A novel device for measuring respirable dustiness using low-mass powder samples

Details

• Personal Author:
  Ellickson D ; Kang M ; O'Shaughnessy PT
• Description:
  Respirable dustiness represents the tendency of a powder to generate respirable airborne dust during handling and therefore indicates the propensity for a powder to become an inhalation hazard. The dustiness of 14 powders, including 10 different nanopowders, was evaluated with the use of a novel low-mass dustiness tester designed to minimize the use of the test powder. The aerosol created from 15-mg powder samples falling down a tube were measured with an aerodynamic particle sizer (APS). Particle counts integrated throughout the pulse of aerosol created by the falling powder were used to calculate a respirable dustiness mass fraction (D, mg/kg). An amorphous silicon dioxide nanopowder produced a respirable D of 121.4 mg/kg, which was significantly higher than all other powders (p < 0.001). Many nanopowders produced D values that were not significantly different from large-particle powders, such as Arizona Road Dust and bentonite clay. In general, fibrous nanopowders and powders with primary particles >100 nm are not as dusty as those containing granular, nano-sized primary particles. The method used here, incorporating an APS, represents a deviation from a standard method but resulted in dustiness values comparable to other standard methods. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Dust Environmental Monitoring Inhalation Exposure Occupational Health Particulate Matter Risk Assessment Safety
• Keywords:
  Airborne Dusts Air Samples Analytical Instruments Analytical Methods Author Keywords: Dustiness Dust Measurement Inhalants Measurement Equipment Nanoparticle Nanotechnology Particle Aerodynamics Particle Counters Particulate Dust Respirable Dust Risk Analysis Risk Assessment Sampling Methods Silicon Compounds Testing Equipment

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• ISSN:
  1545-9624
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  129-139
• Volume:
  9
• Issue:
  3
• NIOSHTIC Number:
  nn:20040483
• Citation:
  J Occup Environ Hyg 2012 Mar; 9(3):129-139
• Contact Point Address:
  Patrick O'Shaughnessy, Occupational and Environmental Health, College of Public Health, 100 Oakdale Campus, 137 IREH, Iowa City, IA 52242
• Email:
  patrick-oshaughnessy@uiowa.edu
• CAS Registry Number:
  Silica (CAS RN 7631-86-9)
• Federal Fiscal Year:
  2012
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• End Date:
  20080630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:52aef9af276eedd905076791ae3b0f06efe00641733930d0eb64eada0a2342f869aa0d0b92170fbec0aa711e9f4b619e32457f277d4f34cbb031277859ce9097
• Download URL:
  https://stacks.cdc.gov/view/cdc/193323/cdc_193323_DS1.pdf
• File Type:
  [PDF - 460.01 KB ]