1 / 25

δ 13 C/ 12 C measurements of particulate matter in Preila, Lithuania Andrius Garbaras

δ 13 C/ 12 C measurements of particulate matter in Preila, Lithuania Andrius Garbaras Institute of Physics Vilnius, Lithuania 2008.

felix-wagner
Download Presentation

δ 13 C/ 12 C measurements of particulate matter in Preila, Lithuania Andrius Garbaras

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. δ13C/12C measurements of particulate matter in Preila, Lithuania Andrius Garbaras Institute of Physics Vilnius, Lithuania 2008

  2. Isotopic characterization of PM can play an important role in the individuation of primary and secondary sources and also in the determination of the natural/biogenic or anthropogenic/combustion contribution to the measured concentration

  3. Stable isotopes in nature

  4. Delta notation R – izotopic ratio, RPDB = 0,0112372±0,0000090 Standart: C: PDB (PeeDee Belomnite)

  5. PM characterisation by carbon isotope In the background and suburban sites the δ13C sow a bigger variability than in the urban sites, and this could be well correlated with the constant emissions from traffic. In background sites variability is bigger and related to the changing in the contribution from natural, secondary and anthropogenic source emissions. Low volume sampler Quartz fibre filters 24h PM Characterization by Carbon Isotope C. Grassi, V. Campigli, L. Dallai, S. Nottoli, L. Tognotti, M. Guidi Cite abstract as Author(s) (2007), Title, European Aerosol Conference 2007, Salzburg, Abstract T15A011

  6. 13C/12C can be satisfactory indicator of the origin of the atmospheric carbon Aerosols are often a mixture and their apparent δ13C is dependent on the relative intensity of the contributing sources Marine source and natural continental sources Industrial combustion or vegetation fire

  7. Carbon-isotope composition of aerosols can distinquish between diesel an fuel oil, and other sources 07/05 diesel contribution about 50%. But other identification is not possible through the sole use of stable carbon isotopes The use of isotopes for understanding airborne pollution sources is encouraging PM2.5 PM10 Paris Widory, D. et al. (2004). Atmospheric Environment38, 953–961.

  8. He CO2 Elemental analyser Isotopic ratio mass spectrometer

  9. Elemental analyser to IRMS

  10. Isotopic ratio mass spectrometer 12C16O16O (m/z=44) 13C16O16O (m/z=45)

  11. Sampling: • Sampling for 24 h • Quartz fiber filters, preheated 600°C, 3hs • PM 2.5 sampler , flow 2.3 m3/h Analysis: filter is cut to 1/6, put in to tin capsule and dropped to EA

  12. Chromatogram

  13. Aerosol 13C/12C measurements

  14. Black carbon

  15. Take home messages carbon δ13C/12C ratio is indicator of different aerosol origin

More Related