Road fugitive dust emission characteristics in Beijing during Olympics Game 2008 in Beijing,China |
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| Authors: | Fan Shou-bin Tian Gang Li Gang Huang Yu-hu Qin Jian-ping Cheng Shui-yuan |
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| Institution: | 1. Department of Environmental Sciences and Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. Key Lab of Aerosol Chemistry & Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710049, China;3. Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Canada;4. International Joint Research Center for Persistent Toxic Pollutants, School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China;5. South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China;6. Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;1. Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai 200241, China;2. School of Geographic Sciences, East China Normal University, Shanghai 200241, China;3. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China;1. Key Lab of Aerosol Chemistry & Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710061, China;2. Department of Atmospheric Sciences, National Taiwan University, Taipei 10617, Taiwan;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. National Center for Atmospheric Research, Boulder, CO 80303, USA;5. Institute of Global Environmental Change, Xi''an Jiaotong University, Xi''an 710049, China;6. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland |
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| Abstract: | Eighty road dust-fall (DF) monitoring sites and 14 background monitoring sites were established in the Beijing metropolitan area, and monitoring was conducted from January 2006 to December 2008. The dust-fall attributable to roads (ΔDF) showed a clear decline from 2006 to 2008. Dust-fall levels decreased across different road types from freeway > major arterial roads > minor arterial roads > collector roads > background sites. The ΔDF showed declines of 65%, 55%, 65% and 84% respectively for freeways, major arterial, minor arterial and collector roads from August 2007 to August 2008, and declines of 77%, 76%, 82% and 82% between August 2006 and August 2008. The ΔDF declined by 80%, 79%, 82% and 69% for freeways, major arterial, minor arterial and collector roads respectively between September 2007 and September 2008, and declined by 84%, 88%, 80% and 81% between September 2006 and September 2008.Eighty samples were collected in August 2007 and August 2008 and analyzed for silt loading. PM10 emission factors and emission strengths were calculated using the AP-42 model. The silt loading reduced by 77%, 35%, 61%, 59% and 75% for freeways, major arterial, minor arterial, collector and local roads respectively. The PM10 emission factors were reduced by 57%, 15%, 36%, 51% and 61% and the PM10 emission strength declined by 70%, 40%, 55%, 65% and 72% for freeways, major arterial, minor arterial, collector and local roads respectively between August 2007 and August 2008. The decline is consistent with the reduction in road dust-fall. |
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