Effects of NOx and NH3 on the secondary organic aerosol formation from α-pinene photooxidation

Zhao, Yingqi1,2; Zhang, Zhaoyan1,2; Zhao, Ya1; Wang, Chong3,4; Xie, Hua1; Yang, Jiayue1; Zhang, Weiqing1; Wu, Guorong1; Li, Gang1; Jiang, Ling1,5; Yang, Xueming1,3,5,6,7

2024-11-15

10.1016/j.atmosenv.2024.120778

ATMOSPHERIC ENVIRONMENT   影响因子和分区

1352-2310

1873-2844

Understanding the effects of mixed anthropogenic pollutants on the photooxidation of volatile organic compounds (VOCs) is essential for unraveling the formation pathways of secondary organic aerosols (SOA). Yet, it remains a highly challenging experimental target owing to the complexities in the precise measurement of molecular compositions of products and number/mass concentrations of particles as a function of pollutant concentration in the ambient atmosphere. Here, a series of well-defined chamber experiments were performed to explore the effects of NOx x and NH3 3 on the SOA formation from photooxidation of the most abundant monoterpene, alpha-pinene. The results indicate that the suppression effect of NO and NO2 2 on the alpha-pinene photooxidation shows monotonous and parabolic trends, respectively. The presence of NH3 3 enhances particle number concentrations during the alpha-pinene + NOx x photooxidation by participating in reactions with organic acids. New compounds, including organic peroxides, esters, organic nitrates, and peroxyacyl nitrates, are observed at molecular weight (MW) = 166, 173, 217, 231, 280, 282, 304, and 410 through threshold photoionization making use of a recently constructed vacuum ultraviolet free electron laser in positive ion mode. The molecular structures and formation paths of these species are speculated, which advance the category of VOC oxidation products. Our study provides significant understanding of the influence of NOx x and NH3 3 on the VOC photooxidation, which can be utilized to establish predictive SOA formation networks and to improve atmospheric models.

Anthropogenic-biogenic interactions Secondary organic aerosol Volatile organic compound Photooxidation mechanism alpha-pinene

SCI ; EI

英语

其他

National Natural Science Foundation of China["22125303","92361302","92061203","22103082","22273101","22288201","21327901"] ; National Key Research and Development Program of China[2021YFA1400501] ; Innovation Program for Quantum Science and Technology[2021ZD0303304] ; Dalian Institute of Chemical Physics[DICP I202437] ; Chinese Academy of Sciences[GJJSTD20220001] ; International Partnership Program of CAS[121421KYSB20170012]

Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences

Environmental Sciences ; Meteorology & Atmospheric Sciences

WOS:001301845400001

PERGAMON-ELSEVIER SCIENCE LTD

GEOSCIENCES

Web of Science

1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam & Dalian Coherent Li, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Inst Adv Sci Facil, Shenzhen 518107, Peoples R China
4.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China
5.Hefei Natl Lab, Hefei 230088, Peoples R China
6.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
7.Southern Univ Sci & Technol, Guangdong Prov Key Lab Catalyt Chem, Shenzhen 518055, Peoples R China

Zhao, Yingqi,Zhang, Zhaoyan,Zhao, Ya,et al. Effects of NOx and NH3 on the secondary organic aerosol formation from α-pinene photooxidation[J]. ATMOSPHERIC ENVIRONMENT,2024,337.

Zhao, Yingqi.,Zhang, Zhaoyan.,Zhao, Ya.,Wang, Chong.,Xie, Hua.,...&Yang, Xueming.(2024).Effects of NOx and NH3 on the secondary organic aerosol formation from α-pinene photooxidation.ATMOSPHERIC ENVIRONMENT,337.

Zhao, Yingqi,et al."Effects of NOx and NH3 on the secondary organic aerosol formation from α-pinene photooxidation".ATMOSPHERIC ENVIRONMENT 337(2024).