmat highway). The measurements were used estimate road link-based emission factors for average vehicle fleet. These compared with results of an tunnel measurement (in Resalat tunnel). Roadside and in-tunnel carbon monoxide (CO) size-fractionated particulate matter (PM) conducted during campaign. concentration gradient diagrams showed exponential decay, which represented substantial more than 50-80%, level distance between 100 150meters (m) highway. changes particle size distribution by distancing from also captured evaluated. shifted larger particles empirical obtained using roadside hypothetical box model, floating machine CALINE4, CT-EMFAC or COPERT. Average CO estimated be range 4 12g/km, those PM10 0.1 0.2g/km, depending on traffic conditions. Variations these under real working condition speeds determined.
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