Kinetics and Thermodynamics of Adsorption Methylene Blue onto Tea Waste/CuFe&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; Composite

Hashemian, Saeedeh; Ardakani, Majeed Karimi; Salehifar, Hamila

doi:10.4236/ajac.2013.47a001

Cited by 44 publications

(24 citation statements)

References 23 publications

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“…The Langmuir model assumes that a monolayer adsorption of adsorbate is formed on a homogeneous adsorbent surface. The Langmuir model can be expressed as the following linear form (Hashemian et al, 2013) C e q e ¼ C e q m þ 1…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Optimization of dye adsorption using Fe₃O₄ nanoparticles encapsulated with alginate beads by Taguchi method

Rezaei

Haghshenasfard

Moheb

2016

Adsorption Science & Technology

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Adsorption of methylene blue from synthetic wastewater using Fe 3 O 4 nanoparticles encapsulated with alginate beads is carried out. The adsorption experiments were conducted in a continuous column equipped with an external magnetic field. The effects of important factors such as initial dye concentration, dose of Fe 3 O 4 in beads, adsorption time, and intensity of magnetic field on the Methylene blue (MB) adsorption have been studied experimentally. The Taguchi method is applied for optimization of operating conditions in dye adsorption onto the magnetic alginate beads. The variance analysis showed that the adsorption time is most effective factors by higher contribution percent in dye adsorption. The optimum conditions are achieved as 20 mg l À1 dye concentration, 1 Gy dose of Fe 3 O 4 in beads, 60 min of adsorption time, and 440 G of magnetic field intensity. The equilibrium adsorption data were analyzed using isotherm models and results revealed that the experimental data are in agreement with Freundlich isotherm model and the kinetic analyses showed that the adsorption kinetics was described accurately by pseudo-first-order model.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Optimization of dye adsorption using Fe₃O₄ nanoparticles encapsulated with alginate beads by Taguchi method

Rezaei

Haghshenasfard

Moheb

2016

Adsorption Science & Technology

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“…Tea waste is observed as a mass of compact fibers with tunnels, intermittent grooves and minute pores, which may serve as the route to enzyme penetration as reported by Hashmein et al . . The morphology of food waste looks like a compact globular mass of multiple units with hollow grooves.…”

Section: Resultsmentioning

confidence: 99%

Tea waste and food waste as a potential feedstock for biogas production

Yadav

Barbora

Rangan

et al. 2016

Env Prog and Sustain Energy

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Patáková P., Lipovský J., Čížková H., Fořtová J., Rychtera M., Melzoch K. (2009): Exploitation of food feedstock and waste for production of biobutanol. Czech J. Food Sci., 27: 276-283. Nine strains of solventogenic clostridia including the species C. acetobutylicum, C. beijerinckii, C. pasteurianum, and C. saccharoperbutylacetonicum were tested for the solvents production using potato, maize, and sugar beet molasses as substrates. The solvent concentrations reached in the cultivations with maize and molasses media (15.23 g/l and 13.70 g/l, respectively) looked promising. Based on the screening experiments, the strain C. acetobutylicum DSM 1731 was selected for further experiments in the laboratory bioreactor using the maize medium. The results achieved in this batch cultivation (total solvents concentration 12.91 g/l, the yield from maize starch 22%, the solvents formation productivity 0.22 g/l/h, and the ratio of B:A:E approximately 2:1:0) imply the potential of maize as an energetic crop for the biofuel production. In addition, whey protein concentrate was tested as a possible replacement of the usual but expensive media components, i.e. yeast autolysate and/or trypton, and it was confirmed that these substitutes functioned well in the glucose medium.

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“…A pure TiO 2 sample was synthesized through a hydrothermal method used by Ebrahimian et al [37]. The magnetic nanoparticles of CuFe 2 O 4 were prepared according to the method reported by Hashemian et al [38], and then they were calcinated at 700 °C for 5 h in air atmosphere. To prepare TCF, a 250-mL glass beaker was filled with 20 mL of TIP, 20 mL of ethanol, 1.6 mL of acetone and blended for 30 min in an ambient condition.…”

Section: Photocatalyst Synthesismentioning

confidence: 99%

One-pot hydrothermal synthesis and characterization of magnetic nanocomposite of titania-deposited copper ferrite/ferrite oxide for photocatalytic decomposition of methylene blue dye

et al. 2019

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The pure titania (TiO 2) and the heterogeneous ternary magnetic nanocomposite of copper ferrite/ferrite oxide (CuFe 2 O 4 / Fe 2 O 3) deposited by titanium dioxide (TiO 2) were fabricated using a facile one-pot hydrothermal synthesis for the photocatalytic decomposition of methylene blue (MB) dye, under visible light. The nanocomposite was encoded as TCF in this work, where T stands for TiO 2 , C for CuFe 2 O 4 and F for Fe 2 O 3. Various techniques such as powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy, diffuse reflectance spectroscopy, nitrogen physisorption, and vibrational sample magnetometry (VSM) were used to characterize the prepared samples. The PXRD data showed that the samples had pure anatase structure and the average crystal size of anatase TiO 2 in the pure titania and ternary nanocomposite were calculated 147 Å and 135 Å, respectively. The nitrogen physisorption analysis data showed that the pore diameter was increased from 10.6 nm in pure titania to 16.0 nm in TCF. The pore volume was also increased from 0.316 in titania to 0.383 cm 3 /g in TCF sample. It also increased the typical magnitude of the mesopores' diameter and volume per weight but it reduced the specific surface area of the samples. The VSM analysis of the ternary nanocomposite showed a considerable magnetic property of the sample (1.99 emu/g), qualifying it as a paramagnetic material. The photocatalytic decomposition efficiency of MB reached 77% and 68% in the presence of pure titania and TCF ternary nanocomposite, after 240-min exposure by the visible light. Active species trapping experiments showed that the major active species responsible for the photodecomposition of MB in the presence of TCF are O ⋅− 2 radicals and holes (h +).

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Kinetics and Thermodynamics of Adsorption Methylene Blue onto Tea Waste/CuFe<sub>2</sub>O<sub>4</sub> Composite

Cited by 44 publications

References 23 publications

Optimization of dye adsorption using Fe₃O₄ nanoparticles encapsulated with alginate beads by Taguchi method

Optimization of dye adsorption using Fe₃O₄ nanoparticles encapsulated with alginate beads by Taguchi method

Tea waste and food waste as a potential feedstock for biogas production

One-pot hydrothermal synthesis and characterization of magnetic nanocomposite of titania-deposited copper ferrite/ferrite oxide for photocatalytic decomposition of methylene blue dye

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Kinetics and Thermodynamics of Adsorption Methylene Blue onto Tea Waste/CuFe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt; Composite

Cited by 44 publications

References 23 publications

Optimization of dye adsorption using Fe3O4 nanoparticles encapsulated with alginate beads by Taguchi method

Optimization of dye adsorption using Fe3O4 nanoparticles encapsulated with alginate beads by Taguchi method

Tea waste and food waste as a potential feedstock for biogas production

One-pot hydrothermal synthesis and characterization of magnetic nanocomposite of titania-deposited copper ferrite/ferrite oxide for photocatalytic decomposition of methylene blue dye

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Kinetics and Thermodynamics of Adsorption Methylene Blue onto Tea Waste/CuFe<sub>2</sub>O<sub>4</sub> Composite

Optimization of dye adsorption using Fe₃O₄ nanoparticles encapsulated with alginate beads by Taguchi method

Optimization of dye adsorption using Fe₃O₄ nanoparticles encapsulated with alginate beads by Taguchi method