The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixtures
<p>In this study, we investigate the influence of isoprene on the volatility of secondary organic aerosol (SOA) formed during the photo-oxidation of mixtures of anthropogenic and biogenic precursors. The SOA particle volatility was quantified using two independent experimental techniques (usin...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/22/13677/2022/acp-22-13677-2022.pdf |
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| author | A. Voliotis M. Du Y. Wang Y. Shao T. J. Bannan M. Flynn S. N. Pandis S. N. Pandis C. J. Percival M. R. Alfarra M. R. Alfarra G. McFiggans |
| author_facet | A. Voliotis M. Du Y. Wang Y. Shao T. J. Bannan M. Flynn S. N. Pandis S. N. Pandis C. J. Percival M. R. Alfarra M. R. Alfarra G. McFiggans |
| author_sort | A. Voliotis |
| collection | DOAJ |
| description | <p>In this study, we investigate the influence of isoprene on the volatility of
secondary organic aerosol (SOA) formed during the photo-oxidation of
mixtures of anthropogenic and biogenic precursors. The SOA particle
volatility was quantified using two independent experimental techniques
(using a thermal denuder and the Filter Inlet for Gas and Aerosols iodide high-resolution time-of-flight Chemical Ionisation Mass Spectrometer – FIGAERO-CIMS) in mixtures of <span class="inline-formula"><i>α</i></span>-pinene/isoprene, <span class="inline-formula"><i>o</i></span>-cresol/isoprene, and <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol/isoprene. Single-precursor experiments at various initial
concentrations and results from previous <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol
experiments were used as a reference. The oxidation of isoprene did not result in the formation of detectable SOA particle mass in single-precursor
experiments. However, isoprene-derived products were identified in the mixed
systems, likely due to the increase in the total absorptive mass. The
addition of isoprene resulted in mixture-dependent influence on the SOA
particle volatility. Isoprene made no major change to the volatility of
<span class="inline-formula"><i>α</i></span>-pinene SOA particles, though changes in the SOA particle composition were observed and the volatility was reasonably predicted based
on the additivity. Isoprene addition increased <span class="inline-formula"><i>o</i></span>-cresol SOA particle
volatility by <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M9" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">5</mn><mo>/</mo><mn mathvariant="normal">15</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="37pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="8fb514b05a689cc9c401220c86e61467"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-22-13677-2022-ie00001.svg" width="37pt" height="14pt" src="acp-22-13677-2022-ie00001.png"/></svg:svg></span></span> % of the total mass/signal,
respectively, indicating a potential to increase the overall volatility that
cannot be predicted based on the additivity. The addition of isoprene to the
<span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol system (i.e. <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol/isoprene) resulted in slightly fewer volatile particles than those measured in the <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol systems. The measured volatility in the <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol/isoprene system had an <span class="inline-formula">∼6</span> % higher low volatile organic compound (LVOC) mass/signal compared to that predicted assuming additivity with a correspondingly lower semi-volatile organic compound (SVOC) fraction. This suggests that any effects that could increase the SOA volatility from the addition of isoprene are likely
outweighed by the formation of lower-volatility compounds in more complex anthropogenic–biogenic precursor mixtures. Detailed chemical composition measurements support the measured volatility distribution changes and showed
an abundance of unique-to-the-mixture products appearing in all the mixed
systems accounting for around 30 %–40 % of the total particle-phase signal. Our results demonstrate that the SOA particle volatility and its
prediction can be affected by the interactions of the oxidized products in mixed-precursor systems, and further mechanistic understanding is required to improve their representation in chemical transport models.</p> |
| first_indexed | 2024-04-12T16:03:30Z |
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| id | doaj.art-8d50066e815646c7bb55060e1b5e64e1 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-12T16:03:30Z |
