Characterization of HVAC Filter Cake Composition and Ozone-Initiated Heterogeneous Chemistry

Details

• Personal Author:
  Apte MG ; Destaillats H ; Fisk WJ ; Gundel LA ; Lunden MM ; Sidheswaran MA ; Williams RN
• Description:
  The major goals of this study were to identify key organic constituents of particles deposited on heating ventilation and air conditioning (HVAC) filters and better understand the chemical mechanisms that contribute to negative impacts of building filtration systems on indoor air quality. Several types of filter media were investigated: fiberglass, polyester and cotton/polyester blend, each as unused and loaded for 3 months at two locations in the San Francisco Bay Area (California). Extracts of used filters were analyzed by gas chromatographyion trap tandem mass spectroscopy. Among other compounds, the extracts contained terpene alcohols and their reaction byproducts, amides, phthalates and aromatic hydrocarbons. Sources of these compounds and their precursors include vegetation, occupant activities, emissions from indoor materials and urban pollution. To investigate heterogeneous reactions that could occur in ventilation systems, clean and used filters were mounted in a Teflon plugflow reactor and spiked with a model pollutant (aterpineol) before exposure to ozone (approx. 150 ppb). Reaction products were identified downstream. Aerosol number size distribution was also monitored over the particle size range of 10 to 400 nm. Under some conditions, ozone reactions on the filters or with gas phase products generated ultrafine particles. [Description provided by NIOSH]
• Subjects:
  Air Pollution, Indoor Occupational Health Ozone Safety Ventilation
• Keywords:
  A-terpineol Air Filters Author Keywords: HVAC Filters Filter Cake Filter Materials Indoor Air Pollution Indoor Environments Terpenoids Ventilation Systems
• ISBN:
  9781627482721
• Publisher:
  International Society of Indoor Air Quality and Climate (ISIAQ)
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Proceedings
• Place as Subject:
  Alabama ; Arizona ; California ; OSHA Region 4 ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20057273
• Citation:
  Proceedings of Indoor Air '11, The 12th International Conference on Indoor Air Quality and Climate, June 5-10, 2011, Austin, Texas. Santa Cruz, CA: International Society of Indoor Air Quality and Climate (ISIAQ), 2011 Jun; 1:2565-2570
• Contact Point Address:
  Hugo Destaillats, Lawrence Berkeley National Laboratory, Berkeley, CA
• Email:
  HDestaillats@lbl.gov
• CAS Registry Number:
  Ozone (CAS RN 10028-15-6)
• Federal Fiscal Year:
  2011
• NORA Priority Area:
  Healthcare and Social Assistance ; Manufacturing
• Performing Organization:
  University of California-Lawrence Berkeley Laboratory
• Peer Reviewed:
  False
• Start Date:
  20090915
• Source Full Name:
  Proceedings of Indoor Air '11, The 12th International Conference on Indoor Air Quality and Climate, June 5-10, 2011, Austin, Texas
• End Date:
  20120914
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:2df718e6f476719224e03e1b2cb1e7a8aad977ed5bd2c0967dd2bf5f04b2c7f30b5b9cb749b0098203ebeccba527a10116e0430980232b792c73f20425bf87c3
• Download URL:
  https://stacks.cdc.gov/view/cdc/214675/cdc_214675_DS1.pdf
• File Type:
  [PDF - 97.96 KB ]