Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-).
Bromine (Br) and iodine (I) are chemical species that play central roles in polar atmospheric chemistry, ozone depletion, and cloud condensation nuclei formation and the natural sources to the atmosphere is the ocean1. In particular, bromine undergoes a series of autocatalytic reactions that lead to...
Main Authors: | , , , , , , , , , |
---|---|
Other Authors: | , , , , , , , , , |
Format: | Conference Object |
Language: | English |
Published: |
International Conference on the Physics and Chemistry of Ice (PCI-2023)
2023
|
Subjects: | |
Online Access: | https://hdl.handle.net/10278/5038580 |
id |
ftuniveneziairis:oai:iris.unive.it:10278/5038580 |
---|---|
record_format |
openpolar |
spelling |
ftuniveneziairis:oai:iris.unive.it:10278/5038580 2024-02-11T10:01:38+01:00 Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-). Stefano Frassati Elena Barbaro Giulio Cozzi Clara Turetta Federico Scoto Alfonso Saiz-Lopez Kitae Kim Ward van Pelt Carlo Barbante Andrea Spolaor Frassati, Stefano Barbaro, Elena Cozzi, Giulio Turetta, Clara Scoto, Federico Saiz-Lopez, Alfonso Kim, Kitae van Pelt, Ward Barbante, Carlo Spolaor, Andrea 2023 https://hdl.handle.net/10278/5038580 eng eng International Conference on the Physics and Chemistry of Ice (PCI-2023) ispartofbook:International Conference on the Physics and Chemistry of Ice (PCI2023) International Conference on the Physics and Chemistry of Ice (PCI-2023) https://hdl.handle.net/10278/5038580 Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali info:eu-repo/semantics/conferenceObject 2023 ftuniveneziairis 2024-01-17T17:39:49Z Bromine (Br) and iodine (I) are chemical species that play central roles in polar atmospheric chemistry, ozone depletion, and cloud condensation nuclei formation and the natural sources to the atmosphere is the ocean1. In particular, bromine undergoes a series of autocatalytic reactions that lead to sunlight-induced ozone depletion, these reactions are known as “bromine explosion”2. This catalytic cycle occurs at the air-snow interface, but currently, photochemical reactions are only included in the gas phase and possible photo-oxidation of bromine in snow is not addressed. In this study, an analytical method for the speciation of Br and I was developed by ion chromatography system (IC) coupled with inductively coupled plasma sector field mass spectrometer (ICP-SFMS). Thanks to this instrumental set-up we were able to achieve detection limit (LOD) of 0.3 pg g-1 for I-, 1.13 pg g-1 for IO3 -, 3.6 pg g-1 for Br-, and 2.1 pg g-1 for BrO3 -, respectively. This analytical method has been used to analyze snow samples from Holtedahlfonna glacier (HDF, Svalbard Islands) collected in interval of 10 cm. For the first time, through fine-tuning of IC/ICP-SFMS technique, it was possible to detect bromate (BrO3 -) in Artic snow at pg g-1 level. The most interesting result is that the concentration of BrO3 - remains almost constant in the deepest samples corresponding to the polar night period, but there is a significant increase in the layers exposed to sunlight. This mean that oxidation processes of bromine could occur into the snowpack producing, although in low percentage, a reservoir of inactive bromate species. Conference Object Arctic glacier polar night Svalbard Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Arctic Holtedahlfonna ENVELOPE(13.730,13.730,79.011,79.011) Svalbard |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali |
spellingShingle |
Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali Stefano Frassati Elena Barbaro Giulio Cozzi Clara Turetta Federico Scoto Alfonso Saiz-Lopez Kitae Kim Ward van Pelt Carlo Barbante Andrea Spolaor Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-). |
topic_facet |
Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali |
description |
Bromine (Br) and iodine (I) are chemical species that play central roles in polar atmospheric chemistry, ozone depletion, and cloud condensation nuclei formation and the natural sources to the atmosphere is the ocean1. In particular, bromine undergoes a series of autocatalytic reactions that lead to sunlight-induced ozone depletion, these reactions are known as “bromine explosion”2. This catalytic cycle occurs at the air-snow interface, but currently, photochemical reactions are only included in the gas phase and possible photo-oxidation of bromine in snow is not addressed. In this study, an analytical method for the speciation of Br and I was developed by ion chromatography system (IC) coupled with inductively coupled plasma sector field mass spectrometer (ICP-SFMS). Thanks to this instrumental set-up we were able to achieve detection limit (LOD) of 0.3 pg g-1 for I-, 1.13 pg g-1 for IO3 -, 3.6 pg g-1 for Br-, and 2.1 pg g-1 for BrO3 -, respectively. This analytical method has been used to analyze snow samples from Holtedahlfonna glacier (HDF, Svalbard Islands) collected in interval of 10 cm. For the first time, through fine-tuning of IC/ICP-SFMS technique, it was possible to detect bromate (BrO3 -) in Artic snow at pg g-1 level. The most interesting result is that the concentration of BrO3 - remains almost constant in the deepest samples corresponding to the polar night period, but there is a significant increase in the layers exposed to sunlight. This mean that oxidation processes of bromine could occur into the snowpack producing, although in low percentage, a reservoir of inactive bromate species. |
author2 |
Frassati, Stefano Barbaro, Elena Cozzi, Giulio Turetta, Clara Scoto, Federico Saiz-Lopez, Alfonso Kim, Kitae van Pelt, Ward Barbante, Carlo Spolaor, Andrea |
format |
Conference Object |
author |
Stefano Frassati Elena Barbaro Giulio Cozzi Clara Turetta Federico Scoto Alfonso Saiz-Lopez Kitae Kim Ward van Pelt Carlo Barbante Andrea Spolaor |
author_facet |
Stefano Frassati Elena Barbaro Giulio Cozzi Clara Turetta Federico Scoto Alfonso Saiz-Lopez Kitae Kim Ward van Pelt Carlo Barbante Andrea Spolaor |
author_sort |
Stefano Frassati |
title |
Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-). |
title_short |
Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-). |
title_full |
Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-). |
title_fullStr |
Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-). |
title_full_unstemmed |
Identification of a permanent reservoir of bromine in Arctic snow in the form of bromate (BrO3-). |
title_sort |
identification of a permanent reservoir of bromine in arctic snow in the form of bromate (bro3-). |
publisher |
International Conference on the Physics and Chemistry of Ice (PCI-2023) |
publishDate |
2023 |
url |
https://hdl.handle.net/10278/5038580 |
long_lat |
ENVELOPE(13.730,13.730,79.011,79.011) |
geographic |
Arctic Holtedahlfonna Svalbard |
geographic_facet |
Arctic Holtedahlfonna Svalbard |
genre |
Arctic glacier polar night Svalbard |
genre_facet |
Arctic glacier polar night Svalbard |
op_relation |
ispartofbook:International Conference on the Physics and Chemistry of Ice (PCI2023) International Conference on the Physics and Chemistry of Ice (PCI-2023) https://hdl.handle.net/10278/5038580 |
_version_ |
1790597423964356608 |