| publishDate | 2022-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-8d50066e815646c7bb55060e1b5e64e12022-12-22T03:26:09ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242022-10-0122136771369310.5194/acp-22-13677-2022The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixturesA. Voliotis0M. Du1Y. Wang2Y. Shao3T. J. Bannan4M. Flynn5S. N. Pandis6S. N. Pandis7C. J. Percival8M. R. Alfarra9M. R. Alfarra10G. McFiggans11Department of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Chemical Engineering, University of Patras, Patras, GreeceInstitute of Chemical Engineering Sciences, FORTH, Patras, GreeceNASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USADepartment of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Earth and Environmental Science, National Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UKDepartment of Earth and Environmental Science, Centre for Atmospheric Science, School of Natural Sciences, University of Manchester, Oxford Road, M13 9PL, Manchester, UK<p>In this study, we investigate the influence of isoprene on the volatility of secondary organic aerosol (SOA) formed during the photo-oxidation of mixtures of anthropogenic and biogenic precursors. The SOA particle volatility was quantified using two independent experimental techniques (using a thermal denuder and the Filter Inlet for Gas and Aerosols iodide high-resolution time-of-flight Chemical Ionisation Mass Spectrometer – FIGAERO-CIMS) in mixtures of <span class="inline-formula"><i>α</i></span>-pinene/isoprene, <span class="inline-formula"><i>o</i></span>-cresol/isoprene, and <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol/isoprene. Single-precursor experiments at various initial concentrations and results from previous <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol experiments were used as a reference. The oxidation of isoprene did not result in the formation of detectable SOA particle mass in single-precursor experiments. However, isoprene-derived products were identified in the mixed systems, likely due to the increase in the total absorptive mass. The addition of isoprene resulted in mixture-dependent influence on the SOA particle volatility. Isoprene made no major change to the volatility of <span class="inline-formula"><i>α</i></span>-pinene SOA particles, though changes in the SOA particle composition were observed and the volatility was reasonably predicted based on the additivity. Isoprene addition increased <span class="inline-formula"><i>o</i></span>-cresol SOA particle volatility by <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M9" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">5</mn><mo>/</mo><mn mathvariant="normal">15</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="37pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="8fb514b05a689cc9c401220c86e61467"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-22-13677-2022-ie00001.svg" width="37pt" height="14pt" src="acp-22-13677-2022-ie00001.png"/></svg:svg></span></span> % of the total mass/signal, respectively, indicating a potential to increase the overall volatility that cannot be predicted based on the additivity. The addition of isoprene to the <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol system (i.e. <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol/isoprene) resulted in slightly fewer volatile particles than those measured in the <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol systems. The measured volatility in the <span class="inline-formula"><i>α</i></span>-pinene/<span class="inline-formula"><i>o</i></span>-cresol/isoprene system had an <span class="inline-formula">∼6</span> % higher low volatile organic compound (LVOC) mass/signal compared to that predicted assuming additivity with a correspondingly lower semi-volatile organic compound (SVOC) fraction. This suggests that any effects that could increase the SOA volatility from the addition of isoprene are likely outweighed by the formation of lower-volatility compounds in more complex anthropogenic–biogenic precursor mixtures. Detailed chemical composition measurements support the measured volatility distribution changes and showed an abundance of unique-to-the-mixture products appearing in all the mixed systems accounting for around 30 %–40 % of the total particle-phase signal. Our results demonstrate that the SOA particle volatility and its prediction can be affected by the interactions of the oxidized products in mixed-precursor systems, and further mechanistic understanding is required to improve their representation in chemical transport models.</p>https://acp.copernicus.org/articles/22/13677/2022/acp-22-13677-2022.pdf |
| spellingShingle | A. Voliotis M. Du Y. Wang Y. Shao T. J. Bannan M. Flynn S. N. Pandis S. N. Pandis C. J. Percival M. R. Alfarra M. R. Alfarra G. McFiggans The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixtures Atmospheric Chemistry and Physics |
| title | The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixtures |
| title_full | The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixtures |
| title_fullStr | The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixtures |
| title_full_unstemmed | The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixtures |
| title_short | The influence of the addition of isoprene on the volatility of particles formed from the photo-oxidation of anthropogenic–biogenic mixtures |
| title_sort | influence of the addition of isoprene on the volatility of particles formed from the photo oxidation of anthropogenic biogenic mixtures |
| url | https://acp.copernicus.org/articles/22/13677/2022/acp-22-13677-2022.pdf |
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