Assessing Residential Indoor and Outdoor Bioaerosol Characteristics Using the Ultraviolet Light-Induced Fluorescence-Based Wideband Integrated Bioaerosol Sensor

Details

• Personal Author:
  Addor YS ; Baumgardner D ; Hughes D ; Jandarov R ; Newman N ; Reponen T
• Description:
  We assessed and compared indoor and outdoor residential aerosol particles in a third-floor apartment from August through September 2020. The measurements were conducted using a direct-reading ultraviolet light-induced fluorescence (UV-LIF) wideband integrated bioaerosol spectrometer (WIBS). It measures individual particle light scattering and fluorescence from which particle properties can be derived. The number concentrations of total aerosol particles (TAP) and total fluorescent aerosol particles (TFAP) were significantly higher indoors. Daily and hourly TFAP mean concentrations followed the same trends as the TAP, both indoors and outdoors. The daily mean rank of the TFAP fraction (TFAP/TAP) was significantly higher indoors (23%) than outdoors (19%). Particles representing bacteria dominated indoors while particles representing fungi and pollen dominated outdoors. The mean volume-weighted median diameters for TFAP were 1.67 µm indoors and 2.09 µm outdoors. Higher TFAP fraction indoors was likely due to occupants' activities that generated or resuspended particles. This study contributes to understanding the characteristics of residential aerosol particles in situations when occupants spend most of their time indoors. Based on our findings, a large portion of all indoor aerosol particles could be biological (15-20%) and of respirable particle size (≥95%). Using a novel direct reading UV-LIF-based sensor can help quickly assess aerosol exposures relevant to human health. [Description provided by NIOSH]
• Subjects:
  Aerosols Environmental Exposure Fungi Occupational Health Safety
• Keywords:
  Aerosol Particles Bacteria Bioaerosols Environmental Exposure Indoor Environments Outdoors Sensors Ultraviolet Spectrometry
• ISSN:
  2050-7887
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; Ohio ; OSHA Region 5 ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  24
• Issue:
  10
• NIOSHTIC Number:
  nn:20067822
• Citation:
  Environ Sci Process Impacts 2022 Oct; 24(10):1790-1804
• Contact Point Address:
  Tiina Reponen, University of Cincinnati, Department of the Environmental and Public Health Sciences, Cincinnati, OH, USA
• Email:
  Tiina.Reponen@uc.edu
• Federal Fiscal Year:
  2023
• Performing Organization:
  University of Cincinnati
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Environmental Science: Processes & Impacts
• End Date:
  20260630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:70440f02d3663b0ca121b6bd3c79ec8e4e29d44dea1d25670c44d6477152b4bf7c7aa4ce327078923035ff64fc5831a5baedc964a935bcc1a90d5f483ce5184a
• Download URL:
  https://stacks.cdc.gov/view/cdc/230077/cdc_230077_DS1.pdf
• File Type:
  [PDF - 1.88 MB ]