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Document Type |
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Article In Journal |
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Document Title |
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Oxidative potential of particulate matter collected at sites with different source characteristics الإجهاد التأكسدى لغبارعالق تم تجميعه من مناطق ذات مصادر مختلفة |
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Subject |
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Enviromental sciences |
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Document Language |
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English |
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Abstract |
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Background: The oxidative potential (OP) of particulatematter (PM) has been proposed as a more health relevant
metric than PM mass. Different assays exist for measuring OP and little is known about how the different assays
compare.
Aim: To assess the OP of PM collected at different site types and to evaluate differences between locations, size
fractions and correlation with PM mass and PM composition for different measurement methods for OP.
Methods: PM2.5 and PM10 was sampled at 5 sites: an underground station, a farm, 2 traffic sites and an urban
background site. Three a-cellular assays; dithiothreitol (OPDTT), electron spin resonance (OPESR) and ascorbate
depletion (OPAA) were used to characterize the OP of PM.
Results: The highest OP was observed at the underground, where OP of PM10 was 30 (OPDTT) to N600 (OPESR)
times higher compared to the urban background when expressed as OP/m3 and 2–40 times when expressed
as OP/μg. For the outdoor sites, samples from the farm showed significantly lower OPESR and OPAA, whereas
samples from the continuous traffic site showed the highest OP for all assays. Contrasts in OP between sites
were generally larger than for PM mass and were lower for OPDTT compared to OPESR and OPAA. Furthermore,
OPDTT/μg was significantly higher in PM2.5 compared to PM10, whereas the reverse was the case for OPESR.
OPESR and OPAA were highly correlated with traffic-related PM components (i.e. EC, Fe, Cu, PAHs), whereas
OPDTT showed the highest correlation with PM mass and OC. |
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ISSN |
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0048-9697 |
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Journal Name |
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Science of the Total Environment |
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Volume |
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472 |
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Issue Number |
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2014 |
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Publishing Year |
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1435 AH
2014 AD |
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Article Type |
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Article |
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Added Date |
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Tuesday, April 1, 2014 |
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Researchers
| Nicole A.H. Janssen | Janssen, Nicole A.H. | Researcher | | Nicole.Janssen@rivm.nl |
| Aileen Yang | Yang, Aileen | Researcher | | |
| Maciej Strak | Strak, Maciej | Researcher | | |
| Maaike Steenhof | Steenhof, Maaike | Researcher | | |
| Bryan Hellack | Hellack, Bryan | Researcher | | |
| Miriam E. Gerlofs-Nijland | Gerlofs-Nijland, Miriam E. | Researcher | | |
| Thomas Kuhlbusch | Kuhlbusch, Thomas | Researcher | | |
| Frank Kelly | Kelly, Frank | Researcher | | |
| Roy Harrison | Harrison, Roy | Researcher | | |
| Bert Brunekreef | Brunekreef, Bert | Researcher | | |
| Gerard Hoek | Hoek, Gerard | Researcher | | |
| Flemming Cassee | Cassee, Flemming | Researcher | | |
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Files
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36754.pdf
| pdf | Oxidative potential of particulate matter collected at sites with
different source characteristics? |
|