Dynamics of Residential Indoor Gas- and Particle-phase Water-soluble Organic Carbon: Measurements During the CASA Experiment.

Details

• Alternative Title:
  Environmental Science. Processes & Impacts, 2025, v. 27, no. 6: Dynamics of Residential Indoor Gas- and Particle-phase Water-soluble Organic Carbon: Measurements During the CASA Experiment.
• Journal Article:
  Environmental Science. Processes & Impacts
• Personal Author:
  Webb, Marc ; Morrison, Glenn ; Baumann, Karsten ; Li, Jienan ; Ditto, Jenna C. ; Huynh, Han N. ; Yu, Jie ; Mayer, Kathryn ; Mael, Liora ; Vance, Marina E. ; Farmer, Delphine K. ; Abbatt, Jonathan ; Poppendieck, Dustin ; Turpin, Barbara J.
• Description:
  Previous time-integrated (2 h to 4 h) measurements show that total gas-phase water-soluble organic carbon (WSOC
  
  ) is 10 to 20 times higher inside homes compared to outside. However, concentration dynamics of WSOC
  
  and total particle phase WSOC (WSOC
  
  )-are not well understood. During the Chemical Assessment of Surfaces and Air (CASA) experiment, we measured concentration dynamics of WSOC
  
  and WSOC
  
  inside a residential test facility in the house background and during scripted activities. A total organic carbon (TOC) analyzer pulled alternately from a particle-into-liquid sampler (PILS) or a mist chamber (MC). WSOC
  
  concentrations (215 ± 29 μg-C m
  
  ) were generally 36× higher than WSOC
  
  (6 ± 3 μg-C m
  
  ) and 20× higher than outdoor levels. A building-specific emission factor (
  
  ) of 31 mg-C h
  
  maintained the relatively high house WSOC
  
  background, which was dominated by ethanol (46 μg-C m
  
  to 82 μg-C m
  
  ). When we opened the windows, WSOC
  
  decayed slower (2.8 h
  
  ) than the air change rate (21.2 h
  
  ) and
  
  increased (243 mg-C h
  
  ). The response (increased
  
  ) suggests WSOC
  
  concentrations are regulated by large near surface reservoirs rather than diffusion through surface materials. Cooking and ozone addition had a small impact on WSOC, whereas surface cleaning, volatile organic compound (VOC) additions, or wood smoke injections had significant impacts on WSOC concentrations. WSOC
  
  concentration decay rates from these activities (0.4 h
  
  to 4.0 h
  
  ) were greater than the normal operating 0.24 h
  
  air change rate, which is consistent with an important role for surface removal.
• Content Notes:
  Author manuscript
• Subjects:
  • Air Pollution, Indoor
  • Environmental Monitoring
  • Carbon
  • Air Pollutants
  • Particulate Matter
  • Housing
• Source:
  Environmental Science. Processes & Impacts, 2025, v. 27, no. 6
• DOI:
  https://doi.org/10.1039/d4em00340c
• ISSN:
  2050-7887 ; 2050-7895
• Pubmed ID:
  39373709
• Pubmed Central ID:
  PMC11973229
• Document Type:
  Text
• Funding:
  T42 OH008673/OH/NIOSH CDC HHSUnited States/
• Genre:
  Journal Article
• Pages in Document:
  1535-1550 (29 pdf pages)
• Volume:
  27
• Issue:
  6
• Download URL:
  https://stacks.cdc.gov/view/cdc/261992/cdc_261992_DS1.pdf
• File Type:
  [PDF - 1.22 MB]
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha-512:454d07a1f1971d9a04766e5e01f1bbdfb64f2858dfaa745b72ff092afae47d5f7c2cda06201b3ba7d2c69e06da02235ea234614cc0297db26d020b7a251796ad