Magnetic solid-phase extraction of pyrethroid and neonicotinoid insecticides separately in environmental water samples based on alkaline or acidic group-functionalized mesoporous silica

Han, Rui; Wang, Fei; Zhao, Chuanfeng; Zhang, Meixing; Shen, Chen; Yang, Jing

doi:10.1039/d2an00088a

Cited by 8 publications

(2 citation statements)

References 62 publications

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“…Thus, when pH < 4.89, the surface of Fe 3 O 4 @La(OH) 3 particles became positively charged; the phosphate anions are favorable adsorbed because of the electrostatic attraction. Meanwhile, as the pH > 4.89, Fe 3 O 4 @La(OH) 3 is negatively charged; electrostatic repulsion leads to the decrease of phosphate adsorption capacity; and the phosphate removal decreased with the increase of pH [ 38 , 39 ]. For all that, a high phosphate removal rate (>95.7%) is maintained in the pH = 3–7 range.…”

Section: Resultsmentioning

confidence: 99%

Controllable Preparation of Superparamagnetic Fe3O4@La(OH)3 Inorganic Polymer for Rapid Adsorption and Separation of Phosphate

Jin

Li³

et al. 2023

Polymers

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Superparamagnetic Fe3O4 particles have been synthesized by solvothermal method, and a layer of dense silica sol polymer is coated on the surface prepared by sol-gel technique; then La(OH)3 covered the surface of silica sol polymer in an irregular shape by controlled in situ growth technology. These magnetic materials are characterized by TEM, FT-IR, XRD, SEM, EDS and VSM; the results show that La(OH)3 nanoparticles have successfully modified on Fe3O4 surface. The prepared Fe3O4@La(OH)3 inorganic polymer has been used as adsorbent to remove phosphate efficiently. The effects of solution pH, adsorbent dosage and co-existing ions on phosphate removal are investigated. Moreover, the adsorption kinetic equation and isothermal model are used to describe the adsorption performance of Fe3O4@La(OH)3. It was observed that Fe3O4@La(OH)3 exhibits a fast equilibrium time of 20 min, high phosphate removal rate (>95.7%), high sorption capacity of 63.72 mgP/g, excellent selectivity for phosphate in the presence of competing ions, under the conditions of phosphate concentration 30 mgP/L, pH = 7, adsorbent dose 0.6 g/L and room temperature. The phosphate adsorption process by Fe3O4@La(OH)3 is best described by the pseudo-second-order equation and Langmuir isotherm model. Furthermore, the real samples and reusability experiment indicate that Fe3O4@La(OH)3 could be regenerated after desorption, and 92.78% phosphate removing remained after five cycles. Therefore, La(OH)3 nanoparticles deposited on the surface of monodisperse Fe3O4 microspheres have been synthesized for the first time by a controlled in-situ growth method. Experiments have proved that Fe3O4@La(OH)3 particles with fast separability, large adsorption capacity and easy reusability can be used as a promising material in the treatment of phosphate wastewater or organic pollutants containing phosphoric acid functional group.

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Section: Resultsmentioning

confidence: 99%

Controllable Preparation of Superparamagnetic Fe3O4@La(OH)3 Inorganic Polymer for Rapid Adsorption and Separation of Phosphate

Jin

Li³

et al. 2023

Polymers

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“…The reason for this result may be that the log K ow of four pyrethroids was in the range of 5.7-8.2 (Table S1). The high hydrophobicity indicates that there is a strong hydrophobic interaction between UiO-66 and pyrethroids and can be eluted better with weakly polar acetonitrile (Han, Wang, et al, 2022). As a consequence, acetonitrile was used in the following extraction procedure.…”

Section: Effect Of Elution Solventmentioning

confidence: 99%

Determination of pyrethroids in water samples by dispersive solid‐phase extraction coupled with high‐performance liquid chromatography

