Adsorption of rare earth elements in regolith-hosted clay deposits

Global resources of heavy Rare Earth Elements (REE) are dominantly sourced from Chinese regolith-hosted ion-adsorption deposits in which the REE are inferred to be weakly adsorbed onto clay minerals. Similar deposits elsewhere might provide alternative supply for these high-tech metals, but the adso...

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Autores: Borst, Anouk M., Smith, Martin P., Finch, Adrian A., Estrade, Guillaume, Villanova de Benavent, Cristina, Nason, Peter, Marquis, Eva, Horsburgh, Nicola J., Goodenough, Kathryn M., Xu, Cheng, Kynický, Jindř, Geraki, Kalotina
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/179165
Acceso en línea:https://hdl.handle.net/2445/179165
Access Level:acceso abierto
Palabra clave:Espectroscòpia de raigs X
Minerals d'argila
Xina
X-ray spectroscopy
Clay minerals
China
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spelling Adsorption of rare earth elements in regolith-hosted clay depositsBorst, Anouk M.Smith, Martin P.Finch, Adrian A.Estrade, GuillaumeVillanova de Benavent, CristinaNason, PeterMarquis, EvaHorsburgh, Nicola J.Goodenough, Kathryn M.Xu, ChengKynický, JindřGeraki, KalotinaEspectroscòpia de raigs XMinerals d'argilaXinaX-ray spectroscopyClay mineralsChinaGlobal resources of heavy Rare Earth Elements (REE) are dominantly sourced from Chinese regolith-hosted ion-adsorption deposits in which the REE are inferred to be weakly adsorbed onto clay minerals. Similar deposits elsewhere might provide alternative supply for these high-tech metals, but the adsorption mechanisms remain unclear and the adsorbed state of REE to clays has never been demonstrated in situ. This study compares the mineralogy and speciation of REE in economic weathering profiles from China to prospective regoliths developed on peralkaline rocks from Madagascar. We use synchrotron X-ray absorption spectroscopy to study the distribution and local bonding environment of Y and Nd, as proxies for heavy and light REE, in the deposits. Our results show that REE are truly adsorbed as easily leachable 8- to 9-coordinated outer-sphere hydrated complexes, dominantly onto kaolinite. Hence, at the atomic level, the Malagasy clays are genuine mineralogical analogues to those currently exploited in China.Nature Publishing Group2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/179165Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1038/s41467-020-17801-5Nature Communications, 2020, vol. 11, num. 4386https://doi.org/10.1038/s41467-020-17801-5cc-by (c) Borst, Anouk M. et al., 2020https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1791652026-05-27T06:46:51Z
dc.title.none.fl_str_mv Adsorption of rare earth elements in regolith-hosted clay deposits
title Adsorption of rare earth elements in regolith-hosted clay deposits
spellingShingle Adsorption of rare earth elements in regolith-hosted clay deposits
Borst, Anouk M.
Espectroscòpia de raigs X
Minerals d'argila
Xina
X-ray spectroscopy
Clay minerals
China
title_short Adsorption of rare earth elements in regolith-hosted clay deposits
title_full Adsorption of rare earth elements in regolith-hosted clay deposits
title_fullStr Adsorption of rare earth elements in regolith-hosted clay deposits
title_full_unstemmed Adsorption of rare earth elements in regolith-hosted clay deposits
title_sort Adsorption of rare earth elements in regolith-hosted clay deposits
dc.creator.none.fl_str_mv Borst, Anouk M.
Smith, Martin P.
Finch, Adrian A.
Estrade, Guillaume
Villanova de Benavent, Cristina
Nason, Peter
Marquis, Eva
Horsburgh, Nicola J.
Goodenough, Kathryn M.
Xu, Cheng
Kynický, Jindř
Geraki, Kalotina
author Borst, Anouk M.
author_facet Borst, Anouk M.
Smith, Martin P.
Finch, Adrian A.
Estrade, Guillaume
Villanova de Benavent, Cristina
Nason, Peter
Marquis, Eva
Horsburgh, Nicola J.
Goodenough, Kathryn M.
Xu, Cheng
Kynický, Jindř
Geraki, Kalotina
author_role author
author2 Smith, Martin P.
Finch, Adrian A.
Estrade, Guillaume
Villanova de Benavent, Cristina
Nason, Peter
Marquis, Eva
Horsburgh, Nicola J.
Goodenough, Kathryn M.
Xu, Cheng
Kynický, Jindř
Geraki, Kalotina
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Espectroscòpia de raigs X
Minerals d'argila
Xina
X-ray spectroscopy
Clay minerals
China
topic Espectroscòpia de raigs X
Minerals d'argila
Xina
X-ray spectroscopy
Clay minerals
China
description Global resources of heavy Rare Earth Elements (REE) are dominantly sourced from Chinese regolith-hosted ion-adsorption deposits in which the REE are inferred to be weakly adsorbed onto clay minerals. Similar deposits elsewhere might provide alternative supply for these high-tech metals, but the adsorption mechanisms remain unclear and the adsorbed state of REE to clays has never been demonstrated in situ. This study compares the mineralogy and speciation of REE in economic weathering profiles from China to prospective regoliths developed on peralkaline rocks from Madagascar. We use synchrotron X-ray absorption spectroscopy to study the distribution and local bonding environment of Y and Nd, as proxies for heavy and light REE, in the deposits. Our results show that REE are truly adsorbed as easily leachable 8- to 9-coordinated outer-sphere hydrated complexes, dominantly onto kaolinite. Hence, at the atomic level, the Malagasy clays are genuine mineralogical analogues to those currently exploited in China.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/179165
url https://hdl.handle.net/2445/179165
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1038/s41467-020-17801-5
Nature Communications, 2020, vol. 11, num. 4386
https://doi.org/10.1038/s41467-020-17801-5
dc.rights.none.fl_str_mv cc-by (c) Borst, Anouk M. et al., 2020
https://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Borst, Anouk M. et al., 2020
https://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 Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
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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score 15.301603

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