ELFT HÍRADÓ

[Gácsi Zoltán <gacsi AT atomki.mta.hu>]

Az MTA Atommagkutató Intézet előadótermében
(Debrecen, Poroszlay út 6, XII. ép. III. em.)
2016. február 9-én, KEDDen 11:00-kor
intézeti szeminárium lesz:

Cím:
"Source apportionment of carbonaceous aerosols using radiocarbon"

Előadó:
Sönke SZIDAT, Dept. of Chemistry and Biochemistry & Oeschger Centre for 
Climate Change Research, University of Bern, Switzerland, 
szidat AT dcb.unibe.ch

Kivonat:   
Carbonaceous aerosols are a major fraction of particulate matter (PM) in the 
atmosphere and contribute substantially to climate and health effektus. For 
mitigation of emissions, a detailed knowledge of sources and formation 
processes is necessary, which is a difficult task. A differentiation of 
fossil from non-fossil emissions is provided by analysis of the long-lived 
radioisotope 14C (radiocarbon, half-life 5730 years), as fossil material does 
not contain 14C anymore because of its age, whereas non-fossil material is on 
the contemporary 14C level. Carbonaceous aerosols are often differentiated 
into organic carbon (OC) and elemental carbon (EC) according to their 
physical and chemical properties. For 14C source apportionment, it is 
necessary to separate both fractions from each other efficiently in order to 
omit biases. This presentation will show a procedure for the separation of OC 
and EC with a thermal-optical aerosol analyzer combined with online 14C 
analysis using accelerator mass spectrometry (AMS) and the application of 
this technique to air quality studies in Europe and East Asia.


Az előadás előtt 10:30-kor tea. Vendégeket szívesen látunk.


                                                Gácsi Zoltán
_______________________________________________
Mind mailing list
Mind AT atomki.mta.hu
http://lists.atomki.hu/mailman/listinfo/mind