基于移动采样法的石家庄市秋冬季道路扬尘PM2.5排放清单

以石家庄城市道路扬尘为研究对象，于2014~2015年秋冬季采用移动式采样法收集不同类型道路积尘。分析道路积尘负荷、道路积尘粒径分布特征、车流量和平均车重等数据，计算得出石家庄道路扬尘PM2.5排放因子和排放量。通过地理信息系统软件（GIS）提取研究区域道路信息，制作道路矢量化图，并结合道路扬尘PM2.5排放因子和排放量，建立排放清单。结果表明，秋季各道路扬尘PM2.5排放因子为0.003~0.103 g·VKT-1，冬季各道路扬尘PM2.5排放因子为0.004~0.016 g·VKT-1；秋、冬两季不同类型道路扬尘PM2.5排放因子分布特征为快速路 > 主干道 > 次干道 > 支路；秋季道路扬尘PM2.5排放量为6.47~53.07 t，冬季为3.47~12.02 t，秋季排放量大于冬季排放量，秋、冬两季道路扬尘PM2.5排放量分布特征为快速路 > 支路 > 主干道 > 次干道。

Road dust PM2.5 emission inventory analysis based on mobile sampling method of Shijiazhuang city during autumn and winter

Eight paved roads were chosen for collecting dust samples, which were as the research object in Shijiazhuang city. And mobile sampling method was applied for road dust collection during Oct. 2014 and Jan.2015.With the data of dust particle size distribution, traffic flow and average vehicle weight, road dust PM2.5 emission factor and emission strength were calculated. And the road vector information was extracted through using GIS software. Combining with road dust PM2.5 emission strength and road vector information, the road dust emission inventory of Shijiazhuang city was obtained. The results showed as follows:Road dust PM2.5 emission factors were 0.003~0.103 g·VKT-1 in autumn, while 0.004~0.016 g·VKT-1 in winter. For these two seasons, road dust PM2.5 emission factor characteristic was expressway > trunk road > secondary trunk road > branch road. While road dust PM2.5 emission strengths were 6.47~53.07 t in autumn and 3.47~12.02 t in winter. Road dust PM2.5 emission strength sequence was expressway > branch road > trunk road > secondary trunk road. At last, road dust PM2.5 emission inventory during autumn and winter were represented respectively.