Effects of aluminum incorporation on the schwertmannite structure and surface properties

Schwertmannite is a common nanomineral in acid sulfate environments such as Acid Mine Drainage (AMD) and Acid Sulfate Soils (ASS). Its high surface area and positively charged surface result in a strong affinity towards toxic oxyanions such as arsenate in solution. However, natural precipitation of...

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Autores: Carrero Romero, Sergio, Fernández Martínez, Alejandro, Pérez López, Rafael, Cama, J., Dejoie, Catherine, Nieto Liñán, José Miguel
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/21991
Acceso en línea:https://hdl.handle.net/10272/21991
Access Level:acceso abierto
Palabra clave:Pollution
Aluminium
2506.11 Mineralogía
3308.11 Control de la Contaminación del Agua
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spelling Effects of aluminum incorporation on the schwertmannite structure and surface propertiesCarrero Romero, SergioFernández Martínez, AlejandroPérez López, RafaelCama, J.Dejoie, CatherineNieto Liñán, José MiguelPollutionAluminium2506.11 Mineralogía3308.11 Control de la Contaminación del AguaSchwertmannite is a common nanomineral in acid sulfate environments such as Acid Mine Drainage (AMD) and Acid Sulfate Soils (ASS). Its high surface area and positively charged surface result in a strong affinity towards toxic oxyanions such as arsenate in solution. However, natural precipitation of schwertmannite also involves the accumulation of other impurities, in particular aluminum, an element that is often incorporated into the structure of Fe-oxide minerals, such as goethite and ferrihydrite, affecting their structural and surface properties. However, little is known about the effect of Al incorporation in schwertmannite on the removal capacity of toxic oxyanions found in AMD and ASS (e.g. arsenate). In this paper, schwertmannite samples with variable Al concentration were synthetized and employed in arsenate adsorption isotherm experiments at a constant pH of 3.5. Solid samples before and after arsenate adsorption were characterized using high energy X-ray diffraction and pair distribution function analyses in order to identify structural differences correlated with the Al content as well as variations in the coordination of arsenate adsorbed on the mineral surface. These analyses showed limited Al accumulation on schwertmannite (up to 5%) with a low effect on its structure. The maximum arsenate sorption capacity (258 mmolH2AsO4 molFe-1) was in the range of that with pure schwertmannite, but a higher proportion of inner-sphere coordination was observed. Finally, Al was found to desorb from schwertmannite, with adsorbed arsenate preventing this effect and increasing the stability of the mineral. These results are useful to interpret observations from the field, in particular from river water affected by AMD and ASS, where similar conditions are observed, and where aluminum incorporation is expected.Royal Society of Chemistry20222022-06-1520222022-06-15journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10272/21991reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/219912026-06-02T14:58:11Z
dc.title.none.fl_str_mv Effects of aluminum incorporation on the schwertmannite structure and surface properties
title Effects of aluminum incorporation on the schwertmannite structure and surface properties
spellingShingle Effects of aluminum incorporation on the schwertmannite structure and surface properties
Carrero Romero, Sergio
Pollution
Aluminium
2506.11 Mineralogía
3308.11 Control de la Contaminación del Agua
title_short Effects of aluminum incorporation on the schwertmannite structure and surface properties
title_full Effects of aluminum incorporation on the schwertmannite structure and surface properties
title_fullStr Effects of aluminum incorporation on the schwertmannite structure and surface properties
title_full_unstemmed Effects of aluminum incorporation on the schwertmannite structure and surface properties
title_sort Effects of aluminum incorporation on the schwertmannite structure and surface properties
dc.creator.none.fl_str_mv Carrero Romero, Sergio
Fernández Martínez, Alejandro
Pérez López, Rafael
Cama, J.
Dejoie, Catherine
Nieto Liñán, José Miguel
author Carrero Romero, Sergio
author_facet Carrero Romero, Sergio
Fernández Martínez, Alejandro
Pérez López, Rafael
Cama, J.
Dejoie, Catherine
Nieto Liñán, José Miguel
author_role author
author2 Fernández Martínez, Alejandro
Pérez López, Rafael
Cama, J.
Dejoie, Catherine
Nieto Liñán, José Miguel
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Pollution
Aluminium
2506.11 Mineralogía
3308.11 Control de la Contaminación del Agua
topic Pollution
Aluminium
2506.11 Mineralogía
3308.11 Control de la Contaminación del Agua
description Schwertmannite is a common nanomineral in acid sulfate environments such as Acid Mine Drainage (AMD) and Acid Sulfate Soils (ASS). Its high surface area and positively charged surface result in a strong affinity towards toxic oxyanions such as arsenate in solution. However, natural precipitation of schwertmannite also involves the accumulation of other impurities, in particular aluminum, an element that is often incorporated into the structure of Fe-oxide minerals, such as goethite and ferrihydrite, affecting their structural and surface properties. However, little is known about the effect of Al incorporation in schwertmannite on the removal capacity of toxic oxyanions found in AMD and ASS (e.g. arsenate). In this paper, schwertmannite samples with variable Al concentration were synthetized and employed in arsenate adsorption isotherm experiments at a constant pH of 3.5. Solid samples before and after arsenate adsorption were characterized using high energy X-ray diffraction and pair distribution function analyses in order to identify structural differences correlated with the Al content as well as variations in the coordination of arsenate adsorbed on the mineral surface. These analyses showed limited Al accumulation on schwertmannite (up to 5%) with a low effect on its structure. The maximum arsenate sorption capacity (258 mmolH2AsO4 molFe-1) was in the range of that with pure schwertmannite, but a higher proportion of inner-sphere coordination was observed. Finally, Al was found to desorb from schwertmannite, with adsorbed arsenate preventing this effect and increasing the stability of the mineral. These results are useful to interpret observations from the field, in particular from river water affected by AMD and ASS, where similar conditions are observed, and where aluminum incorporation is expected.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-06-15
2022
2022-06-15
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10272/21991
url https://hdl.handle.net/10272/21991
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
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 Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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