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Uptake and surface chemistry of SO2 on natural volcanic dusts

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dc.contributor Landbúnaðarháskóli Íslands
dc.contributor Agricultural University of Iceland
dc.contributor.author Urupina, Darya
dc.contributor.author Lasne, Jerome
dc.contributor.author romanias, manolis
dc.contributor.author Thiery, Vincent
dc.contributor.author Dagsson-Waldhauserova, Pavla
dc.contributor.author THEVENET, Frederic
dc.date.accessioned 2019-11-21T13:12:25Z
dc.date.available 2019-11-21T13:12:25Z
dc.date.issued 2019-11
dc.identifier.citation Urupina, D., Lasne, J., Romanias, M. N., Thiery, V., Dagsson-Waldhauserova, P., & Thevenet, F. (2019). Uptake and surface chemistry of SO2 on natural volcanic dusts. Atmospheric Environment, 217, 116942.
dc.identifier.issn 1352-2310
dc.identifier.uri https://hdl.handle.net/20.500.11815/1349
dc.description.abstract V-dust (v-dust) is a highly variable source of natural particles in the atmosphere, and during the period of high volcanic activity it can provide a large surface for heterogeneous interactions with other atmospheric compounds. Icelandic v-dust was chosen as a case study due to frequency of volcanic eruptions and high aeolian activity in the area. In this study, we focus on the kinetics and mechanism of the reaction of sulfur dioxide (SO2) with natural v-dust samples under atmospheric conditions using coated wall flow tube reactor and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Steady state uptake coefficients determined are in the range of 10−9 to 10−8 depending on the considered v-dust. Concomitantly with SO2 uptake, both sulfites and sulfates are monitored on the surface of v-dust, with sulfates being the final oxidation product, attesting of SO2 surface reaction. Surface hydroxyl groups play a crucial role in the conversion of SO2 to sulfites as evidenced from both flow tube and DRIFTS experiments. Based on these experimental results, a mechanism for SO2 interaction with different surface sites of v-dust is proposed and discussed. This study provides original insights in the kinetics of SO2 uptake under simulated atmospheric conditions and its mechanism and transformation on volcanic material. To that regards, it brings an accurate perspective on SO2 heterogeneous sinks in the atmosphere.
dc.description.sponsorship The authors acknowledge Mr Vincent Gaudion and Dr Mohamad Zeineddine (SAGE, IMT Lille Douai) for their assistance in the lab. We are grateful to Mr Bruno Malet and Dr Laurent Alleman (SAGE, IMT Lille Douai) for conducting the ICP-MS experiments. This work was achieved in the frame of Labex CaPPA, funded by ANR through the PIA under contract ANR-11-LABX-0005-01, and CPER CLIMIBIO project, both funded by the Hauts-de-France Regional Council and the European Regional Development Fund (ERDF). J. Lasne acknowledges support from the Labex CaPPA and CPER CLIMIBIO projects and the Hauts-de-France Regional Council for his post-doctoral fellowship.
dc.format.extent 116942
dc.language.iso en
dc.publisher Elsevier BV
dc.relation.ispartofseries Athmosperic Environment;217
dc.rights info:eu-repo/semantics/openAccess
dc.subject Atmospheric Science
dc.subject Sulfur dioxide
dc.subject Brennisteinsdíoxíð
dc.subject Aska
dc.subject Loftslag
dc.title Uptake and surface chemistry of SO2 on natural volcanic dusts
dc.type info:eu-repo/semantics/article
dc.description.version Peer Reviewed
dc.identifier.journal Atmospheric Environment
dc.identifier.doi doi.org/10.1016/j.atmosenv.2019.116942
dc.relation.url https://www.sciencedirect.com/science/article/pii/S1352231019305813
dc.contributor.department Auðlinda- og umhverfisdeild (LBHÍ)
dc.contributor.department Faculty of Natural Resources and Environmental Sciences (AUI)

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