Increased primary and secondary H<sub>2</sub>SO<sub>4</sub> showing the opposing roles in secondary organic aerosol formation from ethyl methacrylate ozonolysis
نویسندگان
چکیده
Abstract. Stressed plants and polymer production can emit many unsaturated volatile organic esters (UVOEs). However, secondary aerosol (SOA) formation of UVOEs remains unclear, especially under complex ambient conditions. In this study, we mainly investigated ethyl methacrylate (EM) ozonolysis. Results showed that a substantial increase in H2SO4 particles promoted SOA with increasing SO2. An important reason was the homogeneous nucleation more at high SO2 level provided greater surface area volume for condensation. increased primary seed acidity enhanced EM uptake but reduced formation. This ascribed to fact ozonolysis adsorbed hampered higher particle acidity. Moreover, via favored oligomerization oxidation products, whereas presence tended promote functionalization conversion products. study indicated role EM-derived may not be same different conditions, which helps advance our understanding complicated roles SOA.
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ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2021
ISSN: ['1680-7316', '1680-7324']
DOI: https://doi.org/10.5194/acp-21-7099-2021