Multifunctional crosslinked chitosan/nitrogen-doped graphene quantum dot for wastewater treatment

Amari, Abdelfattah; Elboughdiri, Noureddine; Ghernaout, Djamel; Lajimi, Ramzi Hadj; Alshahrani, Ali M.; Tahoon, Mohamed A.; Rebah, Faouzi Ben

doi:10.1016/j.asej.2021.02.024

Cited by 34 publications

(17 citation statements)

References 22 publications

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“…Industrial wastewater treatment has become increasingly complex in recent decades as a result of the rapid industrialization and the presence of complex mixtures of toxic metal ions and organic dyes that harm human health and the environment [ 1 , 2 , 3 ]. The textile, paper, and plastic industries are the most common manufacturing purposes including dyes as important aromatic compounds [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

et al. 2021

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A magnetic polymer-based nanocomposite was fabricated by the modification of an Fe3O4/SiO2 magnetic composite with polypyrrole (PPy) via co-precipitation polymerization to form PPy/Fe3O4/SiO2 for the removal of Congo red dye (CR) and hexavalent chromium Cr(VI) ions from water. The nanocomposite was characterized using various techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), vibration sample magnetometer, and thermogravimetric analysis (TGA). The results confirm the successful fabrication of the nanocomposite in the size of nanometers. The effect of different conditions such as the contact time, adsorbent dosage, solution pH, and initial concentration on the adsorption process was investigated. The adsorption isotherm suggested monolayer adsorption of both contaminants over the PPy/Fe3O4/SiO2 nanocomposite following a Langmuir isotherm, with maximum adsorption of 361 and 298 mg.g−1 for CR dye and Cr(VI), respectively. Furthermore, the effect of water type on the adsorption process was examined, indicating the applicability of the PPy/Fe3O4/SiO2 nanocomposite for real sample treatment. Interestingly, the reusability of the nanocomposite for the removal of the studied contaminants was investigated with good results even after six successive cycles. All results make this nanocomposite a promising material for water treatment.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

et al. 2021

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“…In recent decades, industrial wastewater treatment has become increasingly complex. Increased population growth has led to an increase in industrialization and, consequently, an increase in the release of pollutants into wastewater, which threatens health and the environment [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Quaternization of Poly(2-diethyl aminoethyl methacrylate) Brush-Grafted Magnetic Mesoporous Nanoparticles Using 2-Iodoethanol for Removing Anionic Dyes

et al. 2021

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Magnetic mesoporous silica nanoparticles (Fe3O4-MSNs) were successfully synthesized with a relatively high surface area of 568 m2g−1. Fe3O4-MSNs were then modified with poly(2-diethyl aminoethyl methacrylate) (PDEAEMA) brushes using surface-initiated ARGET atom transfer radical polymerization (ATRP) (Fe3O4@MSN-PDMAEMA). Since the charge of PDEAEMA is externally regulated by solution pH, tertiary amines in the polymer chains were quaternized using 2-iodoethanol to obtain cationic polymer chains with a permanent positive charge (Fe3O4@MSN-QPDMAEMA). The intensity of the C−O peak in the C1s X-ray photoelectron spectrum increased after reaction with 2-iodoethanol, suggesting that the quaternization process was successful. The applicability of the synthesized materials on the removal of methyl orange (MO), and sunset yellow (E110) dyes from an aqueous solution was examined. The effects of pH, contact time, and initial dyes concentrations on the removal performance were investigated by batch experiments. The results showed that the Fe3O4@MSN-PDMAEMA sample exhibited a weak adsorption performance toward both MO and E110, compared with Fe3O4@MSN-QPDMAEMA at a pH level above 5. The maximum adsorption capacities of MO and E110 using Fe3O4@MSN-QPDMAEMA were 294 mg g−1 and 194.8 mg g−1, respectively.

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“…The enzyme immobilization was reached using different types of materials, including inorganic materials (silica, metal oxides, and clays) [13][14][15], organic materials (natural and synthetic polymers) [16,17], and hybrids (joining organic and inorganic materials) [18]. Among all the materials used, nanomaterials are widely used due to their exceptional properties [19][20][21][22][23][24], such as high surface area, ease of synthesis, low cost, and ease of modification that can enhance the enzymatic activity. Many studies reported the successful immobilization of laccase on the surface of nanomaterials, to improve its stability and catalytic properties, for the removal of the dye from aqueous media.…”

Section: Introductionmentioning

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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Multifunctional crosslinked chitosan/nitrogen-doped graphene quantum dot for wastewater treatment

Cited by 34 publications

References 22 publications

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water

Quaternization of Poly(2-diethyl aminoethyl methacrylate) Brush-Grafted Magnetic Mesoporous Nanoparticles Using 2-Iodoethanol for Removing Anionic Dyes

The Biocatalytic Degradation of Organic Dyes Using Laccase Immobilized Magnetic Nanoparticles

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