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Tytuł:
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First discrete iron(II) records from Dome C (Antarctica) and the Holtedahlfonna glacier (Svalbard).
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Autorzy:
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Burgay F; Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy. Electronic address: .
Barbaro E; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy; Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy.
Cappelletti D; Università degli Studi di Perugia, Dipartimento di Chimica, Biologia e Biotecnologie, Via Elce di Sotto 8, Perugia, Italy.
Turetta C; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy.
Gallet JC; Norwegian Polar Institute, Tromsø NO-9296, Norway.
Isaksson E; Norwegian Polar Institute, Tromsø NO-9296, Norway.
Stenni B; Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy.
Dreossi G; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy.
Scoto F; Institute of Atmospheric Sciences and Climate, National Research Council, Lecce, Italy.
Barbante C; Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy.
Spolaor A; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy; Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy.
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Źródło:
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Chemosphere [Chemosphere] 2021 Mar; Vol. 267, pp. 129335. Date of Electronic Publication: 2020 Dec 15.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Oxford : Elsevier Science Ltd
Original Publication: Oxford, New York, : Pergamon Press.
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MeSH Terms:
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Ice Cover*
Iron*
Antarctic Regions ; Arctic Regions ; Ferrous Compounds ; Reproducibility of Results ; Svalbard
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Contributed Indexing:
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Keywords: Chemiluminescence; Dome C; Ice core; Iron speciation; Svalbard
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Substance Nomenclature:
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0 (Ferrous Compounds)
E1UOL152H7 (Iron)
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Entry Date(s):
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Date Created: 20201222 Date Completed: 20210121 Latest Revision: 20210121
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Update Code:
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20240105
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DOI:
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10.1016/j.chemosphere.2020.129335
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PMID:
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33352366
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Fe(II) is more soluble and bioavailable than Fe(III) species, therefore the investigation of their relative abundance and redox processes is relevant to better assess the supply of bioavailable iron to the ocean and its impact on marine productivity. In this context, we present a discrete chemiluminescence-based method for the determination of Fe(II) in firn matrices. The method was applied on discrete samples from a snow pit collected at Dome C (DC, Antarctica) and on a shallow firn core from the Holtedahlfonna glacier (HDF, Svalbard), providing the first Fe(II) record from both Antarctica and Svalbard. The method showed low detection limits (0.006 ng g -1 for DC and 0.003 ng g -1 for the HDF) and a precision ranging from 3% to 20% RSD. Fe(II) concentrations ranged between the LoD and 0.077 ng g -1 and between the LoD and 0.300 ng g -1 for the Antarctic and Arctic samples, respectively. The Fe(II) contribution with respect to the total dissolved Fe was comparable in both sites accounting, on average, for 5% and 3%, respectively. We found that Fe(II) correctly identified the Pinatubo/Cerro Hudson eruption in the DC record, demonstrating its reliability as volcanic tracer, while, on the HDF core, we provided the first preliminary insight on the processes that might influence Fe speciation in firn matrices (i.e. organic ligands and pH influences).
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
