Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of α-pinene in environmental chamber experiments
Item
Title (Dublin Core)
Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of α-pinene in environmental chamber experiments
Description (Dublin Core)
Gas–particle partitioning and hydrolysis of organic nitrates (ON) influences their role as sinks and sources of NO<sub><i>x</i></sub> and their effects on the formation of tropospheric ozone and organic aerosol (OA). In this work, organic nitrates were formed from the photo-oxidation of <i>α</i>-pinene in environmental chamber experiments under different conditions. Particle-phase ON hydrolysis rates, consistent with observed ON decay, exhibited a nonlinear dependence on relative humidity (RH): an ON decay rate of 2 day<sup>−1</sup> was observed when the RH ranged between 20 and 60 %, and no significant ON decay was observed at RH lower than 20 %. In experiments when the highest observed RH exceeded the deliquescence RH of the ammonium sulfate seed aerosol, the particle-phase ON decay rate was as high as 7 day<sup>−1</sup> and more variable. The ON gas–particle partitioning was dependent on total OA concentration and temperature, consistent with absorptive partitioning theory. In a volatility basis set, the ON partitioning was consistent with mass fractions of [0 0.11 0.03 0.86] at saturation mass concentrations (<i>C</i>*) of [1 10 100 1000] µg m<sup>−3</sup>.
Creator (Dublin Core)
Bean, Jeffrey K.
Hildebrandt Ruiz, Lea
Date (Dublin Core)
2018-09-10
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-16-2175-2016
https://acp.copernicus.org/articles/16/2175/2016/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
