Emission Factor of Paved Road Fugitive Dust Sources in Shenzhen
In this study,the dust load and emission factors of PM10 and PM2.5 in Shenzhen were obtained through data research,field research,dust load testing,and model estimation,which provided basic data for emission inventory,and also supported the refined management of the atmospheric environment.It is found that:(1)the dust load of roads at all levels in Shenzhen ranges from 0.21 g/m2 to 0.58 g/m2,the emission factor of PM10 ranges from 0.19 g/VKT to 0.47 g/VKT,and the emission factor of PM2.5 ranges from 0.05 g/VKT to 0.11 g/VKT,with the trend of"secondary road＜expressway＜main road＜branch road".(2)Roads with asphalt as paving material and roads with intact pavement have smaller dust loads.It is recommended that asphalt be used as paving material and road maintenance be strengthened in order to reduce the road dust loads and road dust emissions.(3)The differences in road dust load and emission factors of PM10 and PM2.5 between different cities are relatively significant,so cities should carry out localization testing to provide more reliable basic data for emission inventories.
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