scholarly journals Removal of bisphenol A from aqueous media using a highly selective adsorbent of hybridization cyclodextrin with magnetic molecularly imprinted polymer

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
S. Mamman ◽  
F. B. M. Suah ◽  
M. Raaov ◽  
F. S. Mehamod ◽  
S. Asman ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Molecularly Imprinted Polymer ◽  
Binding Capacity ◽  
Bulk Polymerization ◽  
Resonance Spectroscopy ◽  
Template Molecule ◽  
Order Kinetic ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Magnetic Molecularly Imprinted Polymer

In this study, a unique magnetic molecularly imprinted polymer (MMIP) adsorbent towards bisphenol A (BPA) as a template molecule was developed by bulk polymerization using β-cyclodextrin (β-CD) as a co-monomer with methacrylic acid (MAA) to form MMIP MAA–βCD as a new adsorbent. β-CD was hybridized with MAA to obtain water-compactible imprinting sites for the effective removal of BPA from aqueous samples. Benzoyl peroxide and trimethylolpropane trimethacrylate were used as the initiator and cross-linker, respectively. The adsorbents were characterized by Fourier transform infrared spectroscopy, scanning electronic microscopy, transmission electron microscopy, vibrating sample magnetometer, Brunauer–Emmett–Teller and X-ray diffraction. 1 H nuclear magnetic resonance spectroscopy was used to characterize the MAA–βCD and BPA–MAA–βCD complex. Several parameters influencing the adsorption efficiency of BPA such as adsorbent dosage, pH of sample solution, contact time, initial concentrations and temperature as well as selectivity and reusability study have been evaluated. MMIP MAA–βCD showed significantly higher removal efficiency and selective binding capacity towards BPA compared to MMIP MAA owing to its unique morphology with the presence of β-CD. The kinetics data can be well described by the pseudo second-order kinetic and Freundlich isotherm and Halsey models best fitted the isotherm data. The thermodynamic studies indicated that the adsorption reaction was a spontaneous and exothermic process. Therefore, MMIP based on the hybrid monomer of MAA–βCD shows good potential of a new monomer in molecularly imprinted polymer preparation and can be used as an effective adsorbent for the removal of BPA from aqueous solutions.

scholarly journals Application of molecularly imprinted polymer designed for the selective extraction of ketoprofen from wastewater

Water SA ◽  
2018 ◽  
Vol 44 (3 July) ◽  
Author(s):  
Lawrence Mzukisi Madikizela ◽  
Silindile Senamile Zunngu ◽  
Nomchenge Yamkelani Mlunguza ◽  
Nikita Tawanda Tavengwa ◽  
Phumlane Selby Mdluli ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Selective Extraction ◽  
Bulk Polymerization ◽  
Selectivity Coefficient ◽  
Dynamics Simulation ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Functional Monomer ◽  
Imprinted Polymer ◽  
Molecularly Imprinted

A molecularly imprinted polymer (MIP) that is selective to ketoprofen was synthesized and applied in the adsorption of the target compound from water. The MIP was synthesized using a bulk polymerization method at high temperatures (60–80°C), where ketoprofen, 2-vinylpyridine, ethylene glycol dimethacrylate, toluene and 1,1´-azobis(cyclohexanecarbonitrile) were used as template, functional monomer, cross-linker, porogen and initiator, respectively. Non-imprinted polymer (NIP) was synthesized similarly to the MIP but in the absence of ketoprofen. From molecular dynamics simulation, the nature of interactions that occurred between the template and the functional monomer were found to be based on hydrogen bonding. This was confirmed experimentally, where a high extraction efficiency of ≥ 90% was obtained at acidic conditions (pH 5) due to the protonation of ketoprofen. A contact time of 45 min was sufficient for the maximum adsorption of ketoprofen from 10 mL spiked water using 8 mg of the adsorbent. MIP showed greater selectivity than NIP by achieving a relative selectivity coefficient of 7.7 towards ketoprofen in the presence of structurally related pharmaceuticals. Furthermore, the order of sorption onto the MIPs from water was ketoprofen > fenoprofen > gemfibrozil. From a modelling perspective, the Langmuir adsorption isotherm and pseudo-second-order kinetic model gave the best fit, with maximum adsorption capacity of 8.24 mg·g−1 and sorption rate constant of 0.25 mg·g−1·min−1 for MIP. This was translated to chemisorption of ketoprofen onto the homogeneous MIP binding sites. This work demonstrated the great potential of MIP in selective recognition of ketoprofen from wastewater relative to closely related compounds.

