Coextraction of acidic, basic and amphiprotic pollutants using multiwalled carbon nanotubes/magnetite nanoparticles@polypyrrole composite

Asgharinezhad, Ali Akbar; Ebrahimzadeh, Homeira

doi:10.1016/j.chroma.2015.07.087

Cited by 73 publications

(26 citation statements)

References 53 publications

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“…Selection of the optimal functionalization mode of MNPs is the most important parameter in MSPE and different types were assayed, including oleic acid , polystyrene , polyaniline , polypyrrole , chitosan , (3‐aminopropyl)triethoxysilane , and polydopamine .…”

Section: Resultsmentioning

confidence: 99%

“…The magnetic nanocomposite was synthesized according to the literature . First, MWCNTs were purified with a 1 mol/L HNO 3 solution for 6 h at room temperature and then washed several times with distilled water and dried at 100°C.…”

Section: Methodsmentioning

confidence: 99%

“…The magnetic nanocomposite was synthesized according to the literature [45]. First, MWCNTs were purified with a 1 mol/L HNO 3 solution for 6 h at room temperature and then washed several times with distilled water and dried at 100 • C. Then, 0.5 g of MWCNTs were weighed and suspended in 250 mL of a solution containing 0.85 g (NH 4 ) 2 Fe(SO 4 ) 2 ⋅6H 2 O and 0.422 g FeCl 3 at 50 • C. The suspension was sonicated for 20 min and 20 mL of 8 mol/L NH 4 OH aqueous solution was added dropwise to precipitate the Fe 3 O 4 on the wall of the MWCNTs, while the mixture solution was being sonicated.…”

Section: Synthesis Of the Magnetic Nanocompositementioning

confidence: 99%

“…Selection of the optimal functionalization mode of MNPs is the most important parameter in MSPE and different types were assayed, including oleic acid [46], polystyrene [33], polyaniline [47], polypyrrole [45], chitosan [48], (3-aminopropyl)triethoxysilane [49], and polydopamine [50]. Figure 2A shows that most analytes led to better extraction efficiency when MWCNTs were used due to the specific interactions between the carbon nanotubes (CNTs) and the pyrethroids such as hydrophobic interactions, strong π-π interactions between bulk π systems on CNT surfaces and pyrethroid molecules with C=C double bonds or benzene rings, hydrogen bonds of the functional groups on CNT surfaces, and electrostatic interactions because of the charged CNT surface.…”

Section: Optimization Of the Mspe Stepmentioning

confidence: 99%

“…The optimal experimental conditions for the pyretroid MSPE adsorption step were studied using a multivariate Taguchi design for four variables at four levels: magnetic Fe 3 O 4 -MWCNTs nanocomposite mass (10,20,40, and 60 mg), adsorption time (15,30,45, and 60 min), volume of the aqueous phase (10, 20, 30, and 40 mL), and pH of the aqueous phase (4, 5.5, 7, and 9). The nanocomposite mass produced higher signals for 10 mg, giving a low recovery for lower mass as it was not enough to completely absorb target analytes.…”

Section: Optimization Of the Mspe Stepmentioning

confidence: 99%

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Magnetic solid‐phase extraction or dispersive liquid–liquid microextraction for pyrethroid determination in environmental samples

Pastor-Belda

Navarro-Jiménez

Garrido

et al. 2018

J of Separation Science

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The determination of 15 pyrethroids in soil and water samples was carried out by gas chromatography with mass spectrometry. Compounds were extracted from the soil samples (4 g) using solid-liquid extraction and then salting-out assisted liquid-liquid extraction. The acetonitrile phase obtained (0.8 mL) was used as a dispersant solvent, to which 75 μL of chloroform was added as an extractant solvent, submitting the mixture to dispersive liquid-liquid microextraction. For the analysis of water samples (40 mL), magnetic solid-phase extraction was performed using nanocomposites of magnetic nanoparticles and multiwalled carbon nanotubes as sorbent material (10 mg). The mixture was shaken for 45 min at room temperature before separation with a magnet and desorption with 3 mL of acetone using ultrasounds for 5 min. The solvent was evaporated and reconstituted with 100 μL acetonitrile before injection. Matrix-matched calibration is recommended for quantification of soil samples, while water samples can be quantified by standards calibration. The limits of detection were in the range of 0.03-0.5 ng/g (soil) and 0.09-0.24 ng/mL (water), depending on the analyte. The analyzed environmental samples did not contain the studied pyrethroids, at least above the corresponding limits of detection.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of the Magnetic Nanocompositementioning

confidence: 99%

Section: Optimization Of the Mspe Stepmentioning

confidence: 99%

Section: Optimization Of the Mspe Stepmentioning

confidence: 99%

See 3 more Smart Citations

Magnetic solid‐phase extraction or dispersive liquid–liquid microextraction for pyrethroid determination in environmental samples

