Exposure and emissions monitoring during carbon nanofiber production - part II: polycyclic aromatic hydrocarbons

Details

• Personal Author:
  Birch, M. Eileen
• Description:
  Production of carbon nanofibers and nanotubes (CNFs/CNTs) and their composite products is increasing globally. High-volume production may increase the exposure risks for workers who handle these materials. Though health effects data for CNFs/CNTs are limited, some studies raise serious health concerns. Given the uncertainty about their potential hazards, there is an immediate need for toxicity data and field studies to assess exposure to CNFs/CNTs. An extensive study was conducted at a facility that manufactures and processes CNFs. Filter, sorbent, cascade impactor, bulk, and microscopy samples, combined with direct-reading instruments, provided complementary information on air contaminants. Samples were analyzed for organic and elemental carbon (OC and EC), metals, and polycyclic aromatic hydrocarbons (PAHs), with EC as a measure of CNFs. Transmission electron microscopy with energy-dispersive X-ray spectroscopy also was applied. Fine/ultrafine iron-rich soot, PAHs, and carbon monoxide were production byproducts. Direct-reading instrument results were reported previously [Evans DE et al. (Aerosol monitoring during carbon nanofiber production: mobile direct-reading sampling. Ann Occup Hyg 2010; 54:514-31)]. Results for time-integrated samples are reported as companion papers in this issue. OC and EC, metals, and microscopy results are reported in Part I (Birch et al., 2011), whereas results for PAHs are reported here. Naphthalene and acenaphthylene were the dominant PAHs with average concentrations ranging from 115 to 336 microg m-3 and 35 to 84 microg m-3, respectively. Concentrations of other PAHs ranged from approximately 1 to 10 microg m-3. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Air Pollution, Indoor Environmental Exposure Environmental Monitoring Hazardous Substances Hydrocarbons Manufacturing And Industrial Facilities Metals Occupational Health Particulate Matter Polycyclic Aromatic Hydrocarbons Risk Assessment Safety Spectrum Analysis

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• Keywords:
  Air-contamination Air-sampling Air-sampling-equipment Author Keywords: Carbon Nanofiber Biological-effects Hazardous-materials Industrial-exposures Industrial-hazards Microscopy Nanofibers Nanomaterial Nanotechnology Nanotube Nanotubes Occupational Exposure Polycyclic-aromatic-hydrocarbons Polycyclic Aromatic Hydrocarbon Risk-analysis Sampling Sampling-equipment Sampling-methods Spectrographic-analysis Spectroscopes Toxic-effects Toxic-materials Ultrafine-particles Ultrafine Aerosol

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• ISSN:
  0003-4878
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• 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:
  55
• Issue:
  9
• NIOSHTIC Number:
  nn:20039795
• Citation:
  Ann Occup Hyg 2011 Nov; 55(9):1037-1047
• Contact Point Address:
  M. Eileen Birch, Division of Applied Research and Technology, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, MS-R5, Cincinnati, OH 45226, USA
• Email:
  mib2@cdc.gov
• CAS Registry Number:
  Acenaphthylene (CAS RN 208-96-8) ; Carbon (CAS RN 7440-44-0) ; Iron (CAS RN 7439-89-6) ; Naphthalene (CAS RN 91-20-3)
• Federal Fiscal Year:
  2012
• NORA Priority Area:
  Manufacturing
• Peer Reviewed:
  True
• Source Full Name:
  Annals of Occupational Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:c7921ce534d4054d5052a110078fa8c71ea4a119643749aa05a592d0b6b4bdbbf8bd49f74049c62780868b816c9594be3ac7a63f20b1950e0bbf38307ccb7c6a
• Download URL:
  https://stacks.cdc.gov/view/cdc/192892/cdc_192892_DS1.pdf
• File Type:
  [PDF - 192.84 KB ]