Journal
RSC ADVANCES
Volume 12, Issue 33, Pages 21103-21109Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra02958h
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21607011]
- Key Research and Development Project of Shandong Province [2019GSF109021]
Ask authors/readers for more resources
This study investigates the heterogeneous OH oxidation mechanism of 3-methyltetraol sulfate (3-MTS), a common organic sulfate in atmospheric particles. The results show that 3-MTS easily undergoes abstraction reaction with OH radicals, generating low-volatility species that are important components of secondary organic aerosol. The study provides insights into the reactivity of other organosulfates in atmospheric aerosols and the conversion of sulfur between its organic and inorganic forms during oxidation.
Organosulfates (OSs), also known as organic sulfate esters, are ubiquitous in atmospheric particles and used as secondary organic aerosol (SOA) markers. However, the chemical transformation mechanism of these OSs remains unclear. Therefore, we investigated the heterogeneous OH oxidation of 3-methyltetraol sulfate (3-MTS), which is one of the most abundant particulate organosulfates, by using quantum chemical and kinetic calculations. 3-MTS can easily undergo abstraction reaction with OH radicals, and the reaction rate constant is about 7.87 x 10(-12) cm(3) per molecule per s. The generated HCOOH, CH3COOH, HCHO, CH3CHO and 2-methyl-2,3-dihydroxypropionic acid are low-volatility species with increased water solubility, which are the main components of SOA. In addition, the OH radicals obtained from the reaction can continue to promote the oxidation reaction. The results of this study provide insights into the heterogeneous OH reactivity of other organosulfates in atmospheric aerosols, and it also provides a new understanding of the conversion of sulfur (S) between its organic and inorganic forms during the heterogeneous OH oxidation of organic sulfates.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available