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Adsorption mechanism of yttrium ions onto ion-adsorption type rare earths ore.
- Source :
-
Separation & Purification Technology . Oct2022, Vol. 299, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] • Ion-adsorption type rare earths desorption residues as adsorbents. • The maximum Y(III) adsorption capacity of 4.45 mg·g−1. • Y(III) adsorbed onto the adsorbents surface possibly via Sii-Oi-Y bond. • Adsorption process governed by chemical adsorption. Ion-adsorption type rare earths ore, as the primary source for middle-heavy rare earth elements, was extracted by various electrolytes via the adsorption–desorption effect. In this work, adsorption behavior and mechanism for yttrium ions onto ion-adsorption type rare earths ore as adsorbents were investigated systematically and comprehensively. The isotherms and kinetics suggested the adsorption of yttrium ions was consistent to Langmuir and pseudo-second-order model, revealing that the adsorption process was homogeneous and primarily governed by chemical adsorption. Maximum adsorption capacity could attain as 4.45 mg·g−1 in pH of 3 with 10 g·L−1 yttrium ions. Moreover, thermodynamics analysis indicated the adsorption process was spontaneous, and random. ATR-FTIR, XPS and DFT results indicated that Y(III) adsorbed onto ion-adsorption type rare earths ore surface possibly via Si-O-Y bond. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13835866
- Volume :
- 299
- Database :
- Academic Search Index
- Journal :
- Separation & Purification Technology
- Publication Type :
- Academic Journal
- Accession number :
- 158388103
- Full Text :
- https://doi.org/10.1016/j.seppur.2022.121641