Effect of industrial alkene ozonolysis on atmospheric H 2 SO 4 formation

This study has employed the master chemical mechanism (MCM) to investigate the influence of the ozone oxidation pathways in the atmospheric formation of H SO from short-chain olefins in industrialized areas. In-situ H SO formation data were obtained using a high-resolution chemical ionization time-o...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2025-04, Vol.150, p.466
Main Authors: Wang, Xing, Shi, Xiaowen, Jiang, Youling, Ma, Yan, Zheng, Jun
Format: Article
Language:English
Subjects:
Air Pollutants - chemistry
Alkenes - chemistry
Atmosphere - chemistry
Environmental Monitoring
Models, Chemical
Oxidation-Reduction
Ozone - chemistry
Sulfur Dioxide - chemistry
Sulfuric Acids - chemistry
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Summary:This study has employed the master chemical mechanism (MCM) to investigate the influence of the ozone oxidation pathways in the atmospheric formation of H SO from short-chain olefins in industrialized areas. In-situ H SO formation data were obtained using a high-resolution chemical ionization time-of-flight mass spectrometer, and the simulated H SO concentrations calculated using updated parameters for the MCM model exhibited good agreement with observations. In the simulation analysis of different reaction pathways involved in H SO formation, hydroxyl radicals were found to dominate H SO production during the daytime, while olefin ozone oxidation contributed up to 65% of total H SO production during the night-time. A sensitivity analysis of the H SO production parameters has revealed a high sensitivity to changes in sulfur dioxide, and a relatively high sensitivity to olefins with fast ozonolysis reaction rates and bimolecular reaction rates of resulting stabilized Criegee Intermediates. A high relative humidity promotes daytime H SO formation, but has an inhibiting effect during the night-time due to the different dominant reaction pathways.
ISSN:1001-0742