Key Laboratory of Beijing on Regional Air Pollution Control, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China; Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing 100037, China.
Key Laboratory of Beijing on Regional Air Pollution Control, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
J Environ Sci (China). 2023 Oct;132:56-70. doi: 10.1016/j.jes.2022.07.007. Epub 2022 Jul 16.
Road silt loading (sL) is an important parameter in the fugitive road dust (FRD) emissions. In this study, the improved Testing Re-entrained Aerosol Kinetic Emissions from Roads (TRAKER) combined with the AP-42 method was firstly developed to quickly measure and estimate the sLs of paved roads in Beijing, China. The annual average sLs in Beijing was 0.59±0.31 g/m in 2020, and decreased by 22.4% compared with that in 2019. The seasonal variations of sLs followed the order of spring > winter > summer > autumn in the two years. The seasonal mean road sLs on the same type road in the four seasons presented a decline trend from 2019 to 2020, especially on the Express way, decreasing 47.4%-72.7%. The road sLs on the different type roads in the same season followed the order of Major arterial ∼ Minor arterial ∼ Branch road > Express road, and Township road ∼ Country highway > Provincial highway ∼ National highway. The emission intensities of PM and PM from FRD in Beijing in 2020 were lower than those in 2019. The PM and PM emission intensities at the four planning areas in the two years all presented the order of the capital functional core area > the urban functional expansion area > the urban development new area > the ecological conservation and development area. The annual emissions of PM and PM from FRD in Beijing in 2020 were 74,886 ton and 18,118 ton, respectively, decreasing by ∼33.3% compared with those in 2019.
道路扬尘负荷（sL）是飞逸道路尘（FRD）排放的一个重要参数。本研究中，首次开发了改进的Testing Re-entrained Aerosol Kinetic Emissions from Roads（TRAKER）与 AP-42 方法相结合，以快速测量和估算中国北京铺砌道路的 sL。2020 年北京市的年平均 sL 为 0.59±0.31 g/m，与 2019 年相比下降了 22.4%。两年中 sL 的季节性变化顺序为春季>冬季>夏季>秋季。同一类型道路在四个季节的季节性平均道路 sL 呈 2019 年至 2020 年下降趋势，尤其是高速公路，降幅为 47.4%-72.7%。同一季节不同类型道路的道路 sL 顺序为主要动脉>次要动脉>分支道路>高速公路，以及乡镇道路>国道>省道>国道。2020 年北京市 FRD 中 PM 和 PM 的排放强度低于 2019 年。两年中四个规划区的 PM 和 PM 排放强度均呈现首都功能核心区>城市功能拓展区>城市发展新区>生态保护与发展区的顺序。2020 年北京市 FRD 中 PM 和 PM 的年排放量分别为 74886 吨和 18118 吨，与 2019 年相比下降了约 33.3%。
