Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases
International audience Iodine oxides, such as iodate, should theoretically be the only stable sink species for iodine in the troposphere. However, field observations have increasingly found very little iodate and significant amounts of iodide and organically bound iodine in precipitation and aerosol...
Main Authors: | , , , , |
---|---|
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2008
|
Subjects: | |
Online Access: | https://hal.science/hal-00304128 https://hal.science/hal-00304128/document https://hal.science/hal-00304128/file/acpd-8-7977-2008.pdf |
id |
ftccsdartic:oai:HAL:hal-00304128v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00304128v1 2023-11-12T04:18:04+01:00 Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases Gilfedder, B. S. Lai, S. Petri, M. Biester, H. Hoffmann, T. Institut für Umweltgeochemie Institute of Inorganic and Analytical chemistry University of Freiburg Université de Fribourg = University of Fribourg (UNIFR) Bodensee-Wasserversorgung 2008-04-22 https://hal.science/hal-00304128 https://hal.science/hal-00304128/document https://hal.science/hal-00304128/file/acpd-8-7977-2008.pdf en eng HAL CCSD European Geosciences Union hal-00304128 https://hal.science/hal-00304128 https://hal.science/hal-00304128/document https://hal.science/hal-00304128/file/acpd-8-7977-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00304128 Atmospheric Chemistry and Physics Discussions, 2008, 8 (2), pp.7977-8008 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2008 ftccsdartic 2023-10-21T23:11:16Z International audience Iodine oxides, such as iodate, should theoretically be the only stable sink species for iodine in the troposphere. However, field observations have increasingly found very little iodate and significant amounts of iodide and organically bound iodine in precipitation and aerosols. The aim of this study was to investigate iodine speciation, including the organic fraction, in rain, snow, and aerosols in an attempt to further clarify aqueous phase iodine chemistry. Diurnal aerosol samples were taken with a 5 stage cascade impactor and a virtual impactor (PM 2.5 ) from the Mace Head research station, Ireland, during summer 2006. Rain was collected from Australia, New Zealand, Patagonia, Germany, Ireland, and Switzerland while snow was obtained from Greenland, Germany, Switzerland, and New Zealand. All samples were analysed for total iodine by inductively coupled plasma mass spectrometry (ICP-MS) and speciation was determined by coupling an ion chromatography unit to the ICP-MS. Total iodine in the aerosols from Mace Head gave a median concentration of 50 pmol m ?3 of which the majority was associated with the organic fraction (median day: 91±7%, night: 94±6% of total iodine). Iodide exhibited higher concentrations than iodate (median 5% vs. 0.8% of total iodine), and displayed significant enrichment during the day compared to the night. Interestingly, up to 5 additional, presumably anionic organic peaks were observed in all IC-ICP-MS chromatograms, composing up to 15% of the total iodine. Organically bound iodine was also the dominant fraction in all rain and snow samples, with lesser amounts of iodide and iodate (iodate was particularly low in snow). Two of the same unidentified peaks found in aerosols were also observed in precipitation from both Southern and Northern Hemispheres, suggesting that these species are transferred from the aerosol phase into precipitation. It is suggested that organo-I is formed by reactions between HOI and organic matter derived from the ocean surface layer. ... Article in Journal/Newspaper Greenland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Patagonia Greenland New Zealand Mace ENVELOPE(155.883,155.883,-81.417,-81.417) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Gilfedder, B. S. Lai, S. Petri, M. Biester, H. Hoffmann, T. Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Iodine oxides, such as iodate, should theoretically be the only stable sink species for iodine in the troposphere. However, field observations have increasingly found very little iodate and significant amounts of iodide and organically bound iodine in precipitation and aerosols. The aim of this study was to investigate iodine speciation, including the organic fraction, in rain, snow, and aerosols in an attempt to further clarify aqueous phase iodine chemistry. Diurnal aerosol samples were taken with a 5 stage cascade impactor and a virtual impactor (PM 2.5 ) from the Mace Head research station, Ireland, during summer 2006. Rain was collected from Australia, New Zealand, Patagonia, Germany, Ireland, and Switzerland while snow was obtained from Greenland, Germany, Switzerland, and New Zealand. All samples were analysed for total iodine by inductively coupled plasma mass spectrometry (ICP-MS) and speciation was determined by coupling an ion chromatography unit to the ICP-MS. Total iodine in the aerosols from Mace Head gave a median concentration of 50 pmol m ?3 of which the majority was associated with the organic fraction (median day: 91±7%, night: 94±6% of total iodine). Iodide exhibited higher concentrations than iodate (median 5% vs. 0.8% of total iodine), and displayed significant enrichment during the day compared to the night. Interestingly, up to 5 additional, presumably anionic organic peaks were observed in all IC-ICP-MS chromatograms, composing up to 15% of the total iodine. Organically bound iodine was also the dominant fraction in all rain and snow samples, with lesser amounts of iodide and iodate (iodate was particularly low in snow). Two of the same unidentified peaks found in aerosols were also observed in precipitation from both Southern and Northern Hemispheres, suggesting that these species are transferred from the aerosol phase into precipitation. It is suggested that organo-I is formed by reactions between HOI and organic matter derived from the ocean surface layer. ... |
author2 |
Institut für Umweltgeochemie Institute of Inorganic and Analytical chemistry University of Freiburg Université de Fribourg = University of Fribourg (UNIFR) Bodensee-Wasserversorgung |
format |
Article in Journal/Newspaper |
author |
Gilfedder, B. S. Lai, S. Petri, M. Biester, H. Hoffmann, T. |
author_facet |
Gilfedder, B. S. Lai, S. Petri, M. Biester, H. Hoffmann, T. |
author_sort |
Gilfedder, B. S. |
title |
Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases |
title_short |
Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases |
title_full |
Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases |
title_fullStr |
Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases |
title_full_unstemmed |
Iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases |
title_sort |
iodine speciation in rain, snow and aerosols and possible transfer of organically bound iodine species from aerosol to droplet phases |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00304128 https://hal.science/hal-00304128/document https://hal.science/hal-00304128/file/acpd-8-7977-2008.pdf |
long_lat |
ENVELOPE(155.883,155.883,-81.417,-81.417) |
geographic |
Patagonia Greenland New Zealand Mace |
geographic_facet |
Patagonia Greenland New Zealand Mace |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00304128 Atmospheric Chemistry and Physics Discussions, 2008, 8 (2), pp.7977-8008 |
op_relation |
hal-00304128 https://hal.science/hal-00304128 https://hal.science/hal-00304128/document https://hal.science/hal-00304128/file/acpd-8-7977-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334785114341376 |