Fiber Classification and the Influence of Average Air Humidity

Details

• Personal Author:
  Ahmadi G ; Baron, Paul A. ; Cheng YS ; Deye G ; Hopke PK ; Su WC ; Wang ZC
• Description:
  The use of man-made vitreous fibers (MMVFs) as a substitute for asbestos in industrial and residential applications has raised the concerns of the potential hazards associated with inhalable aerosolized fibers. The complex movement of fiber makes it difficult to predict the pattern of fiber deposition in human airways from the behavior of spherical particles. Difficulties in producing monodisperse length fibers has been an obstacle to study fibrous particle deposition in the human respiratory system. To address this problem, a narrow length distribution of fibers was generated using dielectrophoretic classification. Dielectrophoresis is the motion of neutral matter in a nonuniform electric field due to an induced dipole moment. It is sensitive to the conductivity of the matter in the field. A fiber classifier has been used to study the influence of atmospheric humidity on the behavior of glass fibers. Glass fibers, as insulators, can not be classified by the dielectrophoretic classifier. However, our study shows that a humidity higher than 15% RH can change the conductivity of the glass fibers so as to permit their effective classification. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Asbestos Dust Humidity Inorganic Chemicals Occupational Exposure Occupational Health Particulate Matter Safety
• Keywords:
  Aerosol-particles Airborne-fibers Asbestos-dust Asbestos-fibers Occupational-hazards Occupational-health Particulate-dust Particulates
• ISSN:
  0278-6826
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New Mexico ; New York ; Ohio ; OSHA Region 2 ; OSHA Region 5 ; OSHA Region 6
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  39
• Issue:
  11
• NIOSHTIC Number:
  nn:20029140
• Citation:
  Aerosol Sci Technol 2005 Nov; 39(11):1056-1063
• Contact Point Address:
  Philip K. Hopke, Center for Air Resources Engineering and Science, Clarkson University, Box 5708, Potsdam, New York 13699
• Email:
  hopkepk@clarkson.edu
• Federal Fiscal Year:
  2006
• Performing Organization:
  Lovelace Biomedical & Environmental Research, Albuquerque, New Mexico
• Peer Reviewed:
  True
• Start Date:
  20020901
• Source Full Name:
  Aerosol Science and Technology
• End Date:
  20080831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:716731b929a33ddd890922f832a78abb987f949b30c67b138e483a0d1ad1cf8e067306d25d2885db13be50d83e21f89e297a714c8cbd8ea77148dfca23d2e0b1
• Download URL:
  https://stacks.cdc.gov/view/cdc/190192/cdc_190192_DS1.pdf
• File Type:
  [PDF - 1.08 MB ]