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Synthetic saponite clays as promising solids for lanthanide ion recovery

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Abstract

Extraction of lanthanide ions with different ionic radius (La3+, Gd3+ and Lu3+) from aqueous solutions was carried out by using two synthetic saponite clays. The clays, prepared through a simple and low-cost hydrothermal approach, showed different particle size and cation-exchange capacity (CEC) and were characterized in order to evaluate the influence of their physico-chemical properties on the uptake process. Metal uptake tests, performed in pure water and simulated freshwater and seawater solutions, demonstrated that synthetic saponites have a general good sorption capacity with high lanthanide capture after a few hours of contact. The solid samples showed a higher selectivity for Lu3+, due to its small ionic radius.

Graphical abstract: Synthetic saponite clays as promising solids for lanthanide ion recovery

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Article information


Submitted
02 Dec 2019
Accepted
14 Jan 2020
First published
14 Jan 2020

New J. Chem., 2020, Advance Article
Article type
Paper

Synthetic saponite clays as promising solids for lanthanide ion recovery

S. Marchesi, F. Carniato, M. Guidotti, M. Botta, L. Marchese and C. Bisio, New J. Chem., 2020, Advance Article , DOI: 10.1039/C9NJ05983K

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