Synthesis of cadmium(ii) ion-imprinted composite membrane with a pyridine functional monomer and characterization of its adsorption performance

Cd( ) ion was used as template ion, and '-pyridine-2,6-di(2-methacrylamide) was used as the functional monomer. The experimental conditions for the synthesis of Cd( ) ion-imprinted composite membranes (Cd( )-IICMs) were optimized by the surface-imprinting method, and 25 Cd( )-IICM and their cor...

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Bibliographic Details
Published in:e-Polymers 2023-08, Vol.23 (1), p.1113-39
Main Authors: Hong, Yuwen, Wang, Xin, Fu, Dongxue, Wang, Guifang, Zhao, Li, Cheng, Huiling
Format: Article
Language:English
Subjects:
Adsorption
cd(ii)
Chemical synthesis
Contact angle
ion-imprinted composite membrane
Mass transfer
Materials science
Membranes
Methacrylamide
Monomers
Permeation
permeation selectivity
Polymers
pyridine functional monomer
Pyridines
surface-imprinting
Thermogravimetric analysis
Wastewater
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Summary:Cd( ) ion was used as template ion, and '-pyridine-2,6-di(2-methacrylamide) was used as the functional monomer. The experimental conditions for the synthesis of Cd( ) ion-imprinted composite membranes (Cd( )-IICMs) were optimized by the surface-imprinting method, and 25 Cd( )-IICM and their corresponding non-imprinted composite membranes (NICM ) were prepared. Then, the structures of the optimal membranes Cd( )-IICM and NICM were characterized by scanning electron microscopy, Brunner–Emmett–Teller, thermogravimetric analysis, contact angle analysis, and the effects of different adsorption conditions were studied. The adsorption behavior was analyzed by isothermal adsorption models and kinetic models. The permeation selectivity of Cd( )-IICM towards Cd( ) ions was studied. Results of the experiment indicate that Cd( )-IICM had excellent adsorption properties for Cd( ) ions with an imprinting factor of 2.15. The adsorption of Cd( ) ions in solution by Cd( )-IICM and NICM was in accordance with the Freundlich isothermal adsorption model and the pseudo-second-order kinetic model. In addition, in the presence of the competing ions Co( ), Ni( ), and Cu( ), Cd( )-IICM showed good permeation selectivity for Cd( ) ions, and the permeation process followed a facilitated permeation mass-transfer mechanism. In summary, the Cd( )-IICM prepared in this study has good application prospects for the separation and removal of Cd( ) ions from wastewater.
ISSN:1618-7229
2197-4586
1618-7229
DOI:10.1515/epoly-2022-8103