Personal exposure of commuters in public transport to PM2.5 and fine particle counts

Developmental Biology

Baktygul Stakeeva¹  Burcu Onat¹ 

[1] Istanbul University, Faculty of Engineering, Department of Environmental Engineering, 34320 Avcilar, Istanbul, Turkey$$

关键词: Exposure concentrations;    urban transport microenvironment;    PM2.5;    particle number;   

DOI  :  10.5094/APR.2013.037

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

To investigate fine particulate air pollution generated by public transport and its microenvironment, PM_2.5 measurements and particle number counts for six particle size ranges (0.3–0.5 µm, >0.5–1.0 µm, >1.0–3.0 µm, >3.0– 5.0 µm, >5.0–10 µm and >10 µm) were obtained for four public transport modes: bus, metro–bus, car and walking. The measurements were repeated for each transport mode twice a day for 7–10 measurement days. The highest average PM_2.5 concentration was measured inside a bus (10⁶ µg/m³) during rush hours. The highest single peak measurement was a concentration of 316 µg/m³ for walking during non–rush hours. The PM_2.5 level in a car with the air conditioning fan off was approximately 2.5 times lower than the level with the air conditioning fan on. Moderate correlations were found between PM_2.5 concentrations and wind speed. Weak correlations were found between PM_2.5 concentrations, relative humidity and temperature. The results showed that the diameters of most of the particles were smaller than 0.5 µm, regardless of the transport mode. The average fine particle number (size range 0.3–0.5) for all transport modes ranged from 54 647 to 209 746 particles/10³ cm³ during rush hours and from 49 423 to 184 866 particles/10³ cm³ during non–rush hours.

【 授权许可】

Unknown   

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