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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Published in | Journal of radioanalytical and nuclear chemistry Vol. 314; no. 1; pp. 415 - 427 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.10.2017
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0236-5731 1588-2780 |
DOI: | 10.1007/s10967-017-5387-7 |