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Environ Sci Technol

Title:		Henry's Law Constants and Indoor Partitioning of Microbial Volatile Organic Compounds
Author(s):		Wu S; Hayati SK; Kim E; de la Mata AP; Harynuk JJ; Wang C; Zhao R;
Address:		"Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada. School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China"
Journal Title:		Environ Sci Technol
Year:		2022
Volume:		20220506
Issue:		11
Page Number:		7143 - 7152
DOI:		10.1021/acs.est.1c07882
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Microbial volatile organic compounds (MVOCs) play an essential role in many environmental fields, such as indoor air quality. Long-term exposure to odorous and toxic MVOCs can negatively affect the health of occupants. Recently, the involvement of surface reservoirs in indoor chemistry has been realized, which signifies the importance of the phase partitioning of volatile organic pollutants. However, reliable partition coefficients of many MVOCs are currently lacking. Equilibrium partition coefficients, such as Henry's law constant, H, are crucial for understanding the environmental behavior of chemicals. This study aims to experimentally determine the H values and their temperature dependence for key MVOCs under temperature relevant to the indoor environment. The H values were determined with the inert gas-stripping (IGS) method and variable phase ratio headspace (VPR-HS) technique. A two-dimensional partitioning model was applied to predict the indoor phase distribution of MVOCs and potential exposure pathways to the residences. The findings show that the MVOCs are likely distributed between the gas and weakly polar (e.g., organic-rich) reservoirs indoors. Temperature and the volume of reservoirs can sensitively affect indoor partitioning. Our results give a more comprehensive view of indoor chemical partitioning and exposure"
Keywords:		"*Air Pollution, Indoor/analysis Temperature *Volatile Organic Compounds/chemistry Henry's law constant chemical exposure chemical partitioning equilibrium partitioning indoor air quality indoor environment microbial volatile organic compounds;"
Notes:		"MedlineWu, Shuang Hayati, Siti K Kim, Erica de la Mata, A Paulina Harynuk, James J Wang, Chen Zhao, Ran eng Research Support, Non-U.S. Gov't 2022/05/07 Environ Sci Technol. 2022 Jun 7; 56(11):7143-7152. doi: 10.1021/acs.est.1c07882. Epub 2022 May 6"