LDH(Mg/Al:2)@montmorillonite nanocomposite as a novel anion-exchanger to adsorb uranyl ion from carbonate-containing solutions

A layered double hydroxide@montmorillonite nanocomposite (LDH@MMT) was synthesized by the coating of growing LDH layers onto the MMT surface through hydrothermal method and used to remove uranyl ion from carbonate-containing aqueous solutions. The adsorption kinetics was described using a pseudo-sec...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2017-10, Vol.314 (1), p.415-427
Main Authors: Seddighi, Hassan, Khodadadi Darban, Ahmad, Khanchi, Alireza, Fasihi, Javad, Koleini, Javad
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aluminum
Anion exchanging
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Hadrons
Heavy Ions
Hydroxides
Inorganic Chemistry
Magnesium
Mathematical models
Montmorillonite
Nanocomposites
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Sorption
Synthesis
Uranium
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Summary:A layered double hydroxide@montmorillonite nanocomposite (LDH@MMT) was synthesized by the coating of growing LDH layers onto the MMT surface through hydrothermal method and used to remove uranyl ion from carbonate-containing aqueous solutions. The adsorption kinetics was described using a pseudo-second-order model and the adsorption isotherms data was successfully explained by the Langmuir model. The adsorption capacity of MMT was considerably enhanced from 16 to more than 55 mg g −1 after coating of LDH at a wide range of pH (3–11). The synthesized hybrid adsorbent showed a higher affinity toward UO 2 (CO 3 ) 2 2− and UO 2 (CO 3 ) 3 4− species. These findings herein propose that LDH@MMT nanocomposite is a potential and proper adsorbent for the removal of U(VI) from natural and polluted waters.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-017-5387-7