Synthesis of Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) and kinetic and equilibrium studies of the uptake of Nd                         3+                          and Sr                         2+                          ions

Tomohito Kameda; Tetsu Shinmyou; Toshiaki Yoshioka

doi:10.1016/j.apsusc.2016.01.064

Synthesis of Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) and kinetic and equilibrium studies of the uptake of Nd ³⁺ and Sr ²⁺ ions

Tomohito Kameda, Tetsu Shinmyou, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

A Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) (AMP·Li-Al LDH) was synthesized by the drop-wise addition of an Al-containing solution to a Li-AMP solution at a constant pH of 8.0. The AMP·Li-Al LDH was found to take up Nd ³⁺ and Sr ²⁺ ions from aqueous solutions; this phenomenon was attributable to the metal-chelating functionality of the AMP ions in the interlayers of the AMP·Li-Al LDH. Further, the AMP·Li-Al LDH was found to take up Nd ³⁺ ions preferentially than Sr ²⁺ ions. This was attributable to the stability of the Nd-AMP complex being higher than that of the Sr-AMP complex. The mass-transfer-controlled shrinking-core model could describe the uptake behavior better than the surface-reaction-control model. The AMP ions in the AMP·Li-Al LDH interlayers rapidly formed chelate complexes with the Nd ³⁺ or Sr ²⁺ ions. As a result, the transfer of Nd ³⁺ and Sr ²⁺ ions through the product layer was the rate-limiting step. Furthermore, this reaction could be explained by a Langmuir-type adsorption mechanism, indicating that it involved chemical adsorption; this was consistent with the formation of chelate complexes between Nd ³⁺ and Sr ²⁺ ions and the AMP ions in the interlayers of the AMP·Li-Al LDH.

Original language	English
Pages (from-to)	523-528
Number of pages	6
Journal	Applied Surface Science
Volume	366
DOIs	https://doi.org/10.1016/j.apsusc.2016.01.064
Publication status	Published - 2016 Mar 15

Keywords

Amino tris(methylene phosphonic acid)
Equilibrium
Kinetic
Li-Al layered double hydroxide
Uptake

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2016.01.064

Cite this

Kameda, T., Shinmyou, T., & Yoshioka, T. (2016). Synthesis of Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) and kinetic and equilibrium studies of the uptake of Nd ³⁺ and Sr ²⁺ ions Applied Surface Science, 366, 523-528. https://doi.org/10.1016/j.apsusc.2016.01.064

Synthesis of Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) and kinetic and equilibrium studies of the uptake of Nd ³⁺ and Sr ²⁺ ions . / Kameda, Tomohito; Shinmyou, Tetsu; Yoshioka, Toshiaki.

In: Applied Surface Science, Vol. 366, 15.03.2016, p. 523-528.

Research output: Contribution to journal › Article › peer-review

Kameda, T, Shinmyou, T & Yoshioka, T 2016, ' Synthesis of Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) and kinetic and equilibrium studies of the uptake of Nd ³⁺ and Sr ²⁺ ions ', Applied Surface Science, vol. 366, pp. 523-528. https://doi.org/10.1016/j.apsusc.2016.01.064

Kameda T, Shinmyou T, Yoshioka T. Synthesis of Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) and kinetic and equilibrium studies of the uptake of Nd ³⁺ and Sr ²⁺ ions Applied Surface Science. 2016 Mar 15;366:523-528. doi: 10.1016/j.apsusc.2016.01.064

Kameda, Tomohito ; Shinmyou, Tetsu ; Yoshioka, Toshiaki. / Synthesis of Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) and kinetic and equilibrium studies of the uptake of Nd ³⁺ and Sr ²⁺ ions In: Applied Surface Science. 2016 ; Vol. 366. pp. 523-528.

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abstract = " A Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) (AMP·Li-Al LDH) was synthesized by the drop-wise addition of an Al-containing solution to a Li-AMP solution at a constant pH of 8.0. The AMP·Li-Al LDH was found to take up Nd 3+ and Sr 2+ ions from aqueous solutions; this phenomenon was attributable to the metal-chelating functionality of the AMP ions in the interlayers of the AMP·Li-Al LDH. Further, the AMP·Li-Al LDH was found to take up Nd 3+ ions preferentially than Sr 2+ ions. This was attributable to the stability of the Nd-AMP complex being higher than that of the Sr-AMP complex. The mass-transfer-controlled shrinking-core model could describe the uptake behavior better than the surface-reaction-control model. The AMP ions in the AMP·Li-Al LDH interlayers rapidly formed chelate complexes with the Nd 3+ or Sr 2+ ions. As a result, the transfer of Nd 3+ and Sr 2+ ions through the product layer was the rate-limiting step. Furthermore, this reaction could be explained by a Langmuir-type adsorption mechanism, indicating that it involved chemical adsorption; this was consistent with the formation of chelate complexes between Nd 3+ and Sr 2+ ions and the AMP ions in the interlayers of the AMP·Li-Al LDH. ",

keywords = "Amino tris(methylene phosphonic acid), Equilibrium, Kinetic, Li-Al layered double hydroxide, Uptake",

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AU - Yoshioka, Toshiaki

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AB - A Li-Al layered double hydroxide intercalated with amino tris(methylene phosphonic acid) (AMP·Li-Al LDH) was synthesized by the drop-wise addition of an Al-containing solution to a Li-AMP solution at a constant pH of 8.0. The AMP·Li-Al LDH was found to take up Nd 3+ and Sr 2+ ions from aqueous solutions; this phenomenon was attributable to the metal-chelating functionality of the AMP ions in the interlayers of the AMP·Li-Al LDH. Further, the AMP·Li-Al LDH was found to take up Nd 3+ ions preferentially than Sr 2+ ions. This was attributable to the stability of the Nd-AMP complex being higher than that of the Sr-AMP complex. The mass-transfer-controlled shrinking-core model could describe the uptake behavior better than the surface-reaction-control model. The AMP ions in the AMP·Li-Al LDH interlayers rapidly formed chelate complexes with the Nd 3+ or Sr 2+ ions. As a result, the transfer of Nd 3+ and Sr 2+ ions through the product layer was the rate-limiting step. Furthermore, this reaction could be explained by a Langmuir-type adsorption mechanism, indicating that it involved chemical adsorption; this was consistent with the formation of chelate complexes between Nd 3+ and Sr 2+ ions and the AMP ions in the interlayers of the AMP·Li-Al LDH.

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