Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations
Speciation analysis of iodine in aerosols is a very useful approach for understanding geochemical cycling of iodine in the atmosphere. In this study, overall iodine species, including water-soluble iodine species (iodide, iodate and water-soluble organic iodine), NaOH-soluble iodine, and insoluble i...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00043911 2023-05-15T17:37:08+02:00 Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations Zhang, Luyuan Hou, Xiaolin Xu, Sheng 2016-02 electronic https://doi.org/10.5194/acp-16-1971-2016 https://noa.gwlb.de/receive/cop_mods_00043911 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043531/acp-16-1971-2016.pdf https://acp.copernicus.org/articles/16/1971/2016/acp-16-1971-2016.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-16-1971-2016 https://noa.gwlb.de/receive/cop_mods_00043911 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043531/acp-16-1971-2016.pdf https://acp.copernicus.org/articles/16/1971/2016/acp-16-1971-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/acp-16-1971-2016 2022-02-08T22:40:22Z Speciation analysis of iodine in aerosols is a very useful approach for understanding geochemical cycling of iodine in the atmosphere. In this study, overall iodine species, including water-soluble iodine species (iodide, iodate and water-soluble organic iodine), NaOH-soluble iodine, and insoluble iodine have been determined for 129I and 127I in the aerosols collected at Risø, Denmark, during March and May 2011 (shortly after the Fukushima nuclear accident) and in December 2014. The measured concentrations of total iodine are in the range of 1.04–2.48 ng m−3 for 127I and (11.3–97.0) × 105 atoms m−3 for 129I, corresponding to 129I ∕ 127I atomic ratios of (17.8–86.8) × 10−8. The contribution of Fukushima-derived 129I (peak value of 6.3 × 104 atoms m−3) is estimated to be negligible (less than 6 %) compared to the total 129I concentration in northern Europe. The concentrations and species of 129I and 127I in the aerosols are found to be strongly related to their sources and atmospheric pathways. Aerosols that were transported over the contaminated seas contained higher concentrations of 129I than aerosols transported over the European continent. The high 129I concentrations of the marine aerosols are attributed to secondary emission of marine discharged 129I in the contaminated seawater in the North Sea, North Atlantic Ocean, English Channel, Kattegat, etc., rather than direct gaseous release from the European nuclear reprocessing plants (NRPs). Water-soluble iodine was found to be a minor fraction to the total iodine for both 127I (7.8–13.7 %) and 129I (6.5–14.1 %) in ocean-derived aerosols, but accounted for 20.2–30.3 % for 127I and 25.6–29.5 % for 129I in land-derived aerosols. Iodide was the predominant form of water-soluble iodine, accounting for more than 97 % of the water-soluble iodine. NaOH-soluble iodine seems to be independent of the sources of aerosols. The significant proportion of 129I and 127I found in NaOH-soluble fractions is likely bound with organic substances. In contrast to water-soluble iodine, the sources of air masses exerted distinct influences on insoluble iodine for both 129I and 127I, with higher values for marine air masses and lower values for terrestrial air masses. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA Fukushima Kattegat ENVELOPE(9.692,9.692,63.563,63.563) Atmospheric Chemistry and Physics 16 4 1971 1985 |
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article Verlagsveröffentlichung Zhang, Luyuan Hou, Xiaolin Xu, Sheng Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations |
topic_facet |
article Verlagsveröffentlichung |
description |
Speciation analysis of iodine in aerosols is a very useful approach for understanding geochemical cycling of iodine in the atmosphere. In this study, overall iodine species, including water-soluble iodine species (iodide, iodate and water-soluble organic iodine), NaOH-soluble iodine, and insoluble iodine have been determined for 129I and 127I in the aerosols collected at Risø, Denmark, during March and May 2011 (shortly after the Fukushima nuclear accident) and in December 2014. The measured concentrations of total iodine are in the range of 1.04–2.48 ng m−3 for 127I and (11.3–97.0) × 105 atoms m−3 for 129I, corresponding to 129I ∕ 127I atomic ratios of (17.8–86.8) × 10−8. The contribution of Fukushima-derived 129I (peak value of 6.3 × 104 atoms m−3) is estimated to be negligible (less than 6 %) compared to the total 129I concentration in northern Europe. The concentrations and species of 129I and 127I in the aerosols are found to be strongly related to their sources and atmospheric pathways. Aerosols that were transported over the contaminated seas contained higher concentrations of 129I than aerosols transported over the European continent. The high 129I concentrations of the marine aerosols are attributed to secondary emission of marine discharged 129I in the contaminated seawater in the North Sea, North Atlantic Ocean, English Channel, Kattegat, etc., rather than direct gaseous release from the European nuclear reprocessing plants (NRPs). Water-soluble iodine was found to be a minor fraction to the total iodine for both 127I (7.8–13.7 %) and 129I (6.5–14.1 %) in ocean-derived aerosols, but accounted for 20.2–30.3 % for 127I and 25.6–29.5 % for 129I in land-derived aerosols. Iodide was the predominant form of water-soluble iodine, accounting for more than 97 % of the water-soluble iodine. NaOH-soluble iodine seems to be independent of the sources of aerosols. The significant proportion of 129I and 127I found in NaOH-soluble fractions is likely bound with organic substances. In contrast to water-soluble iodine, the sources of air masses exerted distinct influences on insoluble iodine for both 129I and 127I, with higher values for marine air masses and lower values for terrestrial air masses. |
format |
Article in Journal/Newspaper |
author |
Zhang, Luyuan Hou, Xiaolin Xu, Sheng |
author_facet |
Zhang, Luyuan Hou, Xiaolin Xu, Sheng |
author_sort |
Zhang, Luyuan |
title |
Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations |
title_short |
Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations |
title_full |
Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations |
title_fullStr |
Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations |
title_full_unstemmed |
Speciation of 127I and 129I in atmospheric aerosols at Risø, Denmark: insight into sources of iodine isotopes and their species transformations |
title_sort |
speciation of 127i and 129i in atmospheric aerosols at risø, denmark: insight into sources of iodine isotopes and their species transformations |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-1971-2016 https://noa.gwlb.de/receive/cop_mods_00043911 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043531/acp-16-1971-2016.pdf https://acp.copernicus.org/articles/16/1971/2016/acp-16-1971-2016.pdf |
long_lat |
ENVELOPE(9.692,9.692,63.563,63.563) |
geographic |
Fukushima Kattegat |
geographic_facet |
Fukushima Kattegat |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-16-1971-2016 https://noa.gwlb.de/receive/cop_mods_00043911 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043531/acp-16-1971-2016.pdf https://acp.copernicus.org/articles/16/1971/2016/acp-16-1971-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-16-1971-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
4 |
container_start_page |
1971 |
op_container_end_page |
1985 |
_version_ |
1766136884087488512 |