Effective and selective adsorption of uranyl ions by porous polyethylenimine-functionalized carboxylated chitosan/oxidized activated charcoal composite

Shen, Juan; Cao, Fei; Liu, Siqi; Wang, Congjun; Chen, Rigui; Chen, Ke

doi:10.1007/s11705-021-2054-x

Cited by 14 publications

(1 citation statement)

References 39 publications

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“…Under the strong electrostatic action between the polymer chains of carboxymethyl chitosan and CMC, a crosslinking reaction takes place to form the gel structure, and tannic acid makes the internal structure more uniform. [ 30–32 ] Once charged with electricity, stimulated by the external electric field, the +NH 3 at the end of carboxymethyl chitosan moves directionally and accumulates to the negative electrode, while the polyanions (COO − ) cannot move because they are connected to the skeleton of polymer chain. Hence, under the applied DC electric field, the interface of the negative electrode will expand with the enrichment of cations, and the sample will bend to the positive electrode of the external power supply under the superposition of electrostatic repulsion between ion migration.…”

Section: Results and Analysismentioning

confidence: 99%

A bio‐gel electric actuator prepared from tannic acid and carboxymethyl cellulose by green cross‐linking process with good output performance

Jia

Fang

et al. 2023

Polymer Engineering & Sci

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In this article, a chitosan‐based bio‐gel electric actuator with tannic acid and carboxymethyl cellulose (CMC)as cross‐linked materials was fabricated. By evaluating the output force and electrochemical characteristics of the electric actuator under different doping amounts of tannic acid and CMC, it was found that the sample with appropriate amount of cross‐linking can improve its output force, service life, specific capacitance. Infrared spectroscopy, scanning electron microscopy(SEM), and ion channel test showed that tannic acid and CMC were uniformly distributed in the chitosan matrix. The proper crosslinking was beneficial to transform the internal dense and uniform structure into a loose and porous structure, promote the migration of ions, improve the electrochemical performance of the electric actuator, and thereby improve its output performance. This study provided a facile and eco‐friendly method to construct chitosan‐based electromotive membrane with enhanced output properties.

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Section: Results and Analysismentioning

confidence: 99%

A bio‐gel electric actuator prepared from tannic acid and carboxymethyl cellulose by green cross‐linking process with good output performance

Jia

Fang

et al. 2023

Polymer Engineering & Sci

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Preparation of amine or carboxyl groups modified cellulose beads for removal of uranium (VI) ions from aqueous solutions

Bayramoglu,

Tilki,

Arica

2024

Cellulose

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In the present study, cellulose beads were prepared using the phase inversion method and then activated with epichlorohydrin. The epoxy groups of the activated beads were modified with Nα,Nα-bis(carboxymethyl)-L-lysine hydrate (CML), and tetraethylenepentamine (TEPA) ligands. These modified beads, coded as cellulose-COOH and cellulose-NH2, respectively, were used to remove of uranium (VI) ions from aqueous medium. The prepared adsorbents were characterized using FTIR, SEM, zeta-potential, and analytical methods; the performance of both the modified beads for the removal of uranium (VI) ions was optimized using different operational parameters in a batch system. The amount of adsorbed uranium ions on cellulose-COOH and cellulose-NH2 beads was 462.9 ± 13.7 and 127.4 ± 5.1 mg/g, respectively. The results are acceptable regarding the equilibrium kinetics for the adsorption of uranium (VI) ions, which followed the second-order kinetic model. The prepared activated cellulose beads could be utilized in many technological applications by making appropriate modifications in the reactive epoxy groups of cellulose.

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Purification of uranium-containing wastewater by adsorption: a review of research on resin materials

Liu

Huang

2022

J Radioanal Nucl Chem

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Effective and selective adsorption of uranyl ions by porous polyethylenimine-functionalized carboxylated chitosan/oxidized activated charcoal composite

Cited by 14 publications

References 39 publications

A bio‐gel electric actuator prepared from tannic acid and carboxymethyl cellulose by green cross‐linking process with good output performance

A bio‐gel electric actuator prepared from tannic acid and carboxymethyl cellulose by green cross‐linking process with good output performance

Preparation of amine or carboxyl groups modified cellulose beads for removal of uranium (VI) ions from aqueous solutions

Purification of uranium-containing wastewater by adsorption: a review of research on resin materials

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