Preparation of Nanosized Molecularly Imprinted Polymer Spheres for Atrazine

2012 ◽  
Vol 463-464 ◽  
pp. 1473-1478
Author(s):  
Rong Xie ◽  
Wen Jun Gui ◽  
Guo Nian Zhu
Keyword(s):  
Surface Area ◽  
Molecularly Imprinted Polymer ◽  
Binding Capacity ◽  
Bulk Polymerization ◽  
Precipitation Polymerization ◽  
Cross Linking ◽  
Functional Monomer ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Polymer Spheres

A novel nanosized molecularly imprinted polymer spheres for atrazine was synthesized in present assay, as an alternative to the biological antibodies. Both precipitation polymerization and bulk polymerization were performed. Various combinations of template, functional monomer, and cross-linking monomer and porogenic diluents were carried out to optimize the best one. The nanosized MIPs exhibit larger surface area and better binding capacity than traditional polymers, the best binding capacity and imprinted factor for atrazine were 95.75% and 1.83 respectively.

An effective approach for the laboratory measurement and detection of creatinine by magnetic molecularly imprinted polymer nanoparticles

2017 ◽  
Vol 41 (6) ◽  
pp. 2277-2286 ◽  
Author(s):  
Marjan Hassanzadeh ◽  
Mousa Ghaemy
Keyword(s):  
Molecularly Imprinted Polymer ◽  
High Selectivity ◽  
Binding Capacity ◽  
Polymer Nanoparticles ◽  
Laboratory Measurement ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Magnetic Molecularly Imprinted Polymer

A magnetic MIP that exhibits high selectivity to capture creatinine with a binding capacity of 33.32 mg g−1was successfully synthesized.

scholarly journals Examination of the Chemical Composition of Propolis IX. Solid Phase Extraction of Coumarins from Propolis by Using Molecularly Imprinted Polymer

2013 ◽  
Vol 12 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Katarína Hroboňová ◽  
Jozef Lehotay ◽  
Jozef Čižmárik
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Hplc Analysis ◽  
Chromatographic Method ◽  
Solid Phase ◽  
Binding Capacity ◽  
Bulk Polymerization ◽  
Template Molecule ◽  
Synthetic Method ◽  
Imprinted Polymer ◽  
Molecularly Imprinted

Abstract The group selective molecularly imprinted polymers (MIPs) for coumarins, including umbelliferone, herniarin, 4-methylumbelliferone, scoparone were developed. Using umbelliferone as the template molecule, methacrylic acid as functional monomer, ethylene glycol dimethacrylate as linking agent, chloroform as porogen and bulk polymerization as synthetic method, the MIPs were synthesized and characterized with rebinding experiments. The characteristics of MIPs were evaluated by chromatographic method and frontal analysis, and demonstrating good selectivity and high binding capacity (269 μg of umbelliferone per 100 mg of polymer). The group selective MIP was used as sorbent for the SPE pretreatment of coumarins from propolis extracts prior to HPLC analysis. Analysis of the samples showed good recoveries (>70 %). The limits of quantitation (LOQs) for studied compounds were 0.3-10 ng.mL-1 (determined for fluorescence detection).

Molecularly Imprinted Polymer Microspheres Prepared by Precipitation Polymerization for Atenolol Recognition

2010 ◽  
Vol 148-149 ◽  
pp. 1192-1198 ◽  
Author(s):  
Jin Yang Yu ◽  
Xiao Ling Hu ◽  
Ren Yuan Song ◽  
Shan Xi
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Binding Sites ◽  
Binding Capacity ◽  
Precipitation Polymerization ◽  
Acetonitrile Solution ◽  
Template Molecule ◽  
Affinity Binding ◽  
Polymer Microspheres ◽  
Imprinted Polymer ◽  
Molecularly Imprinted

Molecularly imprinted polymer microspheres for selective binding and recognition of atenolol were prepared by means of precipitation polymerization method using methacylic acid as functional monomer and trimethylolpropane trimethacrylate as cross-linker in the presence of atenolol as template molecule in acetonitrile solution. Computer simulation was employed to demonstrate the mechanism of the interaction between methacylic acid and atenolol. The scanning electron microscopy exhibited that the polymers were uniform spheres with the diameter of about 0.6µm. The adsorption properties of atenolol for imprinted microspheres were evaluated by equilibrium rebinding experiments. Scatchard plot analysis revealed that there were two classes of binding sites in the imprinted microspheres. The dissociation constant and the apparent maximum binding capacity were 4.56×10-4mol/L and 186.46μmol/g for the high affinity binding sites, 2.40×10-2mol/L and 4.01mmol/g for the low affinity binding sites. Compared to the structrally analogues, the imprinted microspheres exhibited a high selective reconizable capacity towards the template.

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