Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters
International audience Biodegradation and photolysis of dissolved organic matter (DOM) in boreal high-latitude waters are the two main factors controlling not only the aquatic fluxes and residence time of carbon but also metal nutrients associated with DOM such as Fe. The DOM is usually present in t...
Published in: | Environmental Science & Technology |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.science/hal-02399037 https://hal.science/hal-02399037v2/document https://hal.science/hal-02399037v2/file/es-2019-00925c_REVISED_FINAL%20for%20HAL.pdf https://doi.org/10.1021/acs.est.9b02797 |
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ftinsu:oai:HAL:hal-02399037v2 |
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openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
size fractionation complexation organic carbon Arctic sunlight photolysis Fe heterotrophic bacteria oxidation precipitation [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [CHIM.OTHE]Chemical Sciences/Other |
spellingShingle |
size fractionation complexation organic carbon Arctic sunlight photolysis Fe heterotrophic bacteria oxidation precipitation [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [CHIM.OTHE]Chemical Sciences/Other Oleinikova, Olga Poitrasson, Franck Drozdova, Olga Yu. Shirokova, Liudmila Lapitskiy, Sergey Pokrovsky, Oleg Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters |
topic_facet |
size fractionation complexation organic carbon Arctic sunlight photolysis Fe heterotrophic bacteria oxidation precipitation [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [CHIM.OTHE]Chemical Sciences/Other |
description |
International audience Biodegradation and photolysis of dissolved organic matter (DOM) in boreal high-latitude waters are the two main factors controlling not only the aquatic fluxes and residence time of carbon but also metal nutrients associated with DOM such as Fe. The DOM is usually present in the form of organic and organomineral colloids, which also account for the majority of dissolved Fe. Here, we use the stable Fe isotope approach to unravel the processes controlling Fe behavior during bio- and photodegradation of colloids in boreal Fe- and DOM-rich humic waters (a stream and a fen). The adsorption of Fe colloids onto heterotrophic bacteria Pseudomonas aureofaciens produced enrichment in +0.4‰ (δ57Fe) in the heavier isotopes of the cell surface relative to the remaining solution. In contrast, long-term assimilation of Fe by live cells yielded preferential incorporation of lighter isotopes into the cells (−0.7‰ relative to aqueous solution). The sunlight-induced oxidation of Fe(II) in fen water led to the removal of heavier Fe isotopes (+1.5 to +2.5‰) from solution, consistent with Fe(III) hydroxide precipitation from Fe(II)-bearing solution. Altogether, bio- and photodegradation of organoferric colloids, occurring within a few days of exposure time, can produce several per mil isotopic excursions in shallow lentic and lothic inland waters of high-latitude boreal regions. Considerable daily scale variations of Fe isotopic composition should therefore be taken into account during the interpretation of the riverine flux of Fe isotopes to the ocean or tracing weathering processes using Fe isotopes in surface waters at high latitudes |
author2 |
Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Lomonosov Moscow State University (MSU) N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch (FECIAR UrB RAS ) Russian Academy of Sciences - Chernogolovka |
format |
Article in Journal/Newspaper |
author |
Oleinikova, Olga Poitrasson, Franck Drozdova, Olga Yu. Shirokova, Liudmila Lapitskiy, Sergey Pokrovsky, Oleg |
author_facet |
Oleinikova, Olga Poitrasson, Franck Drozdova, Olga Yu. Shirokova, Liudmila Lapitskiy, Sergey Pokrovsky, Oleg |
author_sort |
Oleinikova, Olga |
title |
Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters |
title_short |
Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters |
title_full |
Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters |
title_fullStr |
Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters |
title_full_unstemmed |
Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters |
title_sort |
