تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
الإجهاد التأكسدى لغبارعالق تم تجميعه من مناطق ذات مصادر مختلفة
Oxidative potential of particulate matter collected at sites with different source characteristics
 
الموضوع : علوم البيئة 
لغة الوثيقة : الانجليزية 
المستخلص : 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. 
ردمد : 0048-9697 
اسم الدورية : Science of the Total Environment 
المجلد : 472 
العدد : 2014 
سنة النشر : 1435 هـ
2014 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Tuesday, April 1, 2014 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
Nicole A.H. JanssenJanssen, Nicole A.H.باحث Nicole.Janssen@rivm.nl
Aileen YangYang, Aileen باحث  
Maciej StrakStrak, Maciej باحث  
Maaike SteenhofSteenhof, Maaike باحث  
Bryan HellackHellack, Bryan باحث  
Miriam E. Gerlofs-NijlandGerlofs-Nijland, Miriam E.باحث  
Thomas KuhlbuschKuhlbusch, Thomas باحث  
Frank KellyKelly, Frank باحث  
Roy HarrisonHarrison, Roy باحث  
Bert BrunekreefBrunekreef, Bert باحث  
Gerard HoekHoek, Gerard باحث  
Flemming CasseeCassee, Flemming باحث  

الملفات

اسم الملفالنوعالوصف
 36754.pdf pdfOxidative potential of particulate matter collected at sites with different source characteristics?

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