عنوان

Secondary Organic Aerosol Formation via 2-Methyl-3-buten-2-ol Photooxidation:

شماره

LA27r1v1fs

عنوان اصلي

Secondary Organic Aerosol Formation via 2-Methyl-3-buten-2-ol Photooxidation:

نام عام مواد

[Article]

نام نخستين پديدآور

Zhang, Haofei; Zhang, Zhenfa; Cui, Tianqu; Lin, Ying-Hsuan; Bhathela, Neil A; Ortega, John; Worton, David R; Goldstein, Allen H; Guenther, Alex; Jimenez, Jose L; Gold, Avram; Surratt, Jason D

عنوان اصلي به قلم نويسنده ديگر

Evidence of Acid-Catalyzed Reactive Uptake of Epoxides.

متن يادداشت

Secondary organic aerosol (SOA) formation from 2-methyl-3-buten-2-ol (MBO) photooxidation has recently been observed in both field and laboratory studies. Similar to the level of isoprene, the level of MBO-derived SOA increases with elevated aerosol acidity in the absence of nitric oxide; therefore, an epoxide intermediate, (3,3-dimethyloxiran-2-yl)methanol (MBO epoxide), was synthesized and tentatively proposed to explain this enhancement. In this study, the potential of the synthetic MBO epoxide to form SOA via reactive uptake was systematically examined. SOA was observed only in the presence of acidic aerosol. Major SOA constituents, 2,3-dihydroxyisopentanol and MBO-derived organosulfate isomers, were chemically characterized in both laboratory-generated SOA and in ambient fine aerosol collected from the BEACHON-RoMBAS field campaign during the summer of 2011, where MBO emissions are substantial. Our results support the idea that epoxides are potential products of MBO photooxidation leading to the formation of atmospheric SOA and suggest that reactive uptake of epoxides may explain acid enhancement of SOA observed from other biogenic hydrocarbons.

تاريخ نشر

2014

عنوان

UC Berkeley

نام الکترونيکي

نوع ماده

[Article]

کد کاربرگه

275578

سطح دسترسي

a

تكميل شده

Y