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Enhanced Sulfate Production by Nitrate Photolysis in the Presence of Halide Ions in Atmospheric Particles
Zhang, Ruifeng1; Gen, Masao1,2; Huang, Dandan3; Li, Yongjie4; Chan, Chak K.1
2020-04-07
Source PublicationEnvironmental Science and Technology
ABS Journal Level3
ISSN0013-936X
Volume54Issue:7Pages:3831-3839
Abstract

Heterogeneous oxidation of SO is an effective production pathway of sulfate in the atmosphere. We recently reported a novel pathway for the heterogeneous oxidation of SO by in-particle oxidants (OH, NO, and NO /HNO) produced from particulate nitrate photolysis (Environ. Sci. Technol. 2019, 53, 8757-8766). Particulate nitrate is often found to coexist with chloride and other halide ions, especially in aged sea-salt aerosols and combustion aerosols. Reactive uptake experiments of SO with UV-irradiated nitrate particles showed that sulfate production rates were enhanced by a factor of 1.4, 1.3, and 2.0 in the presence of Cl, Br, and I, respectively, compared to those in the absence of halide ions. The larger sulfate production was attributed to enhanced nitrate photolysis promoted by the increased incomplete solvation of nitrate at the air-particle interface due to the presence of surface-active halide ions. Modeling results based on the experimental data showed that the nitrate photolysis rate constants increased by a factor of 2.0, 1.7, and 3.7 in the presence of Cl, Br, and I, respectively. A linear relation was found between the nitrate photolysis rate constant, j, and the initial molar ratio of Cl to NO , [Cl]/[NO ], as j = 9.7 × 10[Cl]/[NO ] + 1.9 × 10 at [Cl]/[NO ] below 0.2. The present study demonstrates that the presence of halide ions enhances sulfate production produced during particulate nitrate photolysis and provides insights into the enhanced formation of in-particle oxidants that may increase atmospheric oxidative capacity.

DOI10.1021/acs.est.9b06445
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000526418000014
PublisherAMER CHEMICAL SOC1155 16TH ST, NW, WASHINGTON, DC 20036
Scopus ID2-s2.0-85083002790
Fulltext Access
FWCI1.7300922
Citation statistics
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorGen, Masao; Chan, Chak K.
Affiliation1.School of Energy and Environment, City University of Hong Kong, Kowloon, Tat Chee Avenue, Hong Kong
2.Faculty of Frontier Engineering, Institute of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
3.Shanghai Academy of Environmental Sciences, Shanghai, 920-1192, China
4.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, 999078, Macao
Recommended Citation
GB/T 7714
Zhang, Ruifeng,Gen, Masao,Huang, Dandan,et al. Enhanced Sulfate Production by Nitrate Photolysis in the Presence of Halide Ions in Atmospheric Particles[J]. Environmental Science and Technology,2020,54(7):3831-3839.
APA Zhang, Ruifeng,Gen, Masao,Huang, Dandan,Li, Yongjie,&Chan, Chak K..(2020).Enhanced Sulfate Production by Nitrate Photolysis in the Presence of Halide Ions in Atmospheric Particles.Environmental Science and Technology,54(7),3831-3839.
MLA Zhang, Ruifeng,et al."Enhanced Sulfate Production by Nitrate Photolysis in the Presence of Halide Ions in Atmospheric Particles".Environmental Science and Technology 54.7(2020):3831-3839.
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