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Temporal-spatial distributions of road silt loadings and fugitive road dust emissions in Beijing from 2019 to 2020

查看全文 作　　者：Haibin [1,2]Wang;Lihui [1]Han;Tingting [2,3]Li;Song [2,3]Qu;Yuncheng [2,3]Zhao;Shoubin [2,3]Fan;Tong [2]Chen;Haoran [1,2]Cui;Junfang [1,2]Liu 高影响力作者 机构地区：[1]Key Laboratory of Beijing on Regional Air Pollution Control,Faculty of Environment and Life,Beijing University of Technology,Beijing 100124,China;[2]Beijing Municipal Research Institute of Eco-Environmental Protection,Beijing 100037,China;[3]National Engineering Research Center of Urban Environmental Pollution Control,Beijing 100037,China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2023年第10期,共15页高影响力期刊 基　　金：This research was funded by the Development and Demonstration of Road Dust Monitoring and Management System(No.Z191100009119011);the National Research Program for Key Issues in Air Pollution Control China(No.DQGG0201);the National Key Research and Development program of China(No.2018YFC0213203). 摘　　要：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^(2)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^(2)019 to 2020,especially on the Expressway,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 PM10 and PM_(2.5)from FRD in Beijing in 2020 were lower than those in 2019.The PM10 and PM_(2.5)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 PM10 and PM_(2.5)from FRD in Beijing in 2020 were 74,886 ton and 18,118 ton,respectively,decreasing by∼33.3%compared with those in 2019. 关 键 词：Road silt loading Temporal-spatial distribution Emission factor Emission inventory
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