Gas-Particle Partitioning and SOA Yields of Organonitrate Products from NO3-Initiated Oxidation of Isoprene under Varied Chemical Regimes

被引：18

作者：

Brownwood, Bellamy ^{[1
,2
]}

Turdziladze, Avtandil ^{[3
]}

Hohaus, Thorsten ^{[3
]}

Wu, Rongrong ^{[3
]}

Mentel, Thomas F. ^{[3
]}

Carlsson, Philip T. M. ^{[3
]}

Tsiligiannis, Epameinondas ^{[4
]}

Hallquist, Mattias ^{[4
]}

Andres, Stefanie ^{[3
]}

Hantschke, Luisa ^{[3
]}

Reimer, David ^{[3
]}

Rohrer, Franz ^{[3
]}

Tillmann, Ralf ^{[3
]}

Winter, Benjamin ^{[3
]}

Liebmann, Jonathan ^{[5
]}

Brown, Steven S. ^{[6
]}

Kiendler-Scharr, Astrid ^{[3
]}

Novelli, Anna ^{[3
]}

Fuchs, Hendrik ^{[3
]}

Fry, Juliane L. ^{[1
,2
]}

机构：

[1] Reed Coll, Chem Dept, Portland, OR 97202 USA

[2] Reed Coll, Environm Studies Program, Portland, OR 97202 USA

[3] Forschungszentrum Julich, Inst Energy & Climate IEK 8, D-52428 Julich, Germany

[4] Univ Gothenburg, Dept Chem & Mol Biol, S-40530 Gothenburg, Sweden

[5] Max Planck Inst Chem, Atmospher Chem Dept, D-55128 Mainz, Germany

[6] NOAA, Chem Sci Div, Earth Syst Res Lab, Boulder, CO 80305 USA

来源：

ACS EARTH AND SPACE CHEMISTRY | 2021年 / 5卷 / 04期

基金：

瑞典研究理事会; 欧盟地平线“2020”; 欧洲研究理事会;

关键词：

isoprene; nitrate; oxidation mechanism; peroxy radicals; gas-aerosol partitioning; secondary organic aerosol; SECONDARY ORGANIC AEROSOL; NITRATE RADICAL OXIDATION; RING-DOWN SPECTROMETER; NO3; CHEMISTRY; MODEL; N2O5;

D O I：

10.1021/acsearthspacechem.0c00311

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Alkyl nitrate (AN) and secondary organic aerosol (SOA) from the reaction of nitrate radicals (NO3) with isoprene were observed in the Simulation of Atmospheric PHotochemistry In a large Reaction (SAPHIR) chamber during the NO(3)Isop campaign in August 2018. Based on 15 day-long experiments under various reaction conditions, we conclude that the reaction has a nominally unity molar AN yield (observed range 90 +/- 40%) and an SOA mass yield of OA + organic nitrate aerosol of 13-15% (with similar to 50 mu g m(-3) inorganic seed aerosol and 2-5 mu g m-3 total organic aerosol). Isoprene (5-25 ppb) and oxidant (typically similar to 100 ppb O-3 and 5-25 ppb NO2) concentrations and aerosol composition (inorganic and organic coating) were varied while remaining close to ambient conditions, producing similar AN and SOA yields under all regimes. We observe the formation of dinitrates upon oxidation of the second double bond only once the isoprene precursor is fully consumed. We determine the bulk partitioning coefficient for ANs (K-p similar to 10(-3) m(3) mu g(-1)), indicating an average volatility corresponding to a C-5 hydroxy hydroperoxy nitrate.

引用

页码：785 / 800

页数：16

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