Dissimilatory bioreduction of iron(III) oxides by Shewanella loihica under marine sediment conditions
Document identifier: oai:DiVA.org:ltu-75958
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10.1016/j.marenvres.2019.104782Keyword: Natural Sciences,
Earth and Related Environmental Sciences,
Geochemistry,
Naturvetenskap,
Geovetenskap och miljövetenskap,
Geokemi,
Iron bioreduction,
Marine sediment,
Iron oxide,
Dissolution,
Shewanella loihica,
Applied Geochemistry,
Tillämpad geokemiPublication year: 2019Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: Shewanella is a genus of marine bacteria capable of dissimilatory iron reduction (DIR). In the context of deep-sea mining activities or submarine mine tailings disposal, dissimilatory iron reducing bacteria may play an important role in biogeochemical reactions concerning iron oxides placed on the sea bed. In this study, batch experiments were performed to evaluate the capacity of Shewanella loihica PV-4 to bioreduce different iron oxides (ferrihydrite, magnetite, goethite and hematite) under conditions similar to those in anaerobic sea sediments. Results showed that bioreduction of structural Fe(III) via oxidation of labile organic matter occurred in all these iron oxides. Based on the aqueous Fe (II) released, derived Fe(II)/acetate ratios and bioreduction coefficients seem to be only up to about 4% of the theoretical ones, considering the ideal stoichiometry of the reaction. A loss of aqueous Fe (II) was caused by adsorption and mineral transformation processes. Scanning electron microscope images showed that Shewanella lohica was attached to the Fe(III)-oxide surfaces during bioreduction. Our findings suggest that DIR of Fe(III) oxides from mine waste placed in marine environments could result in adverse ecological impacts such as liberation of trace metals in the environment.
Authors
Robert Benaiges-Fernandez
Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Catalonia, Spain. Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Barcelona, Catalonia, Spain
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Jordi Palau
Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Barcelona, Catalonia, Spain. Department of Mineralogy, Petrology and Applied Geology, Universitat de Barcelona, Barcelona, Catalonia, Spain
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Francesco G. Offeddu
Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Barcelona, Catalonia, Spain
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Jordi Cama
Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Barcelona, Catalonia, Spain
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Jordi Urmeneta
Department of Genetics, Microbiology and Statistics, Universitat de Barcelona, Barcelona, Catalonia, Spain. Biodiversity Research Institute (IRBio), Universitat de Barcelona, Barcelona, Catalonia, Spain
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Josep M. Soler
Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Barcelona, Catalonia, Spain
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Bernhard Dold
Luleå tekniska universitet; Geovetenskap och miljöteknik; Sustainable Mining Research & Consultancy EIRL, San Pedro de La Paz, Chile
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header:
identifier: oai:DiVA.org:ltu-75958
datestamp: 2021-04-19T12:51:07Z
setSpec: SwePub-ltu
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recordContentSource: ltu
recordCreationDate: 2019-09-11
identifier:
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75958
10.1016/j.marenvres.2019.104782
31514974
2-s2.0-85071869264
titleInfo:
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lang: eng
title: Dissimilatory bioreduction of iron(III) oxides by Shewanella loihica under marine sediment conditions
abstract: Shewanella is a genus of marine bacteria capable of dissimilatory iron reduction (DIR). In the context of deep-sea mining activities or submarine mine tailings disposal dissimilatory iron reducing bacteria may play an important role in biogeochemical reactions concerning iron oxides placed on the sea bed. In this study batch experiments were performed to evaluate the capacity of Shewanella loihica PV-4 to bioreduce different iron oxides (ferrihydrite magnetite goethite and hematite) under conditions similar to those in anaerobic sea sediments. Results showed that bioreduction of structural Fe(III) via oxidation of labile organic matter occurred in all these iron oxides. Based on the aqueous Fe (II) released derived Fe(II)/acetate ratios and bioreduction coefficients seem to be only up to about 4% of the theoretical ones considering the ideal stoichiometry of the reaction. A loss of aqueous Fe (II) was caused by adsorption and mineral transformation processes. Scanning electron microscope images showed that Shewanella lohica was attached to the Fe(III)-oxide surfaces during bioreduction. Our findings suggest that DIR of Fe(III) oxides from mine waste placed in marine environments could result in adverse ecological impacts such as liberation of trace metals in the environment.
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lang: eng
authority: uka.se
topic:
Natural Sciences
Earth and Related Environmental Sciences
Geochemistry
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lang: swe
authority: uka.se
topic:
Naturvetenskap
Geovetenskap och miljövetenskap
Geokemi
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lang: eng
topic: Iron bioreduction
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lang: eng
topic: Marine sediment
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lang: eng
topic: Iron oxide
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lang: eng
topic: Dissolution
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lang: eng
topic: Shewanella loihica
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lang: eng
authority: ltu
topic: Applied Geochemistry
genre: Research subject
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authority: ltu
topic: Tillämpad geokemi
genre: Research subject
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Published
7
Validerad;2019;Nivå 2;2019-12-06 (johcin)
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Benaiges-Fernandez
Robert
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affiliation: Department of Genetics Microbiology and Statistics Universitat de Barcelona Barcelona Catalonia Spain. Institute of Environmental Assessment and Water Research (IDAEA CSIC) Barcelona Catalonia Spain
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Palau
Jordi
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affiliation: Institute of Environmental Assessment and Water Research (IDAEA CSIC) Barcelona Catalonia Spain. Department of Mineralogy Petrology and Applied Geology Universitat de Barcelona Barcelona Catalonia Spain
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Offeddu
Francesco G.
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affiliation: Institute of Environmental Assessment and Water Research (IDAEA CSIC) Barcelona Catalonia Spain
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Cama
Jordi
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Jordi
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Josep M.
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affiliation: Institute of Environmental Assessment and Water Research (IDAEA CSIC) Barcelona Catalonia Spain
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Dold
Bernhard
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Luleå tekniska universitet
Geovetenskap och miljöteknik
Sustainable Mining Research & Consultancy EIRL San Pedro de La Paz Chile
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dateIssued: 2019
publisher: Elsevier
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title: Marine Environmental Research
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0141-1136
1879-0291
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number: 104782
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