Time Series of I-129 and I-127 Speciation in Precipitation from Denmark
Environmental 129I mainly released from reprocessing plants at La Hague (France) and Sellafield (UK) provides a unique atmospheric and environmental tracer. This study deals with 129I and 127I speciation in precipitation collected in Denmark during 2001−2006 that indicates many new findings. The con...
Published in: | Environmental Science & Technology |
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Language: | English |
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2009
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Online Access: | https://orbit.dtu.dk/en/publications/bd4a4603-44cb-4846-94b3-95193bf773f5 https://doi.org/10.1021/es9012678 |
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ftdtupubl:oai:pure.atira.dk:publications/bd4a4603-44cb-4846-94b3-95193bf773f5 2024-05-12T08:09:05+00:00 Time Series of I-129 and I-127 Speciation in Precipitation from Denmark Hou, Xiaolin Aldahan, Ala Nielsen, Sven Poul Possnert, Göran 2009 https://orbit.dtu.dk/en/publications/bd4a4603-44cb-4846-94b3-95193bf773f5 https://doi.org/10.1021/es9012678 eng eng https://orbit.dtu.dk/en/publications/bd4a4603-44cb-4846-94b3-95193bf773f5 info:eu-repo/semantics/restrictedAccess Hou , X , Aldahan , A , Nielsen , S P & Possnert , G 2009 , ' Time Series of I-129 and I-127 Speciation in Precipitation from Denmark ' , Environmental Science & Technology (Washington) , vol. 43 , no. 17 , pp. 6522-6528 . https://doi.org/10.1021/es9012678 Radioecology and tracer studies Nuclear technologies Radioøkologi og sporstofstudier Nukleare teknologier /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2009 ftdtupubl https://doi.org/10.1021/es9012678 2024-04-17T14:49:18Z Environmental 129I mainly released from reprocessing plants at La Hague (France) and Sellafield (UK) provides a unique atmospheric and environmental tracer. This study deals with 129I and 127I speciation in precipitation collected in Denmark during 2001−2006 that indicates many new findings. The concentrations of total 129I in precipitation vary from 0.28 to 5.63 × 109 atoms 129I L−1 with an average of (2.34 ± 1.43) × 109 atoms 129I L−1, and the annual deposition flux of 129I is (1.25 ± 0.30) × 1012 atoms m−2. Increased 129I levels in precipitation and 129I/127I ratio are attributed to the releases of 129I from the reprocessing plants at La Hague and Sellafield. Iodide is the major specie of 129I, which accounts for 50−99% of total 129I. The concentrations of total 127I vary from 0.78 to 2.70 μg iodine L−1 with an average of 1.63 ± 0.47 μg iodine L−1, and annual deposition flux of 0.95 ± 0.26 mg m−2. Unlike 129I, iodate is the major specie of 127I, which accounts for 43−93% of total 127I. The 129I/127I atomic ratios for total iodine vary from 5.04 to 76.5 × 10−8 with an average of (30.1 ± 16.8) × 10−8. These values are 10 times lower for iodate with an average of (2.95 ± 3.13) × 10−8. Seasonal variations of 129I/127I values and 129I concentrations are associated with highs in spring and lows in summer−autumn periods. Re-emission of 129I from the surface water of the English Channel, Irish Sea, North Sea, and Norwegian Sea, especially from the European continental coast areas, is evidently the major source of 129I in the precipitation, while stable 127I in the precipitation has multiple sources, i.e., marine, as well as terrestrial emission. This work shows that data on speciation of iodine isotopes can provide thorough indications about the sources and geochemical cycle despite the complicated atmospheric chemistry of iodine. Article in Journal/Newspaper Norwegian Sea Technical University of Denmark: DTU Orbit Norwegian Sea Environmental Science & Technology 43 17 6522 6528 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Radioecology and tracer studies Nuclear technologies Radioøkologi og sporstofstudier Nukleare teknologier /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Radioecology and tracer studies Nuclear technologies Radioøkologi og sporstofstudier Nukleare teknologier /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Hou, Xiaolin Aldahan, Ala Nielsen, Sven Poul Possnert, Göran Time Series of I-129 and I-127 Speciation in Precipitation from Denmark |
