Periodic Flow Purging System for Harvesting Fibers from Screens

Details

• Personal Author:
  Deye G ; Ku BK ; Turkevich LA
• Description:
  Fiber length is believed to be an important factor in determining various toxicological responses to asbestos and other bio-persistent fibers. Length classification of fibers thus is crucial for toxicological assessment. Nylon mesh screens have been shown to be effective in separating fibers by length. In this note, we report development of a purging flow system for harvesting fibers from a nylon net screen, with the aim of separating airborne fibers by length. We evaluated the performance of this purging flow system by examining the lengths of glass fibers collected on a screen. Fibers aerosolized by vortex shaking were provided to 10 µm and 20 µm mesh screens, and the fibers collected on each screen were purged periodically with a backflow. The length of the purged fibers was measured and compared to that of fibers washed from the screen. The mean length of fibers on the screen is larger than that of the fibers in the original test aerosol. The mean length of the backflow purged fibers is smaller than that of the fibers from the washed screen. The results indicate that the purging flow system with screens can harvest the longer fibers from the original aerosol. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Filtration Glass Laboratories Occupational Health Particulate Matter Safety Toxicology Vibration
• Keywords:
  Airborne Fibers Author Keywords: Glass Fiber Fiber Length Fibrous Glass Laboratory Techniques Length Separation Measurement Equipment Nylon Mesh Screens Particle Size Performance Capability Performance Tests Purging System

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• ISSN:
  1680-8584
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division ; DFSE - Division of Field Studies and Engineering
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  21
• Issue:
  6
• NIOSHTIC Number:
  nn:20062902
• Citation:
  Aerosol Air Qual Res 2021 Jun; 21(6):210033
• Contact Point Address:
  Bon Ki Ku, Health Effects Laboratory Division (HELD), National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (CDC), Cincinnati, Ohio 45226, USA
• Email:
  bik5@cdc.gov
• Federal Fiscal Year:
  2021
• NORA Priority Area:
  Manufacturing
• Peer Reviewed:
  True
• Source Full Name:
  Aerosol and Air Quality Research
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3ee3cdb6e5cd53f0d7df5ccd85da4b27805a9d0b3f450d81845b5056cfe2fd77c11ab855aa7e11bac7e1fbc5dc81304b23b62d79195cfaf67e5d80349817c110
• Download URL:
  https://stacks.cdc.gov/view/cdc/226072/cdc_226072_DS1.pdf
• File Type:
  [PDF - 540.35 KB ]