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Adsorption Behaviors of Lanthanum Ions on Gibbsite
Minerals (Basel), 2023-12, Vol.13 (12)
[Peer Reviewed Journal]
COPYRIGHT 2023 MDPI AG ;ISSN: 2075-163X ;EISSN: 2075-163X ;DOI: 10.3390/min13121530
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Title:
Adsorption Behaviors of Lanthanum Ions on Gibbsite
Author:
Zhou, Zongke
;
Wan, Quan
;
Yu, Wenbin
;
Nie, Xin
;
Yang, Shuguang
;
Yang, Shuqin
;
Qin, Zonghua
Subjects:
Aluminum hydroxide
;
Bauxite
;
Clay minerals
;
Electrolytes
;
Lanthanum
Is Part Of:
Minerals (Basel), 2023-12, Vol.13 (12)
Description:
The enrichment process of rare earth elements in ion-adsorbed rare earth ores and bauxite is potentially related to the adsorption of rare earth elements by gibbsite. In this paper, lanthanum and yttrium were selected as surrogates of light rare earth elements and heavy rare earth elements, respectively. The effects of adsorption time, solution pH, and background electrolyte concentration on the adsorption of rare earth ions by gibbsite were investigated through batch adsorption experiments. The results showed that the adsorption of rare earth ions by gibbsite can approach equilibrium in 72 h. There is mainly electrostatic repulsion between gibbsite and rare earth ions at pH 4–7, and the adsorption efficiency increases with the increase in solution pH value and background electrolyte concentration. The adsorption process of rare earth ions by gibbsite is more consistent with the pseudo-second-order kinetic and Langmuir single-layer adsorption models. Moreover, based on the structural correlation between clay minerals and gibbsite, the causes for the differences in the adsorption behaviors of rare earth elements on the minerals are discussed. The results of this study help to understand the role of aluminum hydroxide in the migration and fate of rare earth elements in epigenetic environments.
Publisher:
MDPI AG
Language:
English
Identifier:
ISSN: 2075-163X
EISSN: 2075-163X
DOI: 10.3390/min13121530
Source:
ROAD
Alma/SFX Local Collection
ProQuest Central
DOAJ Directory of Open Access Journals
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