Title: | Budgets of Organic Carbon Composition and Oxidation in Indoor Air |
Author(s): | Price DJ; Day DA; Pagonis D; Stark H; Algrim LB; Handschy AV; Liu S; Krechmer JE; Miller SL; Hunter JF; de Gouw JA; Ziemann PJ; Jimenez JL; |
Address: | "Aerodyne Research Inc. , Billerica , Massachusetts 01821 , United States. Department of Civil and Environmental Engineering and Department of Materials Science and Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States" |
ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
Abstract: | "The chemical composition of indoor air at the University of Colorado, Boulder art museum was measured by a suite of gas- and particle-phase instruments. Over 80% of the total observed organic carbon (TOOC) mass (100 mug m(-3)) consisted of reduced compounds (carbon oxidation state, OS(C) < -0.5) with high volatility (log(10)?ª+C* > 7) and low carbon number (n(C) < 6). The museum TOOC was compared to other indoor and outdoor locations, which increased according to the following trend: remote < rural = urban < indoor = megacity. The museum TOOC was comparable to a university classroom and 3x less than residential environments. Trends in the total reactive flux were remote < indoor < rural < urban < megacity. High volatile organic compound (VOC) concentrations compensated low oxidant concentrations indoors to result in an appreciable reactive flux. Total hydroxyl radical (OH), ozone (O(3)), nitrate radical (NO(3)), and chlorine atom (Cl) reactivities for each location followed a similar trend to TOOC. High human occupancy events increased all oxidant reactivities in the museum by 65-125%. The lifetimes of O(3), NO(3), OH, and Cl reactivities were 13 h, 15 h, 23 days, and 189 days, respectively, corresponding to over 88% of indoor VOC oxidant reactivity being consumed outdoors after ventilation" |
Keywords: | "*Air Pollutants *Air Pollution, Indoor Carbon Environmental Monitoring Humans Ventilation *Volatile Organic Compounds;" |
Notes: | "MedlinePrice, Derek J Day, Douglas A Pagonis, Demetrios Stark, Harald Algrim, Lucas B Handschy, Anne V Liu, Shang Krechmer, Jordan E Miller, Shelly L Hunter, James F de Gouw, Joost A Ziemann, Paul J Jimenez, Jose L eng 2019/10/28 Environ Sci Technol. 2019 Nov 19; 53(22):13053-13063. doi: 10.1021/acs.est.9b04689. Epub 2019 Nov 8" |