Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said, Abd El‐Aziz A.; Goda, Mohamed N.

doi:10.1002/slct.202100575

Cited by 15 publications

(21 citation statements)

References 87 publications

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“…The high values of K F (3.41 to 16.98) and 1/n (0.653 to 1.003) found in this study indicate that heterogeneous nature and positive cooperativity binding facilitated CV adsorption by nickel zinc ferrite. Furthermore, high K F values indicate a powerful contact between the ferrite surface and dye molecules [59] . Additionally, the K F values are in the sequence K F (at x=0.1)>K F (at x=0.9), which is the same as the order of Q m variation from the Langmuir isotherm.…”

Section: Resultsmentioning

confidence: 74%

“…The determined Tempkin parameter values are summarized in Table 5. The existence of chemisorption rather than physisorption is revealed by these parameters, as evidenced by the values of B T [59] . Again, the K T values reveal that samples rich with zinc ferrite surfaces have a larger tendency for remediating the CV dye than samples rich with nickel ferrite surfaces.…”

Section: Resultsmentioning

confidence: 85%

“…Furthermore, high K F values indicate a powerful contact between the ferrite surface and dye molecules. [59] Additionally, the K F values are in the sequence K F (at x = 0.1) > K F (at x = 0.9), which is the same as the order of Q m variation from the Langmuir isotherm.…”

Section: Chemistryselectmentioning

confidence: 72%

“…The pseudo-first order and pseudo-second order equations [58,59] can be mathematically expressed respectively in equations ( 14) and ( 15) as follows:…”

Section: Adsorption Kineticmentioning

confidence: 99%

“…When the value of E < 8 kJ mol À 1 , it is assumed that the adsorption is of a physical character (physisorption), whereas when E > 8 kJ mol À 1 , it is assumed that the adsorption is of a chemisorption nature. [59] The DÀ R isotherm constants Q m and k D were calculated using the slope and intercept of the plotted graph between ln q e versus ε 2 (Figure 7(d)) and the calculated parameters are summarized in Table ( 5). From the obtained parameters, the following could be estimated: (i) The Q m values for samples rich with zinc ferrite are more closely spaced with those measured from the Langmuir isotherm than samples rich with nickel ferrite, and (ii) the adsorption of CV dye is chemical in nature, with all mean free energies greater than 8 kJ mol À 1 , confirming the findings gathered by the Tempkin isotherm.…”

Section: Dubinin-radushkevich (D-r) Isothermmentioning

confidence: 99%

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Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni_1‐xZn_xFe₂O₄ Magnetic Nanocomposites

et al. 2022

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Crystal violet (CV) dye is one of the most poisonous colors primarily produced in the textile industry. In the current study, the co-precipitation assisted ultrasonic radiation method was used to synthesized Ni 1-x Zn x Fe 2 O 4 magnetic nanoparticles for the CV dye removal from aqueous solutions. The adsorbents were characterized by vibrating specimen magnetometer (VSM), X-ray diffraction (XRD), High resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), and nitrogen sorption analysis. XRD confirmed the successful synthesis of Ni 1-x Zn x Fe 2 O 4 single phase with a characteristic diffraction (311) peak at 2θ = 35.5°. XPS analysis proved the successful substitution of Ni 2 + by Zn 2 + ions in the spinel structure. N 2 sorption revealed that, the prepared adsorbent exhibited a mesoporous structure of slit shaped and narrow entrances, especially at high annealing temperatures. Results revealed that the magnetic Ni 0.1 Zn 0.9 Fe 2 O 4 nano adsorbent offered a maximum adsorption capacity of 473.9 mg g À 1 at pH 10.0, which is significantly greater than that of the other noted for CV removal. In addition, ferromagnetic nature was observed by Ni 0.5 Zn 0.5 Fe 2 O 4 with a saturation magnetization value of 60.1 emg/g. Equilibrium and kinetic studies demonstrated that, the adsorption is of chemical nature and controlled with pore and film diffusion. Finally, we concluded that Ni 1-x Zn x Fe 2 O 4 can be utilized as a potential magnetic composite for the purification of CV contaminated water.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 85%

Section: Chemistryselectmentioning

confidence: 72%

“…The pseudo-first order and pseudo-second order equations [58,59] can be mathematically expressed respectively in equations ( 14) and ( 15) as follows:…”

Section: Adsorption Kineticmentioning

confidence: 99%

Section: Dubinin-radushkevich (D-r) Isothermmentioning

confidence: 99%

See 3 more Smart Citations

Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni_1‐xZn_xFe₂O₄ Magnetic Nanocomposites

et al. 2022

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CuMOF@Faujasite nanocomposite as a novel catalyst for hydrogen production