Zhang

Wang

et al. 2022

Water Environment Research

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A metal–organic framework UiO‐66 was prepared and used as a sorbent for dispersive solid‐phase extraction combined with high‐performance liquid chromatography (DSPE‐HPLC) for extracting and determining four pyrethroids in water samples for the first time. The as‐synthesized material was confirmed by Fourier transform infrared spectroscopy (FT‐IR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), and N2 adsorption–desorption analysis. In addition, several important parameters affecting DSPE efficiency, including sorbent dosage, extraction time, salt concentration, pH, elution solvent, elution volume, and elution time, were optimized. Under the optimum conditions, the UiO‐66 based on the DSPE‐HPLC method displayed a wide linear range (10–1000 ng/ml), low limits of detection (2.8–3.5 ng/ml), and good precision (relative standard deviations [RSDs] < 3%) for the four pyrethroids. The recoveries at different spiked levels ranged from 89.3% to 107.7%. In addition, UiO‐66 featured good reusability and reproducibility. The results demonstrated that π–π stacking interactions, hydrophobic interactions, and van der Waals forces between UiO‐66 and the four pyrethroids played a crucial role in the adsorption process. Meanwhile, the maximum extraction capability could be obtained within 5 min. Thus, the DSPE coupled with the UiO‐66 sorbent can be successfully used in the analysis of four pyrethroids in environmental water samples. Practitioner Points Simultaneous determination of four pyrethroids using the developed UiO‐66‐based DSPE‐HPLC method in water samples. The developed method had a short enrichment time, broad linear ranges, a low detection limit, and high enrichment factor. It is showed that π–π stacking interaction, hydrophobic interaction, and van der Waals forces were the main mechanism.

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A review of the modern principles and applications of solid-phase extraction techniques in chromatographic analysis

et al. 2022

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Analytical processes involving sample preparation, separation, and quantifying analytes in complex mixtures are indispensable in modern-day analysis. Each step is crucial to enriching correct and informative results. Therefore, sample preparation is the critical factor that determines both the accuracy and the time consumption of a sample analysis process. Recently, several promising sample preparation approaches have been made available with environmentally friendly technologies with high performance. As a result of its many advantages, solid-phase extraction (SPE) is practiced in many different fields in addition to the traditional methods. The SPE is an alternative method to liquid–liquid extraction (LLE), which eliminates several disadvantages, including many organic solvents, a lengthy operation time and numerous steps, potential sources of error, and high costs. SPE advanced sorbent technology reorients with various functions depending on the structure of extraction sorbents, including reversed-phase, normal-phase, cation exchange, anion exchange, and mixed-mode. In addition, the commercial SPE systems are disposable. Still, with the continual developments, the restricted access materials (RAM) and molecular imprinted polymers (MIP) are fabricated to be active reusable extraction cartridges. This review will discuss all the theoretical and practical principles of the SPE techniques, focusing on packing materials, different forms, and performing factors in recent and future advances. The information about novel methodological and instrumental solutions in relation to different variants of SPE techniques, solid-phase microextraction (SPME), in-tube solid-phase microextraction (IT-SPME), and magnetic solid-phase extraction (MSPE) is presented. The integration of SPE with analytical chromatographic techniques such as LC and GC is also indicated. Furthermore, the applications of these techniques are discussed in detail along with their advantages in analyzing pharmaceuticals, biological samples, natural compounds, pesticides, and environmental pollutants, as well as foods and beverages. Graphical abstract

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Magnetic solid-phase extraction of pyrethroid and neonicotinoid insecticides separately in environmental water samples based on alkaline or acidic group-functionalized mesoporous silica

Abstract: Pyrethroids and neonicotinoids are widely used insecticides. However, their residues have unfavorable effects on ecological systems. Magnetic solid phase extraction is a reliable pretreatment method for better detection of insecticide...

Cited by 8 publications

References 62 publications

Controllable Preparation of Superparamagnetic Fe3O4@La(OH)3 Inorganic Polymer for Rapid Adsorption and Separation of Phosphate

Controllable Preparation of Superparamagnetic Fe3O4@La(OH)3 Inorganic Polymer for Rapid Adsorption and Separation of Phosphate

Determination of pyrethroids in water samples by dispersive solid‐phase extraction coupled with high‐performance liquid chromatography

A review of the modern principles and applications of solid-phase extraction techniques in chromatographic analysis

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