Preparation of Modified nano-SiO2 by Bismuth and Iron as a novel Remover of Methylene Blue from Water Solution

Salimi, Farhad; Tahmasobi, Keivan; Karami, Changiz; Jahangiri, Alireza

doi:10.29356/jmcs.v61i3.351

Cited by 38 publications

(13 citation statements)

References 43 publications

(46 reference statements)

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“…The first peak at 2θ = 24°, that is at a significantly high point in Fig. 1a, exhibited the anisotropic crystallographic nature of the silica particles and the manner the particles are alongside one another [40]. The size of the nano-SiO 2 crystalline was evaluated from the Debye-Scherrer equation (d = kλ/β cosθ) [41] where d is the average diameter of nanoparticles (nm), k is the Scherrer constant (k = 0.89), θ is the diffraction angle, λ is the wavelength of X-ray radiation (1.542 nm), and β is the full width at half maximum of X-ray diffraction peaks.…”

Section: Xrd Analysismentioning

confidence: 97%

Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

Cheira

2020

SN Appl. Sci.

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A new composite of poly sulfonamide/nano-silica composite (PSA/silica) was synthesized from the polymerization of sulfonamide in the presence of the prepared nano-silica. The prepared nano-silica, poly sulphonamide (PSA), and PSA/ silica composites were utilized for Th(IV) adsorption from sulfate solution. These composites described by XRD, surface area analysis, SEM-EDX, and FT-IR techniques. The influence parameters on the Th(IV) adsorption were pH solution, ionic strength, contact time, adsorbent dose, Th(IV) concentration, and temperature besides the coexisting ions. At best parameters (pH4, 0.1 g adsorbent amount, and 45 min contact time), 200 mg/L Th(IV) ions were quantitatively adsorbed from 100 mL solution. The maximum uptake capacities of the nano-silica, PSA, and PSA/silica composites attained 122, 75, and 197 mg/g at 298 K. From the kinetic and equilibrium data were found to the adsorption processes of three composites fitted well with kinetic model of pseudo-second-order and Langmuir adsorption isotherm model. Thermodynamic studies resulted that negative values for ∆H° indicated an exothermic while positive values ∆S° showed random behavior for Th(IV) adsorption, while negative values of ∆G° indicated spontaneous Th(IV) adsorption. The maximum Th(IV) desorption from the loaded adsorbents performed by 0.1 M/L HCl.

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Section: Xrd Analysismentioning

confidence: 97%

Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

Cheira

2020

SN Appl. Sci.

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“…A comparative evaluation of the maximum adsorption capacity of P@SiO 2 nanocomposite to adsorb MB dye according to the Langmuir isotherm and other adsorbent materials in the literature is listed in Table 7 [ 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 ]. Referring to the recent literature, equilibrium time and adsorption capacities are the main goals for scientists to investigate and develop many novel adsorbent materials.…”

Section: Resultsmentioning

confidence: 99%

A Novel P@SiO2 Nano-Composite as Effective Adsorbent to Remove Methylene Blue Dye from Aqueous Media

et al. 2023

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This work aims to prepare a novel phosphate-embedded silica nanoparticles (P@SiO2) nanocomposite as an effective adsorbent through a hydrothermal route. Firstly, a mixed solution of sodium silicate and sodium phosphate was passed through a strong acidic resin to convert it into hydrogen form. After that, the resultant solution was hydrothermally treated to yield P@SiO2 nanocomposite. Using kinetic studies, methylene blue (MB) dye was selected to study the removal behavior of the P@SiO2 nanocomposite. The obtained composite was characterized using several advanced techniques. The experimental results showed rapid kinetic adsorption where the equilibrium was reached within 100 s, and the pseudo-second-order fitted well with experimental data. Moreover, according to Langmuir, one gram of P@SiO2 nanocomposite can remove 76.92 mg of the methylene blue dye. The thermodynamic studies showed that the adsorption process was spontaneous, exothermic, and ordered at the solid/solution interface. Finally, the results indicated that the presence of NaCl did not impact the adsorption behavior of MB dye. Due to the significant efficiency and promising properties of the prepared P@SiO2 nanocomposite, it could be used as an effective adsorbent material to remove various cationic forms of pollutants from aqueous solutions in future works.

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“…As the number of active sites for a fixed amount of adsorbent decreases with time, so does the rate of adsorption. Based on the findings, it is concluded that the adsorption of AB 92 onto the nano-ZnO fiber follows pseudo second order rather than pseudo first order kinetics (Nethaji et al, 2013;Mohamed et al, 2017;Salaimi et al, 2017a;Salaimi et al, 2017b).…”

Section: Adsorption Kineticsmentioning

confidence: 94%

“…al. 2015;Belhachemi et al, 2011), but at higher temperatures, it follows the Freundlich isotherm (Malakootian et al, 2015;Salaimi et al, 2017a;Zafar et al, 2019;Sun et al, 2020;Yakar et al, 2020). In the Freundlich model, 1/n = 0 signifies irreversible, 1/n less than 1 indicates favorable, and 1/n greater than 1 indicates unfavorable (Zafar et al, 2019;Yakar et al, 2020).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Synthesis and characterization of nano-zinc oxide fiber: adsorption of acid blue 92 dye, isotherms, thermodynamics and kinetics

Qais

Islam

Othman

et al. 2022

Preprint

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Rapid industrialization, particularly textile/dyeing, causes substantial surface water contamination by various dyes and pigments globally. Bangladesh’s export-oriented textile industry has grown dramatically in recent decades, causing significant pollution of nearby water bodies. In this work, nano-zinc oxide was synthesized by a precipitation method with PEG 400 and characterized using SEM, XRD and FTIR techniques and found to be fiber-like, perfectly wurtzite and pure. The nano-ZnO was applied to remove acid blue 92, an ionic dye, from aqueous solution to investigate it as an adsorbent. The effects of pH, adsorbent dosage, AB92 concentration and contact time on adsorption process were investigated for optimization. According to the correlation coefficients ( R 2 ) and the fitting of Redlich-Peterson model, the adsorption process followed Langmuir isotherm at lower temperature and Freundlich isotherm at higher temperature with Temkin model. The adsorption process was found to be endothermic and spontaneous. For adsorption thermodynamics, ΔH was found to be +20.32 kJmol -1 , and ΔG was varied from -1.86 to -3.84 kJmol -1 as the temperature increased from 291 to 317 K. The adsorption kinetics exhibited pseudo second order. The Temkin isotherm and Elovich kinetic model suggested that the process to be chemisorption. The nano-ZnO showed tremendous re-usability as an adsorbent for the removal of AB92. The results are suggesting for designing nano-ZnO-based methods to remove organic pollutants efficiently from industrial effluents for ecological and sustainable development. The mechanisms of nano-ZnO fiber formation and anionic dye adsorption on nano-ZnO are also discussed.

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Preparation of Modified nano-SiO2 by Bismuth and Iron as a novel Remover of Methylene Blue from Water Solution

Cited by 38 publications

References 43 publications

Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

A Novel P@SiO2 Nano-Composite as Effective Adsorbent to Remove Methylene Blue Dye from Aqueous Media

Synthesis and characterization of nano-zinc oxide fiber: adsorption of acid blue 92 dye, isotherms, thermodynamics and kinetics

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