topic_facet |
Radioecology and tracer studies Nuclear technologies Radioøkologi og sporstofstudier Nukleare teknologier /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Environmental 129I mainly released from reprocessing plants at La Hague (France) and Sellafield (UK) provides a unique atmospheric and environmental tracer. This study deals with 129I and 127I speciation in precipitation collected in Denmark during 2001−2006 that indicates many new findings. The concentrations of total 129I in precipitation vary from 0.28 to 5.63 × 109 atoms 129I L−1 with an average of (2.34 ± 1.43) × 109 atoms 129I L−1, and the annual deposition flux of 129I is (1.25 ± 0.30) × 1012 atoms m−2. Increased 129I levels in precipitation and 129I/127I ratio are attributed to the releases of 129I from the reprocessing plants at La Hague and Sellafield. Iodide is the major specie of 129I, which accounts for 50−99% of total 129I. The concentrations of total 127I vary from 0.78 to 2.70 μg iodine L−1 with an average of 1.63 ± 0.47 μg iodine L−1, and annual deposition flux of 0.95 ± 0.26 mg m−2. Unlike 129I, iodate is the major specie of 127I, which accounts for 43−93% of total 127I. The 129I/127I atomic ratios for total iodine vary from 5.04 to 76.5 × 10−8 with an average of (30.1 ± 16.8) × 10−8. These values are 10 times lower for iodate with an average of (2.95 ± 3.13) × 10−8. Seasonal variations of 129I/127I values and 129I concentrations are associated with highs in spring and lows in summer−autumn periods. Re-emission of 129I from the surface water of the English Channel, Irish Sea, North Sea, and Norwegian Sea, especially from the European continental coast areas, is evidently the major source of 129I in the precipitation, while stable 127I in the precipitation has multiple sources, i.e., marine, as well as terrestrial emission. This work shows that data on speciation of iodine isotopes can provide thorough indications about the sources and geochemical cycle despite the complicated atmospheric chemistry of iodine. |
format |
Article in Journal/Newspaper |
author |
Hou, Xiaolin Aldahan, Ala Nielsen, Sven Poul Possnert, Göran |
author_facet |
Hou, Xiaolin Aldahan, Ala Nielsen, Sven Poul Possnert, Göran |
author_sort |
Hou, Xiaolin |
title |
Time Series of I-129 and I-127 Speciation in Precipitation from Denmark |
title_short |
Time Series of I-129 and I-127 Speciation in Precipitation from Denmark |
title_full |
Time Series of I-129 and I-127 Speciation in Precipitation from Denmark |
title_fullStr |
Time Series of I-129 and I-127 Speciation in Precipitation from Denmark |
title_full_unstemmed |
Time Series of I-129 and I-127 Speciation in Precipitation from Denmark |
title_sort |
time series of i-129 and i-127 speciation in precipitation from denmark |
publishDate |
2009 |
url |
https://orbit.dtu.dk/en/publications/bd4a4603-44cb-4846-94b3-95193bf773f5 https://doi.org/10.1021/es9012678 |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Norwegian Sea |
genre_facet |
Norwegian Sea |
op_source |
Hou , X , Aldahan , A , Nielsen , S P & Possnert , G 2009 , ' Time Series of I-129 and I-127 Speciation in Precipitation from Denmark ' , Environmental Science & Technology (Washington) , vol. 43 , no. 17 , pp. 6522-6528 . https://doi.org/10.1021/es9012678 |
op_relation |
https://orbit.dtu.dk/en/publications/bd4a4603-44cb-4846-94b3-95193bf773f5 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1021/es9012678 |
container_title |
Environmental Science & Technology |
container_volume |
43 |
container_issue |
17 |
container_start_page |
6522 |
op_container_end_page |
6528 |
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1798852246730964992 |