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| Titel |
Model reactions and natural occurrence of furans from hypersaline environments |
| VerfasserIn |
T. Krause, C. Tubbesing, K. Benzing, H. F. Schöler |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 10 ; Nr. 11, no. 10 (2014-05-28), S.2871-2882 |
| Datensatznummer |
250117428
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| Publikation (Nr.) |
 copernicus.org/bg-11-2871-2014.pdf |
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| Zusammenfassung |
Volatile organic compounds like furan and its derivatives are
important for atmospheric properties and reactions. In this work the
known abiotic formation of furan from catechol under Fenton-like
conditions with Fe3+ sulfate was revised by the use of
a bispidine Fe2+ complex as a model compound for iron with
well-known characteristics. While total yields were comparable to
those with the Fe3+ salt, the bispidine Fe2+ complex
is a better catalyst as the turnover numbers of the active iron species
were higher. Additionally, the role of iron and pH is discussed in relation to
furan formation from model compounds and in natural sediment and water
samples collected from the Dead Sea and several salt lakes in Western
Australia. Various alkylated furans and even traces of halogenated furans
(3-chlorofuran and 3-bromofuran) were found in some Australian samples.
3-chlorofuran was found in three sediments and four water samples,
whereas 3-bromofuran was detected in three water samples. Further,
the emission of furans is compared to the abundance of several possible
precursors such as isoprene and aromatic hydrocarbons as well as to the
related thiophenes.
It is deduced that the emissions of volatile organic compounds such as
furans contribute to the formation of ultra-fine particles in the
vicinity of salt lakes and are important for the local
climate. |
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