Nitrogen-containing organic aerosols and highly oxidized molecules produced by reaction of ozone with floor cleaning detergent

Gligorovski, Sasho Nitrogen-containing organic aerosols and highly oxidized molecules produced by reaction of ozone with floor cleaning detergent. Environmental Science: Atmospheres.

Text Xu et al., 2024.pdf - Published Version Download (778kB)

Abstract

Cleaning detergents are a source of numerous volatile organic compounds (VOCs) which are highly reactive
towards ozone leading to the formation of secondary organic aerosols (SOA) in indoor environments. Here
we perform real-time measurements of the organic composition of aerosols produced upon ozone
reaction with floor cleaning detergent by extractive electrospray ionization time-of-flight mass spectrometer
(EESI-TOF-MS) coupled to a chamber reactor. The experiments were performed in the absence of light and
under light irradiation (320 nm < l < 400 nm) simulating the fraction of sunlight that penetrates indoors. The
multiple increases in particle number concentrations correspond to rise in the signal intensity of specific
species. Notably, the secondary increase in particle mass concentration is mainly contributed by highly
oxidized molecules (HOMs), which increased from 16.5% upon ozone oxidation to 19.9% under photooxidation reactions. A large fraction of CHON compounds such as imidazole, pyrazine/pyrimidine, and
azaindole was observed most likely formed through the reaction of O3 with benzothiazole (constituent of
the cleaning detergent). The difference between the molecular compositions detected in the absence of
light and in the presence of light indicates that sunlight penetrating through the windows can affect the SOA
produced by the reaction of ozone with the floor cleaning detergent.

Item Type:	Article
Subjects:	Scientific Fields (Frascati) > Natural sciences > Earth and related environmental sciences
Divisions:	UKLO Network
Depositing User:	UKLO Mrezha
Date Deposited:	26 Nov 2024 09:12
Last Modified:	26 Nov 2024 09:12
URI:	https://eprints.uklo.edu.mk/id/eprint/10457

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