Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experiments
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 phot...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2016-02-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/16/2175/2016/acp-16-2175-2016.pdf |
| _version_ | 1817993301007007744 |
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| author | J. K. Bean L. Hildebrandt Ruiz |
| author_facet | J. K. Bean L. Hildebrandt Ruiz |
| author_sort | J. K. Bean |
| collection | DOAJ |
| description | 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>. |
| first_indexed | 2024-04-14T01:37:07Z |
| format | Article |
| id | doaj.art-e6ce348193de4a43a2fcdc53975df119 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-14T01:37:07Z |
| publishDate | 2016-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-e6ce348193de4a43a2fcdc53975df1192022-12-22T02:19:54ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242016-02-01162175218410.5194/acp-16-2175-2016Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experimentsJ. K. Bean0L. Hildebrandt Ruiz1McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, USAMcKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, USAGas–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>.https://www.atmos-chem-phys.net/16/2175/2016/acp-16-2175-2016.pdf |
| spellingShingle | J. K. Bean L. Hildebrandt Ruiz Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experiments Atmospheric Chemistry and Physics |
| title | Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experiments |
| title_full | Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experiments |
| title_fullStr | Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experiments |
| title_full_unstemmed | Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experiments |
| title_short | Gas–particle partitioning and hydrolysis of organic nitrates formed from the oxidation of <i>α</i>-pinene in environmental chamber experiments |
| title_sort | gas particle partitioning and hydrolysis of organic nitrates formed from the oxidation of i α i pinene in environmental chamber experiments |
| url | https://www.atmos-chem-phys.net/16/2175/2016/acp-16-2175-2016.pdf |
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