Mesoporous molecularly imprinted polymer for removal of hormones from aqueous medium

Oliveira, Hanna Leijoto de; Pires, Bruna Carneiro; Teixeira, Leila Suleimara; Dinali, Laíse Aparecida Fonseca; Nascimento, Tienne Aparecida do; Borges, Keyller Bastos

doi:10.1016/j.colsurfa.2020.124506

Cited by 15 publications

(8 citation statements)

References 50 publications

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“…The minimum value of χ 2 (0.96) and the maximum R 2 (0.99) value close to 1 for the fipronil on the MIP indicated the best fitting of pseudo-first order (PFO). These results indicate that the fipronil molecules are adsorbed on the binding sites of MIP via a physisorption mechanism that involves a physical interaction like hydrogen bonding between the functional groups of the adsorbent and the template . The nonlinear and linear forms of the PFO models are described in eqs and , respectively.…”

Section: Resultsmentioning

confidence: 96%

“…These results indicate that the fipronil molecules are adsorbed on the binding sites of MIP via a physisorption mechanism that involves a physical interaction like hydrogen bonding between the functional groups of the adsorbent and the template. 35 The nonlinear and linear forms of the PFO models are described in eqs 7 and 8 , respectively. Similarly, eqs 9 and 10 relate to the nonlinear and linear PSO models, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Hayat

Manzoor

Raza³

et al. 2022

ACS Omega

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Fipronil, a phenyl pyrazole insecticide, is extensively used in agriculture to control insect infestation. It has the potential to assimilate into the food chain, leading to serious health concerns. We report molecularly imprinted polymer (MIP)-based dispersive solidphase microextraction for the targeted determination of fipronil in milk samples. Designing such a sorbent is of paramount importance for measuring the accurate amount of fipronil for monitoring its permissible limit. Response surface methodology based on a central composite design following a face-centered approach was used to optimize experimental conditions. The maximum binding capacity of 47 mg g −1 was achieved at optimal parameters of time (18 min), temperature (42 °C), pH (7), and analyte concentration (120 mg L −1 ). Under these conditions, a high percentage recovery of 94.6 ± 1.90% (n = 9) and a low limit of detection (LOD) and limit of quantitation (LOQ) (5.64 × 10 −6 and 1.71 × 10 −5 μg mL −1 , respectively) were obtained. The MIP was well characterized through a scanning electron microscope (SEM) as well as Brunauer−Emmett−Teller (BET), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) methods. Adsorption kinetics of the MIP followed the pseudo-first-order model (R 2 0.99 and χ 2 0.96), suggesting the MIP−analyte interaction to be a physiosorptive process, while adsorption isotherms followed the Freundlich model (R 2 0.99). The real sample analysis through high-performance liquid chromatography (HPLC) confirmed the selective determination of fipronil from milk samples.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Hayat

Manzoor

Raza³

et al. 2022

ACS Omega

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“…In addition, the E1 adsorption by few-layered boron nitride nanosheets 103 and E1 and E3 adsorption onto a mesoporous molecularly imprinted polymer 91 presented thermodynamic characteristics in parallel to that of. 100 The authors 91,100,102,103 reported that in physisorption, where the adsorption is caused because of the electrostatic interactions, the DG°is around −20 kJ mol −1 , while in chemisorption, the DG °ranges from −84 to −40 kJ mol −1 and adsorption occurs because of e − transfer, e − exchange or e − sharing. 100,102 further accentuated that owing to the hydrophobic prole of SE, during the sorption operation, there is an imbalance between the surface of the adsorbent and its internal forces, fostering the operation to molecular adsorption by the van der Walls force among many other interactions reported in Table 1.…”

Section: Adsorption Technique For the Removal Of Ses In Watermentioning

confidence: 99%

“…Investigators 100,102 also underscore that the E3 adjacent OH groups perhaps thwart the interaction with biomass compared to E1 and E2 . However, Elias et al 102 differ by reporting that both LI and FI suit the experimental data of E1 and E2 adsorbed by nutshell AC, and this event was attributed to the complex mechanism. In addition, the E1 adsorption by few-layered boron nitride nanosheets 103 and E1 and E3 adsorption onto a mesoporous molecularly imprinted polymer 91 presented thermodynamic characteristics in parallel to that of. 100 The authors 91,100,102,103 reported that in physisorption, where the adsorption is caused because of the electrostatic interactions, the Δ G ° is around −20 kJ mol −1 , while in chemisorption, the Δ G ° ranges from −84 to −40 kJ mol −1 and adsorption occurs because of e − transfer, e − exchange or e − sharing.…”

Section: Adsorption Technique For the Removal Of Ses In Watermentioning

confidence: 99%

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Sequestration of steroidal estrogen in aqueous samples using an adsorption mechanism: a systemic scientometric review

et al. 2023

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Molecularly Imprinted Polymers for Selective Sorption of Tricyclazole in Food

2022

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Molecularly imprinted polymers (MIPs) for selective recognition and separation of tricyclazole have been synthesized by precipitation polymerization technique, using three different functional monomers viz. methacrylic acid (acidic), 4-vinyl pyridine (basic) and methyl acrylate (neutral). MIP synthesized using tricyclazole as template, methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross-linker, 2,2'azobisisobutyronitrile as initiator and methanol:acetonitrile (1 : 1, v/v) as porogen gave the highest binding efficiency of 93.78 %. Sorption kinetics followed second pseudo order model (R 2 = 0.999) and the data fitted better to Freundlich isotherm (R 2 = 0.991). High values of selectivity factors α (19. 43-24.90) and β (23.88-35.03) indicate selectivity of MIPs over nonimprinted polymers (NIPs) toward tricyclazole in presence of other structural analogues. The MIPs were successfully applied for separating tricyclazole from fortified samples of rice and water, with recovery percentage of 91.64 % and 88.04 %, respectively. These MIPs with high selectivity and reusability can be employed routinely in sample preparation for tricyclazole residue analysis.

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Mesoporous molecularly imprinted polymer for removal of hormones from aqueous medium

Cited by 15 publications

References 50 publications

Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Sequestration of steroidal estrogen in aqueous samples using an adsorption mechanism: a systemic scientometric review

Molecularly Imprinted Polymers for Selective Sorption of Tricyclazole in Food

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