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Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium

[Image: see text] Scandium (Sc) is a high value Critical Material that is most commonly used in advanced alloys. Due to current and potential supply limitations, there has been an international effort to find new and improved ways to extract Sc from existing and novel resources. Solid-phase extracti...

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Autores principales: Brewer, Aaron, Reicher, Chloé, Manatschal, Olivia, Bai, Hongzhi, Nakanishi, Kazuki, Kleitz, Freddy
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10598872/
https://www.ncbi.nlm.nih.gov/pubmed/37886037
http://dx.doi.org/10.1021/acssuschemeng.3c04672
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author Brewer, Aaron
Reicher, Chloé
Manatschal, Olivia
Bai, Hongzhi
Nakanishi, Kazuki
Kleitz, Freddy
author_facet Brewer, Aaron
Reicher, Chloé
Manatschal, Olivia
Bai, Hongzhi
Nakanishi, Kazuki
Kleitz, Freddy
author_sort Brewer, Aaron
collection PubMed
description [Image: see text] Scandium (Sc) is a high value Critical Material that is most commonly used in advanced alloys. Due to current and potential supply limitations, there has been an international effort to find new and improved ways to extract Sc from existing and novel resources. Solid-phase extraction (SPE) is one promising approach for Sc recovery, particularly for use with low-grade feedstocks. Here, unfunctionalized, powdered hierarchically porous silica monoliths from DPS Inc. (DPS) are used for Sc extraction in batch and semicontinuous flow systems at model conditions. The sorbent exhibits excellent mass transfer properties, much like the whole monoliths, which should permit Sc to be rapidly recovered from large volumes of feedstock. The Sc adsorption capacity of the material is ∼142.7 mg/g at pH 6, dropping to ∼12.0 mg/g at pH 3, and adsorption is furthermore highly selective for Sc compared with the other rare earth elements (REEs). Under semicontinuous flow conditions, recovery efficiency is limited by a kinetic process. The primary mechanism responsible for the system’s slow approach to equilibrium is the Sc adsorption reaction kinetics rather than inter- or intraparticle diffusion. Overall, this unmodified hierarchically porous silica powder from DPS shows great promise for the selective extraction of Sc from various feedstocks.
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spelling pubmed-105988722023-10-26 Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium Brewer, Aaron Reicher, Chloé Manatschal, Olivia Bai, Hongzhi Nakanishi, Kazuki Kleitz, Freddy ACS Sustain Chem Eng [Image: see text] Scandium (Sc) is a high value Critical Material that is most commonly used in advanced alloys. Due to current and potential supply limitations, there has been an international effort to find new and improved ways to extract Sc from existing and novel resources. Solid-phase extraction (SPE) is one promising approach for Sc recovery, particularly for use with low-grade feedstocks. Here, unfunctionalized, powdered hierarchically porous silica monoliths from DPS Inc. (DPS) are used for Sc extraction in batch and semicontinuous flow systems at model conditions. The sorbent exhibits excellent mass transfer properties, much like the whole monoliths, which should permit Sc to be rapidly recovered from large volumes of feedstock. The Sc adsorption capacity of the material is ∼142.7 mg/g at pH 6, dropping to ∼12.0 mg/g at pH 3, and adsorption is furthermore highly selective for Sc compared with the other rare earth elements (REEs). Under semicontinuous flow conditions, recovery efficiency is limited by a kinetic process. The primary mechanism responsible for the system’s slow approach to equilibrium is the Sc adsorption reaction kinetics rather than inter- or intraparticle diffusion. Overall, this unmodified hierarchically porous silica powder from DPS shows great promise for the selective extraction of Sc from various feedstocks. American Chemical Society 2023-10-11 /pmc/articles/PMC10598872/ /pubmed/37886037 http://dx.doi.org/10.1021/acssuschemeng.3c04672 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Brewer, Aaron
Reicher, Chloé
Manatschal, Olivia
Bai, Hongzhi
Nakanishi, Kazuki
Kleitz, Freddy
Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium
title Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium
title_full Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium
title_fullStr Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium
title_full_unstemmed Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium
title_short Powdered Hierarchically Porous Silica Monoliths for the Selective Extraction of Scandium
title_sort powdered hierarchically porous silica monoliths for the selective extraction of scandium
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10598872/
https://www.ncbi.nlm.nih.gov/pubmed/37886037
http://dx.doi.org/10.1021/acssuschemeng.3c04672
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