Magnetic Nitrogen-Doped Porous Carbon Nanocomposite for Pb(II) Adsorption from Aqueous Solution

Alzahrani, Fatimah Mohammed; Alsaiari, Norah Salem; Katubi, Khadijah Mohammedsaleh; Amari, Abdelfattah; Elkhaleefa, Abubakr; Rebah, Faouzi Ben; Tahoon, Mohamed A.

doi:10.3390/molecules26164809

Cited by 6 publications

(5 citation statements)

References 65 publications

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“…A reusable adsorbent is cost-effective and in agreement with green chemistry [77–79]. In this context, the reusability of MOF/NH 2 /Fe 3 O 4 composite was examined using methyl alcohol as an eluent for up to six successive cycles.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Application of Magnetized Lanthanum (III)-Based Metal-Organic Framework for the Organic Dye Removal from Water

Alzahrani

Alsaiari

Katubi

et al. 2022

Adsorption Science & Technology

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A hybrid composite based on metal-organic framework (MOF) was chemically fabricated by embedding the magnetic Fe3O4 nanoparticles within amino-functionalized porous La-MOF (MOF/NH2) to produce a highly efficient and reusable composite of MOF/NH2/Fe3O4. Different proper techniques were used for the characterization of surface morphology and chemical arrangement of the prepared MOF/NH2/Fe3O4 composite. The characterization results using various techniques including Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), Brunauer, Emmett, and Teller analysis (BET), and vibrating sample magnetometer (VSM) approved the successful fabrication of MOF with amino arms on its surface besides the well magnetization using magnetic nanoparticles. The MOF/NH2/Fe3O4 composite showed enhanced adsorption capacity (618 mg/g) toward methyl orange (MO) anionic dye which is higher than many commercial reported adsorbents due to the presence of many types of adsorption sites (NH2 groups and lanthanum sites), large surface area of MOF, and the synergetic effect of magnetic nanoparticles. Moreover, the MOF/NH2/Fe3O4 composite showed selective adsorption of MO dye from dye mixtures owing to the electrostatic attraction. Also, the MOF/NH2/Fe3O4 composite retained over 90% of its efficiency for the dye removal even after six successive cycles. So, the present study provided a practical strategy for the design of functional MOF hybrid composites. Furthermore, due to the adaptability of its architectural form, it is a potential adsorbent material for industrial wastewater treatment uses.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Application of Magnetized Lanthanum (III)-Based Metal-Organic Framework for the Organic Dye Removal from Water

Alzahrani

Alsaiari

Katubi

et al. 2022

Adsorption Science & Technology

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“…Te adsorption study was performed using 100 ml of the synthetic wastewater at room temperature. Te adsorption study was performed by varying the pH (2, 3.5, 5, 6.5, and 8), initial contaminant concentration (0.1, 0.5, 1, and 2 g L − 1 ), contact time (5,10,15, and 20 minutes), and magnetite nanoparticle concentration (0.5, 1, 2, and 5 g.L − 1 ) factors.…”

Section: Adsorption Experimentmentioning

confidence: 99%

“…In order to determine the adsorption mechanism, Langmuir and Freundlich isotherms were used in this research [47,48]. Te linear equation of the Langmuir isotherm is given in equations ( 9) and (10).…”

Section: Adsorption Isothermmentioning

confidence: 99%

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Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

