High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersite
The oxidative potential (OP) of airborne particulate matter (PM) is gaining increasing attention as a health-relevant metric to describe the capacity of PM to promote oxidative stress and cause adverse health effects. To date, most OP studies use filter-based approaches to sample PM and quantify OP,...
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-11-01
|
| Series: | Environment International |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412024006883 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850130476219498496 |
|---|---|
| author | Steven J. Campbell Alexandre Barth Gang I. Chen Anja H. Tremper Max Priestman David Ek Shuming Gu Frank J. Kelly Markus Kalberer David C. Green |
| author_facet | Steven J. Campbell Alexandre Barth Gang I. Chen Anja H. Tremper Max Priestman David Ek Shuming Gu Frank J. Kelly Markus Kalberer David C. Green |
| author_sort | Steven J. Campbell |
| collection | DOAJ |
| description | The oxidative potential (OP) of airborne particulate matter (PM) is gaining increasing attention as a health-relevant metric to describe the capacity of PM to promote oxidative stress and cause adverse health effects. To date, most OP studies use filter-based approaches to sample PM and quantify OP, which have relatively poor time resolution (∼24 h) and underestimate the contribution of reactive components to OP due to the time delay between sample collection and analysis. To address this important limitation, we have developed a novel instrument which uses a direct-to-reagent sampling approach, providing robust, continuous, high time resolution (5 min) OP quantification, hence overcoming analytical limitations of filter-based techniques. In this study, we deployed this instrument in the Marylebone Road Air Quality Monitoring Station in London, UK, alongside a broad suite of high time resolution PM2.5 composition measurements for three months continuous measurement during Summer 2023. High time resolution OP quantification reveals dynamic changes in volume-normalised (OPv) and mass normalised (OPm) OP evolving over ∼hourly timescales, observed at an average PM2.5 mass concentration of 7.1 ± 4.2 µg m−3, below the WHO interim 4 target of 10 µg m−3. In addition, high time resolution data facilitates directional analysis, allowing us to determine the influence of wind speed and wind direction on OP, and the identification of PM2.5 chemical components and sources which drive dynamic changes in OP; this includes traffic emissions, as well as emissions from the London Underground into the ambient airshed. These results demonstrate the capacity of high time resolution measurements to provide new insights into the temporal evolution of OP, as well as the composition and emission sources which drive OP, developing our understanding of the characteristics of PM2.5 which may promote adverse health impacts. |
| format | Article |
| id | doaj-art-b8274f39139b4b8fbf703dbbf8cf3238 |
| institution | OA Journals |
| issn | 0160-4120 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj-art-b8274f39139b4b8fbf703dbbf8cf32382025-08-20T02:32:41ZengElsevierEnvironment International0160-41202024-11-0119310910210.1016/j.envint.2024.109102High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersiteSteven J. Campbell0Alexandre Barth1Gang I. Chen2Anja H. Tremper3Max Priestman4David Ek5Shuming Gu6Frank J. Kelly7Markus Kalberer8David C. Green9MRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UK; Corresponding author.Department of Environmental Sciences, University of Basel, Klingelbergstrasse 27, 4056 Basel, SwitzerlandMRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UKMRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UKMRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UKMRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UKMRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UKMRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UK; NIHR HPRU in Environmental Exposures and Health, Imperial College London, UKDepartment of Environmental Sciences, University of Basel, Klingelbergstrasse 27, 4056 Basel, SwitzerlandMRC Centre for Environment and Health, Environmental Research Group, Imperial College London, 86 Wood Lane, London W12 0BZ, UK; NIHR HPRU in Environmental Exposures and Health, Imperial College London, UKThe oxidative potential (OP) of airborne particulate matter (PM) is gaining increasing attention as a health-relevant metric to describe the capacity of PM to promote oxidative stress and cause adverse health effects. To date, most OP studies use filter-based approaches to sample PM and quantify OP, which have relatively poor time resolution (∼24 h) and underestimate the contribution of reactive components to OP due to the time delay between sample collection and analysis. To address this important limitation, we have developed a novel instrument which uses a direct-to-reagent sampling approach, providing robust, continuous, high time resolution (5 min) OP quantification, hence overcoming analytical limitations of filter-based techniques. In this study, we deployed this instrument in the Marylebone Road Air Quality Monitoring Station in London, UK, alongside a broad suite of high time resolution PM2.5 composition measurements for three months continuous measurement during Summer 2023. High time resolution OP quantification reveals dynamic changes in volume-normalised (OPv) and mass normalised (OPm) OP evolving over ∼hourly timescales, observed at an average PM2.5 mass concentration of 7.1 ± 4.2 µg m−3, below the WHO interim 4 target of 10 µg m−3. In addition, high time resolution data facilitates directional analysis, allowing us to determine the influence of wind speed and wind direction on OP, and the identification of PM2.5 chemical components and sources which drive dynamic changes in OP; this includes traffic emissions, as well as emissions from the London Underground into the ambient airshed. These results demonstrate the capacity of high time resolution measurements to provide new insights into the temporal evolution of OP, as well as the composition and emission sources which drive OP, developing our understanding of the characteristics of PM2.5 which may promote adverse health impacts.http://www.sciencedirect.com/science/article/pii/S0160412024006883Oxidative potentialPM2.5PM2.5 compositionAir PollutionAir Pollution Health Effects |
| spellingShingle | Steven J. Campbell Alexandre Barth Gang I. Chen Anja H. Tremper Max Priestman David Ek Shuming Gu Frank J. Kelly Markus Kalberer David C. Green High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersite Environment International Oxidative potential PM2.5 PM2.5 composition Air Pollution Air Pollution Health Effects |
| title | High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersite |
| title_full | High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersite |
| title_fullStr | High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersite |
| title_full_unstemmed | High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersite |
| title_short | High time resolution quantification of PM2.5 oxidative potential at a Central London roadside supersite |
| title_sort | high time resolution quantification of pm2 5 oxidative potential at a central london roadside supersite |
| topic | Oxidative potential PM2.5 PM2.5 composition Air Pollution Air Pollution Health Effects |
| url | http://www.sciencedirect.com/science/article/pii/S0160412024006883 |
| work_keys_str_mv | AT stevenjcampbell hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT alexandrebarth hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT gangichen hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT anjahtremper hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT maxpriestman hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT davidek hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT shuminggu hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT frankjkelly hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT markuskalberer hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite AT davidcgreen hightimeresolutionquantificationofpm25oxidativepotentialatacentrallondonroadsidesupersite |