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Title: | Emission characteristics, sources, and airborne fate of speciated organics in particulate matters in a Hong Kong residence | Authors: | Huo, Y Guo, H Lyu, X Yao, D |
Issue Date: | Mar-2022 | Source: | Indoor air, Mar. 2022, v. 32, no. 3, e13017 | Abstract: | A growing number of studies warn of the adverse health effects of indoor particulate matters (PM). However, little is known about the molecular compositions and emission characteristics of PM-bound organics (OM) indoors, a critical group of species with highest concentration and complexity in indoor PM. In a Hong Kong residence where prescribed activities were performed with normal frequency and intensity, we found that the activities significantly elevated not only the total concentration but also the fraction of OM in indoor PM. However, the concentration of the total PM-bound OM outdoors (10.3 ± 0.7 μg/m3) surpassed that for the indoor counterpart during the undisturbed period (8.2 ± 0.1 μg/m3), that is, period when there was no activity with high emission of PM but the residual effects of previous activities might remain. Emissions of indoor activities involving combustion or high-temperature processes significantly elevated the indoor-to-outdoor (I/O) ratios for a majority of organic species. In addition, gas-to-particle partitioning, secondary formation, carrying-over (residues of pollutants in the air), and re-emission also modulated the I/O ratios of some compounds. Chemically comprehensive emission profiles of speciated organics were obtained for 5 indoor activities in the residence. While the indoor contribution to PM-bound OM was estimated to be not higher than 13.1% during the undisturbed period, carrying-over and/or re-emission seemed to exist for certain compounds emitted from cigarette smoking and incense burning. This study enhances knowledge on emissions and airborne fate of speciated organics in indoor PM. | Keywords: | Emission profile Indoor air quality Indoor-to-outdoor ratio Organic compounds Particulate matters |
Publisher: | Wiley-Blackwell | Journal: | Indoor air | ISSN: | 0905-6947 | EISSN: | 1600-0668 | DOI: | 10.1111/ina.13017 | Rights: | © 2022 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. This is the peer reviewed version of the following article: Huo, Y, Guo, H, Lyu, X, Yao, D. Emission characteristics, sources, and airborne fate of speciated organics in particulate matters in a Hong Kong residence. Indoor Air. 2022; 32:e13017, which has been published in final form at https://doi.org/10.1111/ina.13017. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Appears in Collections: | Journal/Magazine Article |
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Huo_Emission_Characteristics_Sources.pdf | Pre-Published version | 1.15 MB | Adobe PDF | View/Open |
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