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Source Apportionment of Aerosols by 14C Measurements in Different Carbonaceous Particle Fractions

Published online by Cambridge University Press:  18 July 2016

S Szidat
Affiliation:
Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.
T M Jenk
Affiliation:
Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland. Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland.
H W Gäggeler*
Affiliation:
Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland. Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland.
H-A Synal
Affiliation:
Paul Scherrer Institut (PSI), c/o Institute for Particle Physics, ETH Hönggerberg, CH-8093 Zürich, Switzerland.
R Fisseha
Affiliation:
Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland.
U Baltensperger
Affiliation:
Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland.
M Kalberer
Affiliation:
Laboratory of Organic Chemistry, ETH Hönggerberg, CH-8093 Zürich, Switzerland.
V Samburova
Affiliation:
Laboratory of Organic Chemistry, ETH Hönggerberg, CH-8093 Zürich, Switzerland.
L Wacker
Affiliation:
Institute for Particle Physics, ETH Hönggerberg, CH-8093 Zürich, Switzerland.
M Saurer
Affiliation:
Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland.
M Schwikowski
Affiliation:
Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland.
I Hajdas
Affiliation:
Paul Scherrer Institut (PSI), c/o Institute for Particle Physics, ETH Hönggerberg, CH-8093 Zürich, Switzerland.
*
Corresponding author. Email: heinz.gaeggeler@iac.unibe.ch.
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Abstract

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Radiocarbon enables a distinction between contemporary and fossil carbon, which can be used for the apportionment of biogenic and anthropogenic sources in environmental studies. In order to apply this approach to carbonaceous atmospheric aerosols, it is necessary to adapt pretreatment procedures to the requirements of 14C measurements. In this work, we followed an approach in which total carbon (TC) is subdivided into fractions of different chemical and physical properties. 14C data of ambient aerosols from Zürich (Switzerland) are presented for the 2 sub-fractions of TC, organic carbon (OC) and elemental carbon (EC). Furthermore, OC is separated into water-insoluble OC (WINSOC) and water-soluble OC (WSOC). Results demonstrate the importance to differentiate between these fractions for 14C-deduced source apportionment, as the contributions can range between both extremes, nearly exclusively biogenic and anthropogenic.

Type
Articles
Copyright
Copyright © 2004 by the Arizona Board of Regents on behalf of the University of Arizona 

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