NDLI: Selective Adsorption Behavior and Mechanism for Cd(II) in Aqueous Solution with a Recoverable Magnetie-Surface Ion-Imprinted Polymer.

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Selective Adsorption Behavior and Mechanism for Cd(II) in Aqueous Solution with a Recoverable Magnetie-Surface Ion-Imprinted Polymer.

Content Provider	Europe PMC
Author	Ye, Siqing Zhang, Weiye Hu, Xingliang He, Hongxing Zhang, Yi Li, Weili Hu, Guangyuan Li, Yue Deng, Xiujun
Editor	Suteu, Daniela
Copyright Year	2023
Abstract	A novel recoverable magnetic Cd(II) ion-imprinted polymer was synthesized on the surface of silica-coated Fe3O4 particles via the surface imprinting technique and chemical grafting method. The resulting polymer was used as a highly efficient adsorbent for the removal of Cd(II) ions from aqueous solutions. The adsorption experiments revealed that Fe3O4@SiO2@IIP had a maximum adsorption capacity of up to 29.82 mg·g−1 for Cd(II) at an optimal pH of 6, with the adsorption equilibrium achieved within 20 min. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm adsorption model. Thermodynamic studies showed that the adsorption of Cd(II) on the imprinted polymer was spontaneous and entropy-increasing. Furthermore, the Fe3O4@SiO2@IIP could rapidly achieve solid–liquid separation in the presence of an external magnetic field. More importantly, despite the poor affinity of the functional groups constructed on the polymer surface for Cd(II), we improved the specific selectivity of the imprinted adsorbent for Cd(II) through surface imprinting technology. The selective adsorption mechanism was verified by XPS and DFT theoretical calculations.
Journal	Polymers
Volume Number	15
PubMed Central reference number	PMC10255807
Issue Number	11
PubMed reference number	37299215
e-ISSN	20734360
DOI	10.3390/polym15112416
Language	English
Publisher	MDPI
Publisher Date	2023-05-23
Access Restriction	Open
Rights License	Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2023 by the authors.
Subject Keyword	ion-imprinted polymer magnetic separation Cd(II) ion selective adsorption density functional theory
Content Type	Text
Resource Type	Article
Subject	Chemistry Polymers and Plastics

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