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Nitrogen isotope fractionation during gas-to-particle conversion of NOx to NO3- in the atmosphere - implications for isotope-based NOx source apportionment

Chang, Y. H. and Zhang, Y. L. and Tian, C. G. and Zhang, S. C. and Ma, X. Y. and Cao, F. and Liu, X. Y. and Zhang, W. Q. and Kuhn, T. and Lehmann, M. F.. (2018) Nitrogen isotope fractionation during gas-to-particle conversion of NOx to NO3- in the atmosphere - implications for isotope-based NOx source apportionment. Atmospheric Chemistry and Physics, 18 (16). pp. 11647-11661.

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Official URL: https://edoc.unibas.ch/68501/

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Abstract

Atmospheric fine-particle (PM 2 . 5 ) pollution is fre- quently associated with the formation of particulate nitrate ( p NO − 3 ), the end product of the oxidation of NO x gases (NO + NO 2 ) in the upper troposphere. The application of sta- ble nitrogen (N) (and oxygen) isotope analyses of p NO − 3 to constrain NO x source partitioning in the atmosphere requires knowledge of the isotope fractionation during the reactions leading to nitrate formation. Here we determined the δ 15 N values of fresh p NO − 3 ( δ 15 N- p NO − 3 ) in PM 2 . 5 at a rural site in northern China, where atmospheric p NO − 3 can be at- tributed exclusively to biomass burning. The observed δ 15 N- p NO − 3 (12 . 17 ± 1 . 55 ‰; n = 8) was much higher than the N isotopic source signature of NO x from biomass burning (1 . 04 ± 4 . 13 ‰). The large difference between δ 15 N- p NO − 3 and δ 15 N-NO x (
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Geochemie Stoffkreisläufe (Lehmann)
UniBasel Contributors:Lehmann, Moritz F
Item Type:Article, refereed
Article Subtype:Research Article
ISSN:1680-7316
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:15 Apr 2020 15:49
Deposited On:15 Apr 2020 15:49

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