Facile preparation of covalent organic frameworks@alginate composite beads for enhanced uranium(VI) adsorption

Covalent organic frameworks (COFs) have broad application prospects in adsorption and separation. Yet, as COFs are generally in powder form, their superior performance at the laboratory scale is difficult to transfer into pilot- or industrial-scale use. Thus, there is a strong and urgent need to str...

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Bibliographic Details
Published inRare metals Vol. 41; no. 4; pp. 1323 - 1331
Main Authors Duan, Pan, Lin, Duo-Yu, Yang, Wei-Ting, Huang, Xiao-Jing, Sun, A-Hui, Pan, Qin-He
Format Journal Article
LanguageEnglish
Published Beijing Nonferrous Metals Society of China 01.04.2022
Springer Nature B.V
Subjects
Adsorption
Alginates
Aqueous solutions
Beads
Biomaterials
Chemistry and Materials Science
Dubnium
Energy
Interference immunity
Materials Engineering
Materials Science
Metallic Materials
Monolithic materials
Monomers
Nanoscale Science and Technology
Original Article
Phenylenediamine
Physical Chemistry
Recyclability
Uranium
Wastewater treatment
Covalent organic frameworks
Alginate
Uranium
Composite beads
Adsorption
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Summary:Covalent organic frameworks (COFs) have broad application prospects in adsorption and separation. Yet, as COFs are generally in powder form, their superior performance at the laboratory scale is difficult to transfer into pilot- or industrial-scale use. Thus, there is a strong and urgent need to structure COFs into monolithic materials. Herein, a facile strategy was developed to prepare COFs@alginate composite beads. Three composite beads comprising different COFs including TpPa-1 (2,4,6-triformylphloroglucinol (Tp) and p-phenylenediamine (Pa-1) as monomers), TpDb (Tp and 2,5-diaminobenzonitrile (Db) as monomers) and TpTt (Tp and 1,3,5-triazine-2,4,6-triamine (Tt) as monomers) with controlled COF loading and product size have been facilely achieved via this strategy, validating the applicability of this method. Furthermore, the representative TpDb@alginate composite beads showed good adsorption performance of uranium(VI) in aqueous solution with high adsorption capacity (635 mg·g −1 ), good interference immunity and recyclability. This work offers a practical approach for incorporation of COFs into polymer matrix, which can serve as potential adsorbents for radioactive wastewater treatment. Graphical abstract
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ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-021-01884-0