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A perspective on developing solid-phase extraction technologies for industrial-scale critical materials recovery.

Aaron Brewer¹, Justyna Florek¹, Freddy Kleitz¹

¹Department of Inorganic Chemistry - Functional Materials, Faculty of Chemistry, University of Vienna Währinger Strasse 42 1090 Vienna Austria aaronbrewer5@gmail.com freddy.kleitz@univie.ac.at.

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Summary

Critical materials (CMs) recovery is crucial for the economy. Solid-phase extraction (SPE) using advanced sorbents shows promise for diversifying supply, but needs further development for real-world application.

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Area of Science:

Materials Science
Chemical Engineering
Environmental Science

Background:

Critical materials (CMs) are vital for modern economies but face supply chain risks.
Diversifying CM sources necessitates advanced recovery and purification technologies.
Solid-phase extraction (SPE) offers a promising approach for selective CM recovery.

Purpose of the Study:

To highlight the potential of SPE for critical material recovery.
To discuss the advantages of advanced sorbents like hierarchically porous silica monoliths.
To identify areas for future development in SPE for CMs.

Main Methods:

Review of solid-phase extraction (SPE) principles and applications for CMs.
Discussion of sorbent materials, focusing on hierarchically porous silica monoliths.
Analysis of current advancements and limitations in SPE for CM recovery.

Main Results:

SPE enables preferential retention of specific CMs from aqueous solutions.
Hierarchically porous silica monoliths offer a high surface area, customizable platform for CM extraction.
Significant progress has been made in developing novel SPE sorbents for CMs.

Conclusions:

SPE technologies, particularly those using advanced sorbents, are key to diversifying critical material supply.
Future research should focus on scalability, real-world feedstock application, techno-economic analysis, and environmental impact studies for practical viability.