Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/49149 |
Resumo: | The interaction of biofilms with metallic surfaces produces two biologically induced degradation processes of materials: microbial induced corrosion and bioleaching. Both phenomena affect most metallic materials, but in the case of noble metals such as gold, which is inert to corrosion, metallophilic bacteria can cause its direct or in direct dissolution. When this process is controlled, it can be used for hydrometallurgical applications, such as the recovery of precious metals from electronic waste. However, the presence of unwanted bioleaching-producing bacteria can be detrimental to metallic materials in specific environments. In this work, we propose the use of single-layer graphene as a protective coating to reduce Au bioleaching by Cupriavidus metallidurans, a strain adapted to metal contaminated environments and capable of dissolving Au. By means of Scanning Tunneling Microscopy, we demonstrate that graphene coatings are an effective barrier to prevent the complex interactions responsible for Au dissolution. This behavior can be understood in terms of graphene pore size, which creates an impermeable barrier that prevents the pass of Au-complexing ligands produced by C.metallidurans through graphene coating. In addition, changes in surface energy and electrostatic interaction are presumably reducing bacterial adhesion to graphene-coated Au surfaces. Our findings provide a novel approach to reduce the deterioration of metallic materials in devices in environments where biofilms have been found to cause unwanted bioleaching. |
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Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of goldGrapheneCupriavidus metalliduransBiofilmsGold - BioleachingMetal - DissolutionGrafenoBiofilmesOuro - BiolixiviaçãoMetais - DissoluçãoThe interaction of biofilms with metallic surfaces produces two biologically induced degradation processes of materials: microbial induced corrosion and bioleaching. Both phenomena affect most metallic materials, but in the case of noble metals such as gold, which is inert to corrosion, metallophilic bacteria can cause its direct or in direct dissolution. When this process is controlled, it can be used for hydrometallurgical applications, such as the recovery of precious metals from electronic waste. However, the presence of unwanted bioleaching-producing bacteria can be detrimental to metallic materials in specific environments. In this work, we propose the use of single-layer graphene as a protective coating to reduce Au bioleaching by Cupriavidus metallidurans, a strain adapted to metal contaminated environments and capable of dissolving Au. By means of Scanning Tunneling Microscopy, we demonstrate that graphene coatings are an effective barrier to prevent the complex interactions responsible for Au dissolution. This behavior can be understood in terms of graphene pore size, which creates an impermeable barrier that prevents the pass of Au-complexing ligands produced by C.metallidurans through graphene coating. In addition, changes in surface energy and electrostatic interaction are presumably reducing bacterial adhesion to graphene-coated Au surfaces. Our findings provide a novel approach to reduce the deterioration of metallic materials in devices in environments where biofilms have been found to cause unwanted bioleaching.Multidisciplinary Digital Publishing Institute - MDPI2022-02-02T19:20:29Z2022-02-02T19:20:29Z2021-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfPARRA, C. et al. Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold. Metals, Basel, v. 11, n. 1, 2021. DOI: 10.3390/met11010147.http://repositorio.ufla.br/jspui/handle/1/49149Metalsreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessParra, CarolinaAristizabal, JulietArce, BárbaraMontero-Silva, FranciscoLascano, SheilaHenriquez, RicardoLazcano, PaolaGiraldo-Gallo, PaulaRamírez, CristianCunha, Thiago Henrique Rodrigues daBrito, Angela Barrera deeng2023-05-26T19:38:01Zoai:localhost:1/49149Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-26T19:38:01Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold |
title |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold |
spellingShingle |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold Parra, Carolina Graphene Cupriavidus metallidurans Biofilms Gold - Bioleaching Metal - Dissolution Grafeno Biofilmes Ouro - Biolixiviação Metais - Dissolução |
title_short |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold |
title_full |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold |
title_fullStr |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold |
title_full_unstemmed |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold |
title_sort |
Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold |
author |
Parra, Carolina |
author_facet |
Parra, Carolina Aristizabal, Juliet Arce, Bárbara Montero-Silva, Francisco Lascano, Sheila Henriquez, Ricardo Lazcano, Paola Giraldo-Gallo, Paula Ramírez, Cristian Cunha, Thiago Henrique Rodrigues da Brito, Angela Barrera de |
author_role |
author |
author2 |
Aristizabal, Juliet Arce, Bárbara Montero-Silva, Francisco Lascano, Sheila Henriquez, Ricardo Lazcano, Paola Giraldo-Gallo, Paula Ramírez, Cristian Cunha, Thiago Henrique Rodrigues da Brito, Angela Barrera de |
author2_role |
author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Parra, Carolina Aristizabal, Juliet Arce, Bárbara Montero-Silva, Francisco Lascano, Sheila Henriquez, Ricardo Lazcano, Paola Giraldo-Gallo, Paula Ramírez, Cristian Cunha, Thiago Henrique Rodrigues da Brito, Angela Barrera de |
dc.subject.por.fl_str_mv |
Graphene Cupriavidus metallidurans Biofilms Gold - Bioleaching Metal - Dissolution Grafeno Biofilmes Ouro - Biolixiviação Metais - Dissolução |
topic |
Graphene Cupriavidus metallidurans Biofilms Gold - Bioleaching Metal - Dissolution Grafeno Biofilmes Ouro - Biolixiviação Metais - Dissolução |
description |
The interaction of biofilms with metallic surfaces produces two biologically induced degradation processes of materials: microbial induced corrosion and bioleaching. Both phenomena affect most metallic materials, but in the case of noble metals such as gold, which is inert to corrosion, metallophilic bacteria can cause its direct or in direct dissolution. When this process is controlled, it can be used for hydrometallurgical applications, such as the recovery of precious metals from electronic waste. However, the presence of unwanted bioleaching-producing bacteria can be detrimental to metallic materials in specific environments. In this work, we propose the use of single-layer graphene as a protective coating to reduce Au bioleaching by Cupriavidus metallidurans, a strain adapted to metal contaminated environments and capable of dissolving Au. By means of Scanning Tunneling Microscopy, we demonstrate that graphene coatings are an effective barrier to prevent the complex interactions responsible for Au dissolution. This behavior can be understood in terms of graphene pore size, which creates an impermeable barrier that prevents the pass of Au-complexing ligands produced by C.metallidurans through graphene coating. In addition, changes in surface energy and electrostatic interaction are presumably reducing bacterial adhesion to graphene-coated Au surfaces. Our findings provide a novel approach to reduce the deterioration of metallic materials in devices in environments where biofilms have been found to cause unwanted bioleaching. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01 2022-02-02T19:20:29Z 2022-02-02T19:20:29Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
PARRA, C. et al. Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold. Metals, Basel, v. 11, n. 1, 2021. DOI: 10.3390/met11010147. http://repositorio.ufla.br/jspui/handle/1/49149 |
identifier_str_mv |
PARRA, C. et al. Graphene coating as an effective barrier to prevent bacteria-mediated dissolution of gold. Metals, Basel, v. 11, n. 1, 2021. DOI: 10.3390/met11010147. |
url |
http://repositorio.ufla.br/jspui/handle/1/49149 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute - MDPI |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute - MDPI |
dc.source.none.fl_str_mv |
Metals reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835134929403904 |