Performance of Wearable Ionization Air Cleaners: Ozone Emission and Particle Removal

Details

• Personal Author:
  Lee ES ; Shi S ; Zhao B ; Zhu S ; Zhu Y
• Description:
  Wearable ionization air cleaners are compact in size and marketed for personal respiratory protection by removing air pollutants from users' breathing zone. In this study, ozone emission and particle removal rates of four wearable ionization air cleaners (namely, AC1 through AC4) were evaluated inside a 0.46 m3 stainless steel chamber. Continuous measurements were conducted for ozone concentration, PM2.5 concentration, and particle size distribution in the size range of 18.1-289 nm. Two of the four wearable air cleaners (i.e., AC1 and AC2) had detectable ozone emissions. The 10-h average ozone emission rates were quite different (i.e., 0.67 mg·h-1 for AC1 and 3.40 × 10-2 mg·h-1 for AC2); however, the ozone emissions were negligible for AC3 and AC4. The number removal rates for particles within the measured size range were highly variable (i.e., 2.20 h-1, 0.52 h-1, 8.10 h-1, and 27.9 h-1 for AC1 through AC4, respectively). The corresponding mass removal rates of PM2.5 were 1.85 h-1, 0.48 h-1,1.52 h-1, and 5.37 h-1, respectively. Regulatory guidelines are needed to assure these devices can effectively remove particles without ozone emissions to protect public health. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Occupational Health Ozone Safety
• Keywords:
  Air Cleaning Air Pollutants Breathing Zone Emission Sources Ionization Wearable Technologies
• ISSN:
  0278-6826
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  California ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  211-221
• Volume:
  50
• Issue:
  3
• NIOSHTIC Number:
  nn:20055755
• Citation:
  Aerosol Sci Technol 2016 Mar; 50(3):211-221
• Contact Point Address:
  Bin Zhao, Department of Building Science, School of Architecture, Tsinghua University Beijing 100084, P.R. China
• Email:
  binzhao@tsinghua.edu.cn
• Federal Fiscal Year:
  2016
• Performing Organization:
  University of California Los Angeles
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Aerosol Science and Technology
• End Date:
  20270630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:75ab87531d986e848b5241268956b731c192b09a3a8f424c16f4ac66c9837e1806c3bba098c04aec132c3b7645cd466b635ba78735f1735912c76d090588a840
• Download URL:
  https://stacks.cdc.gov/view/cdc/213534/cdc_213534_DS1.pdf
• File Type:
  [PDF - 956.29 KB ]