Pastor-Belda

Navarro-Jiménez

Garrido

et al. 2018

J of Separation Science

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Polypyrrole/Fe₃O₄/CNT as a recyclable and highly efficient catalyst for one‐pot three‐component synthesis of pyran derivatives

Hojati

Amiri

MoeiniEghbali

et al. 2018

Applied Organom Chemis

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Polypyrrole (PPY)/Fe 3 O 4 /CNT has been synthesized and characterized by FT-IR, TEM and SEM techniques and its catalytic activity has been evaluated in the synthesis of several series of pyran derivatives. Tetrahydrobenzo[b]pyranes, 4Hpyran-3-carboxylates, 4H,5H-pyrano[3,2-c]chromenes and dihydropyrano[2,3-c] pyrazoles have been successfully prepared from one-pot three-component condensation of aldehyde, malononitrile and active methylene-containing compounds (dimedone /ethyl acetoacetate/4-hydroxycoumarin/3-methyl-2pyrazoline-5-one) using PPY/Fe 3 O 4 /CNT as a new and reusable heterogeneouscatalyst. The present method offer several advantages such as; high yields of products, short reaction times, easy work-up procedure and easy separation of the catalyst from the reaction mixture due to its magnetic character. Furthermore, chemoselective synthesis of bis-benzo[b]pyran from terephthalaldehyde can be achieved by this method.

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Synthesis of magnetite@MIL‐53(Fe)‐NH‐CS₂ via postsynthetic modification for extraction/separation of ultra‐trace Hg (II) from some real samples and its subsequent quantification by CVAAS

Veisi

Lorestani

Sobhanardakani

et al. 2021

Applied Organom Chemis

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Herein, at first, a magnetite@MIL-53(Fe)-NH 2 core-shell nanocomposite was fabricated and then modified via postsynthetic modification by dithiocarbamate moieties to obtain a magnetite@MIL-53(Fe)-NH-CS 2 nano-adsorbent.The constructed material was used for extraction/separation of ultra-trace Hg (II) from seawater, river water, and fish samples, and then the enriched mercury was quantified by CVAAS instrument. Characterization of magnetite@MIL-53(Fe)-NH-CS 2 nano-adsorbent was carried out by scanning electron microscopy, X-ray diffraction analysis, CHNS analysis, FT-IR spectroscopy, and magnetometry. Optimization of the affecting variables was conducted via the design of experiment methodology. After that, adsorption isotherms and kinetic studies were carried out. The experimental data were well fitted to the Langmuir and pseudo second-order kinetic models for adsorption study and kinetic study, respectively. Accordingly, a maximum adsorption capacity and a Langmuir constant (K L ) of 250 mg g À1 and 0.102 L mg À1 were obtained, respectively. The LOD and linearity of the preconcentration method were

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Coextraction of acidic, basic and amphiprotic pollutants using multiwalled carbon nanotubes/magnetite nanoparticles@polypyrrole composite

Cited by 73 publications

References 53 publications

Magnetic solid‐phase extraction or dispersive liquid–liquid microextraction for pyrethroid determination in environmental samples

Magnetic solid‐phase extraction or dispersive liquid–liquid microextraction for pyrethroid determination in environmental samples

Polypyrrole/Fe₃O₄/CNT as a recyclable and highly efficient catalyst for one‐pot three‐component synthesis of pyran derivatives

Synthesis of magnetite@MIL‐53(Fe)‐NH‐CS₂ via postsynthetic modification for extraction/separation of ultra‐trace Hg (II) from some real samples and its subsequent quantification by CVAAS

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Coextraction of acidic, basic and amphiprotic pollutants using multiwalled carbon nanotubes/magnetite nanoparticles@polypyrrole composite

Cited by 73 publications

References 53 publications

Magnetic solid‐phase extraction or dispersive liquid–liquid microextraction for pyrethroid determination in environmental samples

Magnetic solid‐phase extraction or dispersive liquid–liquid microextraction for pyrethroid determination in environmental samples

Polypyrrole/Fe3O4/CNT as a recyclable and highly efficient catalyst for one‐pot three‐component synthesis of pyran derivatives

Synthesis of magnetite@MIL‐53(Fe)‐NH‐CS2 via postsynthetic modification for extraction/separation of ultra‐trace Hg (II) from some real samples and its subsequent quantification by CVAAS

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Product

Resources

About

Polypyrrole/Fe₃O₄/CNT as a recyclable and highly efficient catalyst for one‐pot three‐component synthesis of pyran derivatives

Synthesis of magnetite@MIL‐53(Fe)‐NH‐CS₂ via postsynthetic modification for extraction/separation of ultra‐trace Hg (II) from some real samples and its subsequent quantification by CVAAS