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| Titel |
Characterizing black carbon in rain and ice cores using coupled tangential flow filtration and transmission electron microscopy |
| VerfasserIn |
A. Ellis, R. Edwards, M. Saunders, R. K. Chakrabarty, R. Subramanian, A. Riessen, A. M. Smith, D. Lambrinidis, L. J. Nunes, P. Vallelonga, I. D. Goodwin, A. D. Moy, M. A. J. Curran, T. D. Ommen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 9 ; Nr. 8, no. 9 (2015-09-29), S.3959-3969 |
| Datensatznummer |
250116588
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| Publikation (Nr.) |
 copernicus.org/amt-8-3959-2015.pdf |
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| Zusammenfassung |
| Antarctic ice cores have been used to study the history of black carbon
(BC), but little is known with regards to the physical and chemical
characteristics of these particles in the remote atmosphere.
Characterization remains limited by ultra-trace concentrations in ice core
samples and the lack of adequate methods to isolate the particles unaltered
from the melt water. To investigate the physical and chemical
characteristics of these particles, we have developed a tangential flow
filtration (TFF) method combined with transmission electron microscopy
(TEM). Tests using ultrapure water and polystyrene latex particle standards
resulted in excellent blanks and significant particle recovery. This
approach has been applied to melt water from Antarctic ice cores as well as
tropical rain from Darwin, Australia with successful results: TEM analysis
revealed a variety of BC particle morphologies, insoluble coatings, and the
attachment of BC to mineral dust particles. The TFF-based concentration of
these particles has proven to give excellent results for TEM studies of BC
particles in Antarctic ice cores and can be used for future studies of
insoluble aerosols in rainwater and ice core samples. |
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