Novel active personal nanoparticle sampler for the exposure assessment of nanoparticles in workplaces

Details

• Personal Author:
  Chen S-C ; Cheng Y-S ; Hung S-M ; Liu C-N ; Tsai C-J ; Uang S-N ; Zhou Y
• Description:
  A novel active personal nanoparticle sampler (PENS), which enables the collection of both respirable particulate mass (RPM) and nanoparticles (NPs) simultaneously, was developed to meet the critical demand for personal sampling of engineered nanomaterials (ENMs) in workplaces. The PENS consists of a respirable cyclone and a micro-orifice impactor with the cutoff aerodynamic diameter (dpa50) of 4 um and 100 nm, respectively. The micro-orifice impactor has a fixed micro-orifice plate (137 nozzles of 55 um in the inner diameter) and a rotating, silicone oil-coated Teflon filter substrate at 1 rpm to achieve a uniform particle deposition and avoid solid particle bounce. A final filter is used after the impactor to collect the NPs. Calibration results show that the dpa50 of the respirable cyclone and the micro-orifice impactor are 3.92 +/- 0.22 um and 101.4 +/- 0.1 nm, respectively. The dpa50 at the loaded micro-Al2O3 mass of 0.36.3.18 mg is shifted to 102.9.101.2 nm, respectively, while it is shifted to 98.9.97.8 nm at the loaded nano-TiO2 mass of 0.92.1.78 mg, respectively. That is, the shift of dpa50 due to solid particle loading is small if the PENS is not overloaded. Both NPs and RPM concentrations were found to agree well with those of the IOSH respirable cyclone and MOUDI. By using the present PENS, the collected samples can be further analyzed for chemical species concentrations besides gravimetric analysis to determine the actual exposure concentrations of ENMs in both RPM and NPs fractions in workplaces, which are often influenced by the background or incident pollution sources. [Description provided by NIOSH]
• Subjects:
  Irritants Occupational Health Particulate Matter Respiratory Tract Diseases Risk Assessment Risk Factors Safety Workplace
• Keywords:
  Exposure-levels Filters Monitoring-systems Nanotechnology Particulates Pollutants Respiratory-irritants Respiratory-system-disorders Risk-factors Samplers Sampling Work-environment Workers

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• ISSN:
  0013-936X
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New Mexico ; OSHA Region 6
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  46
• Issue:
  8
• NIOSHTIC Number:
  nn:20046128
• Citation:
  Environ Sci Technol 2012 Apr; 46(8):4546-4552
• Contact Point Address:
  Chuen-Jinn Tsai, Institute of Environmental Engineering, National Chiao Tung University (NCTU), Hsinchu, 1001 University Road, 30010, Taiwan
• Email:
  cjtsai@mail.nctu.edu.tw
• Federal Fiscal Year:
  2012
• Performing Organization:
  Lovelace Biomedical & Environmental Research, Albuquerque, New Mexico
• Peer Reviewed:
  True
• Start Date:
  20100901
• Source Full Name:
  Environmental Science and Technology
• End Date:
  20140831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ec46ef106c8500393303dc54126ec7e48035c7fe6af8cd494c0f272362a474a97bcfd2d5278017820effcacef41a2118af2331f572271eb4c2cf2db9e73ab5f0
• Download URL:
  https://stacks.cdc.gov/view/cdc/201266/cdc_201266_DS1.pdf
• File Type:
  [PDF - 3.41 MB ]