Characterization of Gaseous and Semi-Volatile Organic Compounds Emitted from Field Burning of Rice Straw

Details

• Personal Author:
  Bich TL ; Hardie D ; Liu L-JS ; Oanh NTK ; Simpson CD ; Tipayarom A ; Tipayarom D
• Description:
  Rice straw (RS) field burning, commonly practiced in Asia, produces large amounts of toxic air pollutants but has not been comprehensively characterized. This study conducted field and laboratory measurements for gaseous pollutants and semi-VOCs (16 PAHs, 16 chlorinated pesticides and 14 PCBs) in RS burning smoke to determine emission factors (EFs) and emission concentration profiles. Paddy burning experiments were done following common practices used by farmers in Southeast Asia and EFs were estimated using the carbon balance method. Laboratory hood experiments simulated burning of dry RS (moisture content approx. 5%) and normal RS (moisture approx. 23-30%). Semi-VOCs were analyzed separately in the particulate (PM) and gas phases, and the levels measured in smoke were compared with those in the paddy background and in general ambient air to identify enrichment of the compounds. Lower EFs of all pollutants were obtained for hood burning dry RS as compared to hood burning normal RS. EFs of all detected pollutants in the field burning were higher than hood burning. The EFs of field burning in mg kg-1 RS were 760 for benzene, 230 for toluene, 510 for SO2, 490 for NO2, 260 for total PAHs (88% in gas phase), 0.11 for total PCBs (59% in gas phase) and 0.23 for OCPs (62% in gas phase). The EF of aldehydes determined in the hood experiment was 80-150 mg kg-1 RS. As compared to ambient air, RS smoke had significant enrichment of light PAHs, fluoranthene in PM and acenaphthylene in gas phase. Smoke had a higher proportion of benzene in BTEX than roadside air. Levels of PCBs, OCPs and aldehydes were higher in the burning smoke compared to ambient air, but there was no significant enrichment of particular compounds. This study provides appropriate ranges of EFs for developing emission inventory of RS spread field burning. [Description provided by NIOSH]
• Subjects:
  Agriculture Air Pollutants, Occupational Air Pollution Fires Occupational Health Particulate Matter Safety Volatile Organic Compounds
• Keywords:
  Agricultural Processes Air Pollutants Air Pollution Author Keywords: Rice Straw Burning Chlorinated Compounds Concentration Profile Emission Factor Emission Sources Environmental Impacts Gaseous Pollutants Gases PAHs Particulates VOCs Volatile Organic Compounds

  More +
• ISSN:
  1352-2310
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  182-191
• Volume:
  119
• NIOSHTIC Number:
  nn:20063671
• Citation:
  Atmos Environ 2015 Oct; 119:182-191
• Contact Point Address:
  Nguyen Thi Kim Oanh, Environmental Engineering and Management, Asian Institute of Technology, Pathumthani, Thailand
• Email:
  kimoanh@ait.ac.th
• Federal Fiscal Year:
  2016
• Performing Organization:
  University of Washington
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Atmospheric Environment
• End Date:
  20250630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e84dbab4c7ccc52474727376d7d4a7c520a33f94f5b1f561bece51185cf2e8f89869d21403bcba0f58fd323ea89da2fe74af5047442316abaef23490aa1855e8
• Download URL:
  https://stacks.cdc.gov/view/cdc/222233/cdc_222233_DS1.pdf
• File Type:
  [PDF - 338.43 KB ]