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Adsorption of rare earth elements in regolith-hosted clay deposits

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dc.contributor.authorBorst, Anouk Margaretha
dc.contributor.authorSmith, Martin P.
dc.contributor.authorFinch, Adrian A.
dc.contributor.authorEstrade, Guillaume
dc.contributor.authorVillanova-de-Benavent, Cristina
dc.contributor.authorNason, Peter
dc.contributor.authorMarquis, Eva
dc.contributor.authorHorsburgh, Nicola J.
dc.contributor.authorGoodenough, Kathryn M.
dc.contributor.authorXu, Cheng
dc.contributor.authorKynický, Jindřich
dc.contributor.authorGeraki, Kalotina
dc.date.accessioned2020-09-07T11:30:07Z
dc.date.available2020-09-07T11:30:07Z
dc.date.issued2020-09-01
dc.identifier.citationBorst , A M , Smith , M P , Finch , A A , Estrade , G , Villanova-de-Benavent , C , Nason , P , Marquis , E , Horsburgh , N J , Goodenough , K M , Xu , C , Kynický , J & Geraki , K 2020 , ' Adsorption of rare earth elements in regolith-hosted clay deposits ' , Nature Communications , vol. 11 , 4386 . https://doi.org/10.1038/s41467-020-17801-5en
dc.identifier.issn2041-1723
dc.identifier.otherPURE: 269100320
dc.identifier.otherPURE UUID: 41a90d72-6343-4f9f-80e5-eed56c1893ab
dc.identifier.otherORCID: /0000-0002-3689-1517/work/80257335
dc.identifier.otherORCID: /0000-0003-4553-9037/work/80257869
dc.identifier.otherORCID: /0000-0003-0775-1491/work/80257904
dc.identifier.otherScopus: 85090055421
dc.identifier.otherWOS: 000569891500013
dc.identifier.urihttps://hdl.handle.net/10023/20575
dc.descriptionFunding: UK NERC SOSRARE consortium, grant numbers NE/M010856/1 (to AMB, AAF and NJH), NE/M011267/1 (to MS, GE, PN, CVdB and EM) and NE/M01116X/1 (to KMG). JK was supported by The Czech Science Foundation GACR EXPRO (grant number 19-29124X). Diamond Light Source I18 beam time awards (grant numbers SP14793 and SP15903).en
dc.description.abstractGlobal 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.
dc.format.extent15
dc.language.isoeng
dc.relation.ispartofNature Communicationsen
dc.rightsCopyright © The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en
dc.subjectGE Environmental Sciencesen
dc.subjectQE Geologyen
dc.subjectDASen
dc.subjectBDCen
dc.subjectR2Cen
dc.subject.lccGEen
dc.subject.lccQEen
dc.titleAdsorption of rare earth elements in regolith-hosted clay depositsen
dc.typeJournal articleen
dc.contributor.sponsorNERCen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.identifier.doihttps://doi.org/10.1038/s41467-020-17801-5
dc.description.statusPeer revieweden
dc.identifier.grantnumberNE/M010856/1en


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