Projekte

Size-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials

Autor(en)
Yimu Hu, Luis C. Misal Castro, Elisabeth Drouin, Justyna Florek, Hanspeter Kaehlig, Dominic Lariviere, Freddy Kleitz, Frederic-Georges Fontaine
Abstrakt

The separation and preconcentration of rare earth elements (REEs) from mineral concentrates in an economically and environmentally sustainable manner are difficult tasks due to their similar physicochemical properties. Herein, a series of tetradentate phenylenedioxy diamide (PDDA) ligands were synthesized and grafted on large-pore three-dimensional KIT-6 mesoporous silica. In solid-phase extraction, the hybrid sorbents enable a size-selective separation of REEs on the basis of the bite angles of the ligands. In particular, smaller REE3+ ions are preferentially extracted by KIT-6-1,2-PDDA, whereas light REEs with larger ionic radius are favored by KIT-6-1,3-PDDA. The exposure of bauxite residue digestion solution containing REEs as well as a number of types of competitive ions (including Th and U) to the sorbents results in selective recovery of target REEs. The possibility of regenerating the mesoporous sorbents through a simple loading-stripping-regeneration process is demonstrated over up to five cycles with no significant loss in REE extraction capacity, suggesting adequate chemical and structural stability of the new sorbent materials.

Organisation(en)
Institut für Anorganische Chemie - funktionelle Materialien, Institut für Organische Chemie, NMR Zentrum
Externe Organisation(en)
Université Laval, Canada Res Chair Green Catalysis & Met Free Proc
Journal
ACS Applied Materials and Interfaces
Band
11
Seiten
23681-23691
Anzahl der Seiten
11
ISSN
1944-8244
DOI
https://doi.org/10.1021/acsami.9b04183
Publikationsdatum
07-2019
Peer-reviewed
Ja
ÖFOS 2012
Materialwissenschaften, Nanotechnologie
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/sizeselective-separation-of-rare-earth-elements-using-functionalized-mesoporous-silica-materials(66baece1-f147-48b4-8c31-7adc7f0b0310).html

Publikationen

Size-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials

Autor(en)
Yimu Hu, Luis C. Misal Castro, Elisabeth Drouin, Justyna Florek, Hanspeter Kaehlig, Dominic Lariviere, Freddy Kleitz, Frederic-Georges Fontaine
Abstrakt

The separation and preconcentration of rare earth elements (REEs) from mineral concentrates in an economically and environmentally sustainable manner are difficult tasks due to their similar physicochemical properties. Herein, a series of tetradentate phenylenedioxy diamide (PDDA) ligands were synthesized and grafted on large-pore three-dimensional KIT-6 mesoporous silica. In solid-phase extraction, the hybrid sorbents enable a size-selective separation of REEs on the basis of the bite angles of the ligands. In particular, smaller REE3+ ions are preferentially extracted by KIT-6-1,2-PDDA, whereas light REEs with larger ionic radius are favored by KIT-6-1,3-PDDA. The exposure of bauxite residue digestion solution containing REEs as well as a number of types of competitive ions (including Th and U) to the sorbents results in selective recovery of target REEs. The possibility of regenerating the mesoporous sorbents through a simple loading-stripping-regeneration process is demonstrated over up to five cycles with no significant loss in REE extraction capacity, suggesting adequate chemical and structural stability of the new sorbent materials.

Organisation(en)
Institut für Anorganische Chemie - funktionelle Materialien, Institut für Organische Chemie, NMR Zentrum
Externe Organisation(en)
Université Laval, Canada Res Chair Green Catalysis & Met Free Proc
Journal
ACS Applied Materials and Interfaces
Band
11
Seiten
23681-23691
Anzahl der Seiten
11
ISSN
1944-8244
DOI
https://doi.org/10.1021/acsami.9b04183
Publikationsdatum
07-2019
Peer-reviewed
Ja
ÖFOS 2012
Materialwissenschaften, Nanotechnologie
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/sizeselective-separation-of-rare-earth-elements-using-functionalized-mesoporous-silica-materials(66baece1-f147-48b4-8c31-7adc7f0b0310).html

Vortraege

Size-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials

Autor(en)
Yimu Hu, Luis C. Misal Castro, Elisabeth Drouin, Justyna Florek, Hanspeter Kaehlig, Dominic Lariviere, Freddy Kleitz, Frederic-Georges Fontaine
Abstrakt

The separation and preconcentration of rare earth elements (REEs) from mineral concentrates in an economically and environmentally sustainable manner are difficult tasks due to their similar physicochemical properties. Herein, a series of tetradentate phenylenedioxy diamide (PDDA) ligands were synthesized and grafted on large-pore three-dimensional KIT-6 mesoporous silica. In solid-phase extraction, the hybrid sorbents enable a size-selective separation of REEs on the basis of the bite angles of the ligands. In particular, smaller REE3+ ions are preferentially extracted by KIT-6-1,2-PDDA, whereas light REEs with larger ionic radius are favored by KIT-6-1,3-PDDA. The exposure of bauxite residue digestion solution containing REEs as well as a number of types of competitive ions (including Th and U) to the sorbents results in selective recovery of target REEs. The possibility of regenerating the mesoporous sorbents through a simple loading-stripping-regeneration process is demonstrated over up to five cycles with no significant loss in REE extraction capacity, suggesting adequate chemical and structural stability of the new sorbent materials.

Organisation(en)
Institut für Anorganische Chemie - funktionelle Materialien, Institut für Organische Chemie, NMR Zentrum
Externe Organisation(en)
Université Laval, Canada Res Chair Green Catalysis & Met Free Proc
Journal
ACS Applied Materials and Interfaces
Band
11
Seiten
23681-23691
Anzahl der Seiten
11
ISSN
1944-8244
DOI
https://doi.org/10.1021/acsami.9b04183
Publikationsdatum
07-2019
Peer-reviewed
Ja
ÖFOS 2012
Materialwissenschaften, Nanotechnologie
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/sizeselective-separation-of-rare-earth-elements-using-functionalized-mesoporous-silica-materials(66baece1-f147-48b4-8c31-7adc7f0b0310).html