Mozaffari

Khodabakhshi

Azizi³

2023

Journal of Chemistry

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Tea waste was used to successfully synthesize magnetic nanoparticles (TWMNPs). In this investigation, Pb (II) was eliminated by tea waste modified with magnetite nanoparticles (TWMNPs) was investigated. To prepare the TWMNPs, FeCl3.6H2O was dissolved in double distilled water (DDW) and 20 g of pulp tea was added slowly and stirred, after 30 min TWMNPs adsorbent were separated through an external magnetic field and washed three times with double distilled water (DDW) and ethanol then dried at 60°C. The FESEM test of TWMNPs shows the particle size in the range of 15–20 nm and spherical/cuboid-shaped crystal structure of Fe3O4 (magnetite). X-ray analysis showed that the main XRD diffraction peaks of TWMNPs are related to Fe3O4, HighScore plus X’Pert software was used to identify the phase in this sample. The specific surface area of the prepared magnetite nanoparticles was 25.2 m2.g−1. The pore volume, maximum pore radius, and VSM of TWMNPs were 14.4 cm3.g−1, 2.3 nm, and 3.37–2.41, respectively. The effects of various parameters, such as contact time, pH, concentration, and adsorbent dosage, were studied. The experimental isotherm data were analyzed using the Langmuir and Freundlich models, and it was found that the removal process followed the Langmuir isotherm and the maximum adsorption capacity calculated by Langmuir fitting was 10.67 mg.g−1. In addition, the adsorption kinetics followed the first-order kinetic model and the value of rate constant was found to be 14.04 × 10−2 min−1. The results showed that increasing the pH level led to a rise in the response level and Pb (II) removal. Also, the trend in Pb (II) removal and response level had an increase with increasing the initial concentration of Pb (II). Increasing contact time from 5 to 20 minutes has a slight effect on Pb (II) removal. Considering the results, TWMNPs could lead to suitable results for the removal of Pb (II) from wastewater containing this metal. And the maximum adsorption capacity was found to be 10.67 mg.g−1.

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“…Both nanoparticle-immobilized laccase (Fe 3 O 4 and CuFe 2 O 4 ) were investigated for the degradation of DR23 dye several successive times, as shown in Figure 6. The reusability has great importance in minimizing the overall cost of treatment, minimizing the enzyme wastes, and increasing its industrial applicability [44][45][46]. According to Figure 6, there is higher relative reusability of both the nanobiocatalysts towards the degradation of DR23 dye, with a gradual decrease in the efficiency of decolorization from cycle 1 to cycle 5.…”

Section: Reusabilitymentioning

confidence: 99%

The Biocatalytic Degradation of Organic Dyes Using Laccase Immobilized Magnetic Nanoparticles

et al. 2021

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Free laccase has limitations for its use in industrial applications that require laccase immobilization on proper support, to improve its catalytic activity. Herein, the nanoparticles of magnetic iron oxide (Fe3O4) and copper ferrite (CuFe2O4) were successfully used as support for the immobilization of free laccase, using glutaraldehyde as a cross-linker. The immobilization conditions of laccase on the surface of nanoparticles were optimized to reach the maximum activity of the immobilized enzyme. The synthesized free nanoparticles and the nanoparticle-immobilized laccase were characterized using different techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), vibrating sample magnetometer (VSM), and thermogravimetric analysis (TGA). CuFe2O4 nanoparticles, as support, enhanced laccase activity compared to free laccase and Fe3O4 nanoparticle-immobilized laccase that appeared during the study of pH, temperature, and storage stability on free and immobilized laccase. The CuFe2O4 and Fe3O4 nanoparticle-immobilized laccase showed superior activity in a wide pH range, temperature range, and storage period, up to 20 days at 4.0 °C, when compared to free laccase. Additionally, the synthesized nanobiocatalysts were examined and optimized for the biodegradation of the anionic dye Direct Red 23 (DR23). HPLC analysis was used to confirm the dye degradation. The reusability of immobilized laccases for the biodegradation of DR23 dye was investigated for up to six successive cycles, with a decolorization efficiency over 70.0%, which indicated good reusability and excellent stability.

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Magnetic Nitrogen-Doped Porous Carbon Nanocomposite for Pb(II) Adsorption from Aqueous Solution

Cited by 6 publications

References 65 publications

Synthesis, Characterization, and Application of Magnetized Lanthanum (III)-Based Metal-Organic Framework for the Organic Dye Removal from Water

Synthesis, Characterization, and Application of Magnetized Lanthanum (III)-Based Metal-Organic Framework for the Organic Dye Removal from Water

Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

The Biocatalytic Degradation of Organic Dyes Using Laccase Immobilized Magnetic Nanoparticles

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