Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions

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 s...

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Authors: Benaiges-Fernandez, Robert, Palau, Jordi, Offeddu, Francesco, Cama i Robert, Jordi, Urmeneta, Jordi, Soler, Josep M., Doldd, Bernhard
Format: article
Status:Versión aceptada para publicación
Publication Date:2019
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/155941
Online Access:https://hdl.handle.net/2445/155941
Access Level:Open access
Keyword:Sediments marins
Ferro
Marine sediments
Iron
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spelling Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditionsBenaiges-Fernandez, RobertPalau, JordiOffeddu, FrancescoCama i Robert, JordiUrmeneta, JordiSoler, Josep M.Doldd, BernhardSediments marinsFerroMarine sedimentsIronShewanella 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.Elsevier B.V.2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/155941Articles publicats en revistes (Genètica, Microbiologia i Estadística)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1016/j.marenvres.2019.104782Marine Environmental Research, 2019, vol. 151https://doi.org/10.1016/j.marenvres.2019.104782cc-by-nc-nd (c) Elsevier B.V., 2019http://creativecommons.org/licenses/by-nc-nd/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1559412026-05-27T06:46:51Z
dc.title.none.fl_str_mv Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
title Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
spellingShingle Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
Benaiges-Fernandez, Robert
Sediments marins
Ferro
Marine sediments
Iron
title_short Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
title_full Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
title_fullStr Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
title_full_unstemmed Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
title_sort Dissimilatory bioreduction of iron (III) oxides by Shewanella loihica under marine sediment conditions
dc.creator.none.fl_str_mv Benaiges-Fernandez, Robert
Palau, Jordi
Offeddu, Francesco
Cama i Robert, Jordi
Urmeneta, Jordi
Soler, Josep M.
Doldd, Bernhard
author Benaiges-Fernandez, Robert
author_facet Benaiges-Fernandez, Robert
Palau, Jordi
Offeddu, Francesco
Cama i Robert, Jordi
Urmeneta, Jordi
Soler, Josep M.
Doldd, Bernhard
author_role author
author2 Palau, Jordi
Offeddu, Francesco
Cama i Robert, Jordi
Urmeneta, Jordi
Soler, Josep M.
Doldd, Bernhard
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Sediments marins
Ferro
Marine sediments
Iron
topic Sediments marins
Ferro
Marine sediments
Iron
description 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.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/155941
url https://hdl.handle.net/2445/155941
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.marenvres.2019.104782
Marine Environmental Research, 2019, vol. 151
https://doi.org/10.1016/j.marenvres.2019.104782
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier B.V., 2019
http://creativecommons.org/licenses/by-nc-nd/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier B.V., 2019
http://creativecommons.org/licenses/by-nc-nd/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Genètica, Microbiologia i Estadística)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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