Novel molecularly imprinted polymer prepared by palygorskite as support for selective adsorption of bisphenol A in aqueous solution

Zhao, Zhongwei; Fu, Dafang; Zhang, Binsheng

doi:10.1080/19443994.2015.1052989

Cited by 12 publications

(2 citation statements)

References 27 publications

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“…Molecularly imprinted polymers (MIPs) have commonly been investigated as selective BPA adsorbents. For example, photoresponsive MIPs based on mesoporous carriers, palygorskite-supported surface MIPs, and water-soluble MIPs showed excellent affinity and selectivity for BPA in aqueous solutions, but some MIPs required rather complicated synthesis processes [47][48][49].…”

Section: Selective Bisphenol a Adsorptionmentioning

confidence: 99%

The Selective Removal of Bisphenol A Using a Magnetic Adsorbent Fused with Bisphenol A-Binding Peptides

Xu,

Wu,

Bhargawa

et al. 2024

Materials

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The potential of bisphenol A (BPA)-binding peptides fused to magnetic beads is demonstrated as novel adsorbents that are reusable and highly selective for BPA removal from aqueous environments, in which various interfering substances coexist. Magnetic beads harboring peptides (peptide beads) showed a higher BPA removal capacity (8.6 mg/g) than that of bare beads without peptides (2.0 mg/g). The BPA adsorption capacity of peptide beads increased with the number of peptides fused onto the beads, where monomeric, dimeric, or trimeric repeats of a BPA-binding peptide were fused to magnetic beads. The BPA-adsorbing beads were regenerated using a methanol–acetic acid mixture, and after six regeneration cycles, the adsorption capacity remained above 87% of its initial capacity. The selective removal of BPA was confirmed in the presence of BPA analogs with high structural similarity (bisphenol F and bisphenol S) or in synthetic wastewater. The present work is a pioneering study that investigates the selective affinity of peptides to remove specific organics with high selectivity from complex environmental matrices.

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Section: Selective Bisphenol a Adsorptionmentioning

confidence: 99%

The Selective Removal of Bisphenol A Using a Magnetic Adsorbent Fused with Bisphenol A-Binding Peptides

Xu,

Wu,

Bhargawa

et al. 2024

Materials

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“…Three extraction techniques (liquid–liquid (LLE), solid-phase (SPE), and micro-solid-phase (SPME)) have been mostly preferred for the isolation and preconcentration of BPA . High-performance liquid chromatography (HPLC), gas chromatography/mass spectrometry (GC/MS), or electrochemical methods can be preferred for the analysis of extracts. − In the extraction process, adsorbent materials such as clay minerals, nanoparticles, carbon-based materials, and molecularly imprinted materials were used to preconcentrate and remove BPA from the aqueous solution. − Molecularly imprinted polymers (MIPs) have great potential as SPE sorbents due to the advantages of thermal and chemical stabilities, low cost, and ease of synthesis. − Chemical association or physical interaction of template with functional monomer, polymerization including initiator, porogen, crosslinker, and template removal are the main steps in the synthesis of MIPs. , The resulting MIP adsorbents with three-dimensional (3D) recognition sites for the template are used for the selective extraction of the template. MIPs can be synthesized in different forms such as nanoparticles, microparticles, in situ prepared monoliths, molecularly imprinted films, and membranes, considering the final approach. − Monolithic MIPs have been extensively chosen in SPE applications because of a simple, one-step, in situ polymerization process to use directly as an SPE cartridge without any necessity of grinding, sieving, and packing .…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermodynamic, Kinetic, and Isothermal Parameters for the Selective Adsorption of Bisphenol A

