| Title: | Influence of Mechanical Ventilation Systems and Human Occupancy on Time-Resolved Source Rates of Volatile Skin Oil Ozonolysis Products in a LEED-Certified Office Building |
| Author(s): | Wu T; Tasoglou A; Huber H; Stevens PS; Boor BE; |
| Address: | "Lyles School of Civil Engineering, Purdue University, West Lafayette, Indiana 47907, United States. Ray W. Herrick Laboratories, Center for High Performance Buildings, Purdue University, West Lafayette, Indiana 47907, United States. RJ Lee Group Incorporated, Monroeville, Pennsylvania 15146, United States. Edelweiss Technology Solutions, Limited Liability Company, Novelty, Ohio 44072, United States. O'Neill School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405, United States. Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Building mechanical ventilation systems are a major driver of indoor air chemistry as their design and operation influences indoor ozone (O(3)) concentrations, the dilution and transport of indoor-generated volatile organic compounds (VOCs), and indoor environmental conditions. Real-time VOC and O(3) measurements were integrated with a building sensing platform to evaluate the influence of mechanical ventilation modes and human occupancy on the dynamics of skin oil ozonolysis products (SOOPs) in an office in a LEED-certified building during the winter. The ventilation system operated under variable recirculation ratios (RRs) from RR = 0 (100% outdoor air) to RR = 1 (100% recirculation air). Time-resolved source rates for 6-methyl-5-hepten-2-one (6-MHO), 4-oxopentanal (4-OPA), and decanal were highly dynamic and changed throughout the day with RR and occupancy. Total SOOP source rates during high-occupancy periods (10:00-18:00) varied from 2500-3000 mug h(-1) when RR = 0.1 to 6300-6700 mug h(-1) when RR = 1. Source rates for gas-phase reactions, outdoor air, and occupant-associated emissions generally decreased with increasing RR. The recirculation air source rate increased with RR and typically became the dominant source for RR > 0.5. SOOP emissions from surface reservoirs were also a prominent source, contributing 10-50% to total source rates. Elevated per person SOOP emission factors were observed, potentially due to multiple layers of soiled clothing worn during winter" |
| Keywords: | "*Air Pollutants/analysis *Air Pollution, Indoor/analysis Environmental Monitoring Humans *Oils, Volatile *Ozone/analysis Respiration, Artificial Ventilation *Volatile Organic Compounds high-performance buildings indoor air quality ozone chemistry proton t;" |
| Notes: | "MedlineWu, Tianren Tasoglou, Antonios Huber, Heinz Stevens, Philip S Boor, Brandon E eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2021/12/02 Environ Sci Technol. 2021 Dec 21; 55(24):16477-16488. doi: 10.1021/acs.est.1c03112. Epub 2021 Dec 1" |
