| Title: | Synergistic Effects of SO(2) and NH(3) Coexistence on SOA Formation from Gasoline Evaporative Emissions |
| Author(s): | Chen T; Zhang P; Chu B; Ma Q; Ge Y; He H; |
| Address: | "State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. University of Chinese Academy of Sciences, Beijing 100049, China. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Innovation Center for Engineering Science and Advanced Technology, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Vehicular evaporative emissions make an increasing contribution to anthropogenic sources of volatile organic compounds (VOCs), thus contributing to secondary organic aerosol (SOA) formation. However, few studies have been conducted on SOA formation from vehicle evaporative VOCs under complex pollution conditions with the coexistence of NO(x), SO(2), and NH(3). In this study, the synergistic effects of SO(2) and NH(3) on SOA formation from gasoline evaporative VOCs with NO(x) were examined using a 30 m(3) smog chamber with the aid of a series of mass spectrometers. Compared with the systems involving SO(2) or NH(3) alone, SO(2) and NH(3) coexistence had a greater promotion effect on SOA formation, which was larger than the cumulative effect of the two promotions alone. Meanwhile, contrasting effects of SO(2) on the oxidation state (OSc) of SOA in the presence or absence of NH(3) were observed, and SO(2) could further increase the OSc with the coexistence of NH(3). The latter was attributed to the synergistic effects of SO(2) and NH(3) coexistence on SOA formation, wherein N-S-O adducts can be formed from the reaction of SO(2) with N-heterocycles generated in the presence of NH(3). Our study contributes to the understanding of SOA formation from vehicle evaporative VOCs under highly complex pollution conditions and its atmospheric implications" |
| Keywords: | Gasoline Aerosols/analysis Vehicle Emissions/analysis *Volatile Organic Compounds/analysis Environmental Pollution *Air Pollutants/analysis ammonia secondary organic aerosol sulfur dioxide synergistic effects vehicular evaporation emissions; |
| Notes: | "MedlineChen, Tianzeng Zhang, Peng Chu, Biwu Ma, Qingxin Ge, Yanli He, Hong eng Research Support, Non-U.S. Gov't 2023/04/14 Environ Sci Technol. 2023 Apr 25; 57(16):6616-6625. doi: 10.1021/acs.est.3c01921. Epub 2023 Apr 13" |
