Characterization of Ultrafine Particles and Other Traffic Related Pollutants Near Roadways in Beijing

Details

• Personal Author:
  Xie X ; Yan C ; Yu N ; Zheng M ; Zhu Y
• Description:
  Developing countries, such as China, are facing serious air pollution issues due to their fast economic development and lack of appropriate regulations. In this study, traffic related air pollutants, such as the number concentrations of ultrafine particles (UFPs, particles with diameter < 100 nm), mass concentrations of PM2.5 and black carbon (BC) were measured near the Peking University (PKU) campus in Beijing from December 10th to 23rd, 2011. Data were collected concurrently at a roadside site and a campus site. The roadside site was located approximately 25 meters from a roadway intersection with heavy daily vehicle traffic, and the campus site was on the roof of a six-story building that was surrounded by restaurants and dining halls on campus. Meteorological data were collected from a weather station located at approximately 9 kilometers Southwest of PKU. The traffic density at the roadside site was determined from recorded video footage. No correlation was found between UFP number concentrations and PM2.5 mass concentrations. A linear correlation between BC and PM2.5 mass concentrations was found with R2=0.57. No apparent correlation was found between wind speed and UFP number concentrations, although strong log-decay correlations were found between wind speed and PM2.5, as well as BC mass concentrations with R2s ranging from 0.93 to 0.97. During the measurements, there are three days when both PM2.5 mass concentrations and UFP number concentrations were higher at the campus site than at the roadside site. This suggests there were strong PM local emission sources on campus. Diurnal patterns of PM2.5 mass and UFP number concentrations showed peaks around lunch time suggesting that the emissions may come from the surrounding restaurants and student dining halls that use Chinese-style cooking which has been associated with high UFP emissions. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Carbon Dioxide Occupational Health Particulate Matter Safety
• Keywords:
  Air Pollutants Automotive Emissions Carbon Black Carbon Dioxide Particulates Ultrafine Particles
• Publisher:
  American Association for Aerosol Research
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Abstract or Summary
• Place as Subject:
  California ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20055861
• Citation:
  Proceedings of the AAAR 32nd Annual Conference, September 30-October 4, 2013, Portland, Oregon. Mount Laurel, NJ: American Association for Aerosol Research, 2013 Sep-Oct; :2UA.5
• CAS Registry Number:
  Carbon black (CAS RN 1333-86-4)
• Federal Fiscal Year:
  2013
• Performing Organization:
  University of California Los Angeles
• Peer Reviewed:
  False
• Start Date:
  20050701
• Source Full Name:
  Proceedings of the AAAR 32nd Annual Conference, September 30-October 4, 2013, Portland, Oregon
• End Date:
  20270630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3bad4c17c3c3c31fe91ba8b30682f60c31182fded87c88eb9235828f1838df2460e18b5a2c76e8c4fb0a383471f759ee006d693efc117cb9be82c029fde1630e
• Download URL:
  https://stacks.cdc.gov/view/cdc/213622/cdc_213622_DS1.pdf
• File Type:
  [PDF - 217.81 KB ]