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Environ Sci Technol

Title:		The Effect of Human Occupancy on Indoor Air Quality through Real-Time Measurements of Key Pollutants
Author(s):		Deng H; Xu X; Wang K; Xu J; Loisel G; Wang Y; Pang H; Li P; Mai Z; Yan S; Li X; Gligorovski S;
Address:		"State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou510640, China. University of Chinese Academy of Sciences, Beijing100864, China. Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou510632, China. Guangzhou Hexin Instrument Co., Ltd., Guangzhou510530, China. Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution, Guangzhou510632, China. Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou510632, China. Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou510640, China. Chinese Academy of Science, Center for Excellence in Deep Earth Science, Guangzhou510640, China"
Journal Title:		Environ Sci Technol
Year:		2022
Volume:		20221024
Issue:		22
Page Number:		15377 - 15388
DOI:		10.1021/acs.est.2c04609
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"The primarily emitted compounds by human presence, e.g., skin and volatile organic compounds (VOCs) in breath, can react with typical indoor air oxidants, ozone (O(3)), and hydroxyl radicals (OH), leading to secondary organic compounds. Nevertheless, our understanding about the formation processes of the compounds through reactions of indoor air oxidants with primary emitted pollutants is still incomplete. In this study we performed real-time measurements of nitrous acid (HONO), nitrogen oxides (NO(x) = NO + NO(2)), O(3), and VOCs to investigate the contribution of human presence and human activity, e.g., mopping the floor, to secondary organic compounds. During human occupancy a significant increase was observed of 1-butene, isoprene, and d-limonene exhaled by the four adults in the room and an increase of methyl vinyl ketone/methacrolein, methylglyoxal, and 3-methylfuran, formed as secondary compounds through reactions of OH radicals with isoprene. Intriguingly, the level of some compounds (e.g., m/z 126, 6-methyl-5-hepten-2-one, m/z 152, dihydrocarvone, and m/z 194, geranyl acetone) formed through reactions of O(3) with the primary compounds was higher in the presence of four adults than during the period of mopping the floor with commercial detergent. These results indicate that human presence can additionally degrade the indoor air quality"
Keywords:		"Humans *Air Pollution, Indoor/analysis *Environmental Pollutants *Ozone/analysis *Air Pollutants/analysis *Volatile Organic Compounds Oxidants OH radical VOCs emission rates indoor environment mass spectrometry ozone;"
Notes:		"MedlineDeng, Huifan Xu, Xin Wang, Kangyi Xu, Jinli Loisel, Gwendal Wang, Yiqun Pang, Hongwei Li, Pan Mai, Zebin Yan, Shichao Li, Xue Gligorovski, Sasho eng Research Support, Non-U.S. Gov't 2022/10/25 Environ Sci Technol. 2022 Nov 15; 56(22):15377-15388. doi: 10.1021/acs.est.2c04609. Epub 2022 Oct 24"