Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locations
<p>Polycyclic aromatic compounds (PACs) continue to demand attention due to their widespread presence and well-established health implications. Given that incomplete combustion is a major contributor to PACs and inhalation constitutes a crucial human exposure pathway, a comprehensive understan...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2024-01-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/17/715/2024/amt-17-715-2024.pdf |
| _version_ | 1827369930199138304 |
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| author | Y. Li F. Zhan Y. Su Y. Su Y. D. Lei C. Shunthirasingham Z. Zhou J. P. D. Abbatt H. Hung F. Wania |
| author_facet | Y. Li F. Zhan Y. Su Y. Su Y. D. Lei C. Shunthirasingham Z. Zhou J. P. D. Abbatt H. Hung F. Wania |
| author_sort | Y. Li |
| collection | DOAJ |
| description | <p>Polycyclic aromatic compounds (PACs) continue to demand attention due to their widespread presence and well-established health implications. Given that incomplete combustion is a major contributor to PACs and inhalation constitutes a crucial human exposure pathway, a comprehensive understanding of the concentrations, spatial distributions, and fates of a broad range of PACs in the atmosphere is important. Passive air samplers (PASs) are a commonly utilized technique for PAC sampling and monitoring. In this study, we present the results from two 1-year calibration experiments, one starting in summer and the other in winter, using a passive air sampler equipped with XAD resin as the sorbent (XAD-PAS). Throughout both experiments, PACs were consistently sorbed during the initial 6-month period. However, the sorbed amounts for many PACs exhibited a decrease after half a year of deployment. Three hypotheses to explain this phenomenon were explored, including the uptake of atmospheric particles, evaporation from the sorbent, and reactions with photo-oxidants. All had to be rejected based on the obtained data, additional laboratory experiments, and model results. Model simulations were further used to (i) confirm that a loss process must be invoked to explain the observed uptake behavior and (ii) estimate the kinetics of that loss process for different PACs. Sampling rates (SRs) for 28 PACs derived from the linearized uptake curves during the first 6 months of deployment were comparable to those of other semi-volatile organic compounds obtained during the same calibration experiment, and they also demonstrate a consistent negative correlation with volatility.</p> |
| first_indexed | 2024-03-08T09:59:51Z |
| format | Article |
| id | doaj.art-72a90124b4e24b7e94101dda1c543476 |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-03-08T09:59:51Z |
| publishDate | 2024-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-72a90124b4e24b7e94101dda1c5434762024-01-29T13:13:24ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482024-01-011771572910.5194/amt-17-715-2024Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locationsY. Li0F. Zhan1Y. Su2Y. Su3Y. D. Lei4C. Shunthirasingham5Z. Zhou6J. P. D. Abbatt7H. Hung8F. Wania9Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4 Ontario, CanadaDepartment of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4 Ontario, CanadaDepartment of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4 Ontario, Canadacurrently at: Ontario Ministry of the Environment, Conservation and Parks, 125 Resources Road, Etobicoke, M9P 3V6 Ontario, CanadaDepartment of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4 Ontario, CanadaAir Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, M3H 5T4 Ontario, CanadaDepartment of Chemistry, University of Toronto, 80 St George Street, Toronto, M5S 3H6 Ontario, CanadaDepartment of Chemistry, University of Toronto, 80 St George Street, Toronto, M5S 3H6 Ontario, CanadaAir Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, M3H 5T4 Ontario, CanadaDepartment of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4 Ontario, Canada<p>Polycyclic aromatic compounds (PACs) continue to demand attention due to their widespread presence and well-established health implications. Given that incomplete combustion is a major contributor to PACs and inhalation constitutes a crucial human exposure pathway, a comprehensive understanding of the concentrations, spatial distributions, and fates of a broad range of PACs in the atmosphere is important. Passive air samplers (PASs) are a commonly utilized technique for PAC sampling and monitoring. In this study, we present the results from two 1-year calibration experiments, one starting in summer and the other in winter, using a passive air sampler equipped with XAD resin as the sorbent (XAD-PAS). Throughout both experiments, PACs were consistently sorbed during the initial 6-month period. However, the sorbed amounts for many PACs exhibited a decrease after half a year of deployment. Three hypotheses to explain this phenomenon were explored, including the uptake of atmospheric particles, evaporation from the sorbent, and reactions with photo-oxidants. All had to be rejected based on the obtained data, additional laboratory experiments, and model results. Model simulations were further used to (i) confirm that a loss process must be invoked to explain the observed uptake behavior and (ii) estimate the kinetics of that loss process for different PACs. Sampling rates (SRs) for 28 PACs derived from the linearized uptake curves during the first 6 months of deployment were comparable to those of other semi-volatile organic compounds obtained during the same calibration experiment, and they also demonstrate a consistent negative correlation with volatility.</p>https://amt.copernicus.org/articles/17/715/2024/amt-17-715-2024.pdf |
| spellingShingle | Y. Li F. Zhan Y. Su Y. Su Y. D. Lei C. Shunthirasingham Z. Zhou J. P. D. Abbatt H. Hung F. Wania Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locations Atmospheric Measurement Techniques |
| title | Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locations |
| title_full | Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locations |
| title_fullStr | Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locations |
| title_full_unstemmed | Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locations |
| title_short | Uptake behavior of polycyclic aromatic compounds during field calibrations of the XAD-based passive air sampler across seasons and locations |
| title_sort | uptake behavior of polycyclic aromatic compounds during field calibrations of the xad based passive air sampler across seasons and locations |
| url | https://amt.copernicus.org/articles/17/715/2024/amt-17-715-2024.pdf |
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