Issue 18, 2024

Silica-based monoliths functionalized with DTPA for the removal of transition and lanthanide ions from aqueous solutions

Abstract

Transition and rare earth metals serve as indispensable raw materials across a broad spectrum of technological applications. However, their utilization is frequently linked to substantial waste production. Consequently, the recycling and recovery of these metals from end-of-life products or metal-contaminated aqueous environments hold significant importance within the framework of a circular economy. In our investigation, we employed synthetic mesoporous silica monoliths, synthesized via the sol–gel method and functionalized with chelating groups, for the efficient recovery of metal ions from aqueous matrices. The monoliths were characterized using a multi-technique approach and were tested in the recovery of paramagnetic Gd3+, Cu2+ and Co2+ ions from aqueous solutions, using 1H-NMR relaxometry to evaluate their uptake performance in real time and under simple conditions. Detailed information on the kinetics of the capture process was also highlighted. Finally, the possibility to regenerate the solid sorbents was evaluated.

Graphical abstract: Silica-based monoliths functionalized with DTPA for the removal of transition and lanthanide ions from aqueous solutions

Supplementary files

Article information

Article type
Paper
Submitted
08 feb 2024
Accepted
04 apr 2024
First published
08 apr 2024
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2024,53, 7801-7811

Silica-based monoliths functionalized with DTPA for the removal of transition and lanthanide ions from aqueous solutions

G. Ancora, S. Marchesi, M. Botta, L. Marchese, F. Carniato and C. Bisio, Dalton Trans., 2024, 53, 7801 DOI: 10.1039/D4DT00388H

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