iron isotope fractionation during bio- and photodegradation of organoferric colloids in boreal humic waters |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02399037 https://hal.science/hal-02399037v2/document https://hal.science/hal-02399037v2/file/es-2019-00925c_REVISED_FINAL%20for%20HAL.pdf https://doi.org/10.1021/acs.est.9b02797 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0013-936X EISSN: 1520-5851 Environmental Science and Technology https://hal.science/hal-02399037 Environmental Science and Technology, 2019, 53 (19), pp.11183-11194. ⟨10.1021/acs.est.9b02797⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.est.9b02797 hal-02399037 https://hal.science/hal-02399037 https://hal.science/hal-02399037v2/document https://hal.science/hal-02399037v2/file/es-2019-00925c_REVISED_FINAL%20for%20HAL.pdf doi:10.1021/acs.est.9b02797 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1021/acs.est.9b02797 |
container_title |
Environmental Science & Technology |
container_volume |
53 |
container_issue |
19 |
container_start_page |
11183 |
op_container_end_page |
11194 |
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1785578215295680512 |
spelling |
ftinsu:oai:HAL:hal-02399037v2 2023-12-17T10:26:30+01:00 Iron Isotope Fractionation during Bio- and Photodegradation of Organoferric Colloids in Boreal Humic Waters Oleinikova, Olga Poitrasson, Franck Drozdova, Olga Yu. Shirokova, Liudmila Lapitskiy, Sergey Pokrovsky, Oleg Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Lomonosov Moscow State University (MSU) N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch (FECIAR UrB RAS ) Russian Academy of Sciences - Chernogolovka 2019 https://hal.science/hal-02399037 https://hal.science/hal-02399037v2/document https://hal.science/hal-02399037v2/file/es-2019-00925c_REVISED_FINAL%20for%20HAL.pdf https://doi.org/10.1021/acs.est.9b02797 en eng HAL CCSD American Chemical Society info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.est.9b02797 hal-02399037 https://hal.science/hal-02399037 https://hal.science/hal-02399037v2/document https://hal.science/hal-02399037v2/file/es-2019-00925c_REVISED_FINAL%20for%20HAL.pdf doi:10.1021/acs.est.9b02797 info:eu-repo/semantics/OpenAccess ISSN: 0013-936X EISSN: 1520-5851 Environmental Science and Technology https://hal.science/hal-02399037 Environmental Science and Technology, 2019, 53 (19), pp.11183-11194. ⟨10.1021/acs.est.9b02797⟩ size fractionation complexation organic carbon Arctic sunlight photolysis Fe heterotrophic bacteria oxidation precipitation [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [CHIM.OTHE]Chemical Sciences/Other info:eu-repo/semantics/article Journal articles 2019 ftinsu https://doi.org/10.1021/acs.est.9b02797 2023-11-22T17:35:01Z International audience Biodegradation and photolysis of dissolved organic matter (DOM) in boreal high-latitude waters are the two main factors controlling not only the aquatic fluxes and residence time of carbon but also metal nutrients associated with DOM such as Fe. The DOM is usually present in the form of organic and organomineral colloids, which also account for the majority of dissolved Fe. Here, we use the stable Fe isotope approach to unravel the processes controlling Fe behavior during bio- and photodegradation of colloids in boreal Fe- and DOM-rich humic waters (a stream and a fen). The adsorption of Fe colloids onto heterotrophic bacteria Pseudomonas aureofaciens produced enrichment in +0.4‰ (δ57Fe) in the heavier isotopes of the cell surface relative to the remaining solution. In contrast, long-term assimilation of Fe by live cells yielded preferential incorporation of lighter isotopes into the cells (−0.7‰ relative to aqueous solution). The sunlight-induced oxidation of Fe(II) in fen water led to the removal of heavier Fe isotopes (+1.5 to +2.5‰) from solution, consistent with Fe(III) hydroxide precipitation from Fe(II)-bearing solution. Altogether, bio- and photodegradation of organoferric colloids, occurring within a few days of exposure time, can produce several per mil isotopic excursions in shallow lentic and lothic inland waters of high-latitude boreal regions. Considerable daily scale variations of Fe isotopic composition should therefore be taken into account during the interpretation of the riverine flux of Fe isotopes to the ocean or tracing weathering processes using Fe isotopes in surface waters at high latitudes Article in Journal/Newspaper Arctic Institut national des sciences de l'Univers: HAL-INSU Arctic Environmental Science & Technology 53 19 11183 11194 |