2022

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Herein, a novel imprinted solid-phase extraction cartridge was fabricated to investigate the kinetic, thermodynamic, and isothermal parameters for the selective adsorption of Bisphenol A (BPA). The imprinted polymeric cartridges (BMC) for the BPA adsorption were fabricated in the presence of a template and functional monomer using the in situ polymerization technique. To prove the efficiency and selectivity of BMC, the nonimprinted polymeric cartridges (BNC) and the empty polymeric cartridges (EC) were also fabricated with and without functional monomer using the same manner for the preparation of BMC. The characterization of cartridges was performed by elemental analysis, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area measurements, and swelling tests. BPA removal studies were performed by analyzing some parameters such as temperature, BPA concentration, flow rate, salt type, and concentration. The highest capacity was determined as 103.2 mg BPA/g polymer for a 0.75 mL/min flow rate of 0.75 M (NH 4 ) 2 SO 4 containing 200 mg/L BPA solution at 50 °C. NaOH (1.0 M) was used as a desorption agent. The reusability performance was examined by performing 10 consecutive cycles. The solid-phase extraction (SPE) performance was also checked to determine the enrichment and extraction recovery factors for tap water and synthetic wastewater samples. Temkin, Langmuir, Freundlich, and Dubinin–Radushkevich isotherm models were applied to BPA adsorption data examining the adsorption mechanism, surface properties, and adsorption degree. The most suitable isotherm model for BPA adsorption was determined as the Langmuir isotherm model. The thermodynamic parameters (Δ G °, Δ H °, and Δ S °) were investigated to reveal the thermodynamics of adsorption. Adsorption thermodynamic parameters (Δ H °, Δ S °, and Δ G °) were calculated using the thermodynamic equilibrium constant (thermodynamic equilibrium constant, K °) values that change with temperature. It was determined that BPA adsorption was spontaneous (Δ G ° < 0) and endothermic (Δ H ° > 0) and entropy increased (Δ S ° > 0) at the temperatures studied in the BPA adsorption process. The rate control step in the adsorption process was examined by applying pseudo-first-order and pseudo-second-order kinetic models to the adsorption data for the investigations of BPA adsorption kinetics, and the pseudo-second-order kinetic model was found to be more suitable for describing BPA adsorption kinetics. In examining the selectivity of cartridges, structural analogues of hydroquinone, phenol, β-estradiol, and 8-hydroxyquinoline were tested.

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Highly ordered molecularly imprinted mesoporous silica for selective removal of bisphenol A from wastewater

Tan

et al. 2019

J of Separation Science

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Selective removal of bisphenol A from wastewater is quite challenging primarily because of its low concentration and matrix complexity. To this end, according to the molecular structure of bisphenol A, we designed a functional monomer for the preparation of molecularly imprinted mesoporous silica using click chemistry reaction. The resultant bisphenol A imprinted mesoporous silica was characterized by transmission electron microscopy, small angle X‐ray diffraction, and N2 adsorption–desorption experiments. The results indicated that the bisphenol A imprinted mesoporous silica possessed a highly ordered periodic hexagonal mesostructure with the Brunauer–Emmett–Teller surface area of 944.28 m2/g. The bisphenol A imprinted mesoporous silica showed fast adsorption kinetics and the saturated adsorption capacity reached up to 88.6 mg/g at pH 6.5, and with relative selectivity factors ranged from 1.06 to 3.20. The adsorption efficiency of the bisphenol A imprinted mesoporous silica was above 97.96% after five extraction/elution cycles. The bisphenol A imprinted mesoporous silica was further applied to the selective removal of bisphenol A from real wastewater samples and showed great promise in practical applications.

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Novel molecularly imprinted polymer prepared by palygorskite as support for selective adsorption of bisphenol A in aqueous solution

Cited by 12 publications

References 27 publications

The Selective Removal of Bisphenol A Using a Magnetic Adsorbent Fused with Bisphenol A-Binding Peptides

The Selective Removal of Bisphenol A Using a Magnetic Adsorbent Fused with Bisphenol A-Binding Peptides

Investigation of Thermodynamic, Kinetic, and Isothermal Parameters for the Selective Adsorption of Bisphenol A

Highly ordered molecularly imprinted mesoporous silica for selective removal of bisphenol A from wastewater

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