Neodymium and Yttrium Adsorption on Citrate-Modified Cellulose: Experimental and Computational Insights
Alessio C. Perri, Giorgio De Luca, Nasser AL-Hamdani, Vincenzo Algieri, Emilia Furia, Elpida Piperopoulos, Giuseppina Anna Corrente, Amerigo Beneduci
TL;DR
This paper explores using citrate-modified cellulose to adsorb neodymium and yttrium, offering a sustainable alternative to traditional separation methods.
Contribution
The study introduces cellulose citrate as a novel adsorbent for rare earth elements with pH-dependent selectivity and validated mechanisms.
Findings
Cellulose citrate shows higher adsorption capacity for neodymium at higher concentrations.
Adsorption equilibrium is reached within 60 minutes and is strongly pH-dependent.
Computational models confirm the experimental adsorption behavior and binding mechanisms.
Abstract
Neodymium (Nd) and yttrium (Y), two rare earth elements, play a crucial role in a wide range of technologies, and their separation is a challenging process. Adsorption-based approaches offer a sustainable and cost-efficient substitute for the most widely used solvent extraction procedure. Here, we assess the potential of cellulose citrate (CC) as an adsorbent for the removal of Y and Nd through both experimental and computational approaches. CC was successfully synthesized by reacting raw cellulose extracted from Spartium junceum (Spanish broom) with molten citric acid using a green approach that does not require any solvent. The final goal is to shed light on the mechanism of adsorption by citrate-functionalized cellulose by interpreting the adsorption measurements through kinetics and isotherm adsorption models, as well as Density functional theory (DFT) calculations and molecular…
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Taxonomy
TopicsExtraction and Separation Processes · Adsorption and biosorption for pollutant removal · Geochemistry and Elemental Analysis