Rapid and selective uranium adsorption by glycine functionalized europium hydroxide

Alemtsehay Tesfay Reda; Dongxiang Zhang; Xin Lu

doi:10.1016/j.colsurfa.2018.08.039

Rapid and selective uranium adsorption by glycine functionalized europium hydroxide

Alemtsehay Tesfay Reda, Dongxiang Zhang^*, Xin Lu

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Beijing Institute of Technology

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

27 Citations (Scopus)

Abstract

A composite material of europium hydroxide (Eu(OH)₃) and glycine (Gly) is synthesized successfully to produce single phase material (Eu(OH)₃-Gly) which exhibits extremely selective capturing and high removal rate towards uranyl (UO₂ ²⁺) ion in an aqueous solution. Eu(OH)₃-Gly displayed distribution coefficient (K_d) of 3.23 × 10⁷ mL/g and removal rate of 100% to lower UO₂ ²⁺ ion concentration from 25 ppm to <1 ppb inside 15 min and these criteria place Eu(OH)₃-Gly among the top existing adsorbents for such adsorption. Adsorption kinetics for UO₂ ²⁺ follows pseudo-second-order model, proposing a chemisorption adsorption mechanism mainly via H₂N-U-NH₂ and O-U-O interactions. Eu(OH)₃-Gly showed good stability after the removal of uranyl ion as investigated by FT-IR and thermogravimetric analysis (TGA) methods. According to TG analysis, Eu(OH)₃-Gly showed less weight loss (23.7%) after adsorption compared with that of before adsorption (32%), suggesting that the attachment of uranium to the adsorbent contributed for the improvement of the thermal stability of Eu(OH)₃-Gly.

Original language	English
Pages (from-to)	299-308
Number of pages	10
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	556
DOIs	https://doi.org/10.1016/j.colsurfa.2018.08.039
Publication status	Published - 5 Nov 2018

Keywords

Adsorption
Europium hydroxide
Glycine
Selectivity
Uranium

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10.1016/j.colsurfa.2018.08.039

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title = "Rapid and selective uranium adsorption by glycine functionalized europium hydroxide",

abstract = "A composite material of europium hydroxide (Eu(OH)3) and glycine (Gly) is synthesized successfully to produce single phase material (Eu(OH)3-Gly) which exhibits extremely selective capturing and high removal rate towards uranyl (UO2 2+) ion in an aqueous solution. Eu(OH)3-Gly displayed distribution coefficient (Kd) of 3.23 × 107 mL/g and removal rate of 100% to lower UO2 2+ ion concentration from 25 ppm to <1 ppb inside 15 min and these criteria place Eu(OH)3-Gly among the top existing adsorbents for such adsorption. Adsorption kinetics for UO2 2+ follows pseudo-second-order model, proposing a chemisorption adsorption mechanism mainly via H2N-U-NH2 and O-U-O interactions. Eu(OH)3-Gly showed good stability after the removal of uranyl ion as investigated by FT-IR and thermogravimetric analysis (TGA) methods. According to TG analysis, Eu(OH)3-Gly showed less weight loss (23.7%) after adsorption compared with that of before adsorption (32%), suggesting that the attachment of uranium to the adsorbent contributed for the improvement of the thermal stability of Eu(OH)3-Gly.",

keywords = "Adsorption, Europium hydroxide, Glycine, Selectivity, Uranium",

author = "{Tesfay Reda}, Alemtsehay and Dongxiang Zhang and Xin Lu",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

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doi = "10.1016/j.colsurfa.2018.08.039",

language = "English",

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AU - Tesfay Reda, Alemtsehay

AU - Zhang, Dongxiang

AU - Lu, Xin

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Y1 - 2018/11/5

N2 - A composite material of europium hydroxide (Eu(OH)3) and glycine (Gly) is synthesized successfully to produce single phase material (Eu(OH)3-Gly) which exhibits extremely selective capturing and high removal rate towards uranyl (UO2 2+) ion in an aqueous solution. Eu(OH)3-Gly displayed distribution coefficient (Kd) of 3.23 × 107 mL/g and removal rate of 100% to lower UO2 2+ ion concentration from 25 ppm to <1 ppb inside 15 min and these criteria place Eu(OH)3-Gly among the top existing adsorbents for such adsorption. Adsorption kinetics for UO2 2+ follows pseudo-second-order model, proposing a chemisorption adsorption mechanism mainly via H2N-U-NH2 and O-U-O interactions. Eu(OH)3-Gly showed good stability after the removal of uranyl ion as investigated by FT-IR and thermogravimetric analysis (TGA) methods. According to TG analysis, Eu(OH)3-Gly showed less weight loss (23.7%) after adsorption compared with that of before adsorption (32%), suggesting that the attachment of uranium to the adsorbent contributed for the improvement of the thermal stability of Eu(OH)3-Gly.

AB - A composite material of europium hydroxide (Eu(OH)3) and glycine (Gly) is synthesized successfully to produce single phase material (Eu(OH)3-Gly) which exhibits extremely selective capturing and high removal rate towards uranyl (UO2 2+) ion in an aqueous solution. Eu(OH)3-Gly displayed distribution coefficient (Kd) of 3.23 × 107 mL/g and removal rate of 100% to lower UO2 2+ ion concentration from 25 ppm to <1 ppb inside 15 min and these criteria place Eu(OH)3-Gly among the top existing adsorbents for such adsorption. Adsorption kinetics for UO2 2+ follows pseudo-second-order model, proposing a chemisorption adsorption mechanism mainly via H2N-U-NH2 and O-U-O interactions. Eu(OH)3-Gly showed good stability after the removal of uranyl ion as investigated by FT-IR and thermogravimetric analysis (TGA) methods. According to TG analysis, Eu(OH)3-Gly showed less weight loss (23.7%) after adsorption compared with that of before adsorption (32%), suggesting that the attachment of uranium to the adsorbent contributed for the improvement of the thermal stability of Eu(OH)3-Gly.

KW - Adsorption

KW - Europium hydroxide

KW - Glycine

KW - Selectivity

KW - Uranium

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ER -

Rapid and selective uranium adsorption by glycine functionalized europium hydroxide

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