Said,

Dardir,

Gabr

et al. 2024

Applied Organom Chemis

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Energy production is one of the most crucial issues presently attracting global attention. In this work, a CuMOF@Faujasite nanocomposite was synthesized and utilized as a novel efficient catalyst for hydrogen production. The produced composite was first characterized using X‐ray diffraction (XRD), Fourier‐ transform infrared (FT‐IR), thermogravimetric analysis (TGA), and differential scanning calorimetry. Surface properties were analyzed via nitrogen adsorption–desorption isotherms. All characterization results revealed the formation of a pure and well‐defined crystalline phase, with a high specific surface area (SBET) of 286 m2/g (SBET of Faujasite is 35 m2/g). Moreover, the morphology and compositional analysis of the nanocomposite were assured through the scanning (SEM) and transmission (TEM) electron microscope and X‐ray photospectroscopy (XPS). SEM and TEM images revealed sponge‐like spheres that are related to Faujasite besides small spherical particles related to CuBDC MOF. XPS analysis revealed a low content of CuMOF in the nanocomposite. The catalytic activity of the nanocomposite was tested for the dehydrogenation of NaBH4. The impact of NaBH4 concentration, weight of the catalyst, and the reaction temperature on NaBH4 hydrolysis was investigated. A hydrogen generation rate (HGR) of 484 mLmin−1 g−1 at 30 °C was achieved using 50 mg of the catalyst and 0.05 mol/l of NaBH4 owing to the high specific area and the selective active sites for such hydrolytic reaction. The kinetic analysis of the activity data indicates the first‐order behavior at low concentrations of NaBH4. Furthermore, at concentrations ≥0.065 mol L−1, zero‐order kinetics was predominant. The time needed for completion of the hydrolysis reaction was found to be decreased (~20 min) by increasing the catalyst mass as well as NaBH4 concentration or even by elevating the reaction temperature (~4 min at 60 °C). The activation energy was estimated; it was found to be 70.5 KJ mol−1. Ultimately, our catalyst showed a reasonable rate of hydrogen production, as compared to others reported earlier.

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Structure and Property of Pesticide Intercalation into Laponite Assisted by Silane Coupling Agent

2021

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The APTES-LAP was first prepared by silane coupling agent of 3-aminopropyltriethoxysilane (APTES) intercalation into laponite (LAP). The effect of m(APTES)/m(LAP) mass ratio and reaction time on the structure of APTES-LAP were investigated. The results showed that the interlayer distance of APTES-LAP was about 1.75 ∼ 1.89 nm as the mass ratio of m(APTES)/m(LAP) was between 0.5 and 2.0, reaction time was 24 h. Then, pesticides of beta-cypermethrin (BCT) and imidacloprid (IMP) were separately introduced into APTES-LAP to prepare BCT/ APTES-LAP and IMP/APTES-LAP composites. Their structures and thermal stabilities were characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermogravimetry/differen-tial thermal analysis (TGA/DTA), hydrogen magnetic resonance ( 1 H NMR) and scanning electron microscopy (SEM) techniques. Compared with APTES-LAP, the first diffraction peaks of BCT/APTES-LAP and IMP/APTES-LAP moved forward, and interlayer distance increased to about 2.2 nm. The existence of APTES and pesticide were further confirmed in the gallery. Furthermore, the release behaviors of pesticide from BCT/APTES-LAP and IMP/APTES-LAP in pH 5.0 and 6.8 buffer solutions were investigated and discussed. The pseudo-second-order and the parabolic diffusion models were used to fit the release data. This work was helpful to develop the application of composites in pesticide controlled release formulation.

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Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Cited by 15 publications

References 87 publications

Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni_1‐xZn_xFe₂O₄ Magnetic Nanocomposites

Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni_1‐xZn_xFe₂O₄ Magnetic Nanocomposites

CuMOF@Faujasite nanocomposite as a novel catalyst for hydrogen production

Structure and Property of Pesticide Intercalation into Laponite Assisted by Silane Coupling Agent

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Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Cited by 15 publications

References 87 publications

Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni1‐xZnxFe2O4 Magnetic Nanocomposites

Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni1‐xZnxFe2O4 Magnetic Nanocomposites

CuMOF@Faujasite nanocomposite as a novel catalyst for hydrogen production

Structure and Property of Pesticide Intercalation into Laponite Assisted by Silane Coupling Agent

Contact Info

Product

Resources

About

Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni_1‐xZn_xFe₂O₄ Magnetic Nanocomposites

Adsorptive Remediation of Hazardous Crystal Violet Dye using Ni_1‐xZn_xFe₂O₄ Magnetic Nanocomposites