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Environ Sci Process Impacts

Title:		Formation pathways of aldehydes from heated cooking oils
Author(s):		Takhar M; Li Y; Ditto JC; Chan AWH;
Address:		"Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, M5S 3E5, Canada. College of Science, Sichuan Agricultural University, Ya'an, 625014, China"
Journal Title:		Environ Sci Process Impacts
Year:		2023
Volume:		20230222
Issue:		2
Page Number:		165 - 175
DOI:		10.1039/d1em00532d
ISSN/ISBN:		2050-7895 (Electronic) 2050-7887 (Linking)
Abstract:		"Cooking emissions account for a major fraction of urban volatile organic compounds and organic aerosol. Aldehyde species, in particular, are important exposure hazards in indoor residential and occupational environments, and precursors to particulate matter and ozone formation in outdoor air. Formation pathways of aldehydes from oils that lead to their emissions are not well understood. In this work, we investigate the underlying mechanisms involved in the formation of aldehydes from heated cooking oil emissions, through studying how antioxidants and oil composition modulate oxidation chemistry. Our results demonstrate that gaseous emissions are driven by radical-mediated autoxidation reactions in cooking oil, and the composition of cooking oils strongly influences the reaction mechanisms. Antioxidants have a dual effect on aldehyde emissions depending on the rates of radical propagation reactions. We propose a mechanistic framework that can be used to understand and predict cooking emissions under different cooking conditions. Our results highlight the need to understand the rates and mechanisms of autoxidation and other reactions in cooking oils in order to accurately predict the gas- and particle-phase emissions from food cooking in urban atmospheres"
Keywords:		"*Air Pollutants/analysis Aldehydes/analysis Oils Particulate Matter Cooking/methods *Air Pollution, Indoor/analysis Environmental Monitoring/methods;"
Notes:		"MedlineTakhar, Manpreet Li, Yunchun Ditto, Jenna C Chan, Arthur W H eng England 2022/02/24 Environ Sci Process Impacts. 2023 Feb 22; 25(2):165-175. doi: 10.1039/d1em00532d"