Synthesis and application of recyclable magnetic freeze-dried graphene oxide nanocomposite as a high capacity adsorbent for cationic dye adsorption

Faghihi, Asghar; Vakili, Mohammad; Hosseinzadeh, Ghader; Farhadian, Mousa; Jafari, Ziaeddin

doi:10.1080/19443994.2015.1134357

Cited by 24 publications

(10 citation statements)

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“…The mixture was thoroughly mixed with controlled temperature of about 40 °C for 60 min using a magnetic stirrer. 0.38 g of chitosan was dissolved in with (1% by volume) acetic acid solution and transferred to the mixture and was thoroughly mixed with magnetic stirrer for 2.5 h …”

Section: Methodsmentioning

confidence: 99%

“…The mixture was thoroughly mixed with controlled temperature of about 40 8C for 60 min using a magnetic stirrer. 0.38 g of chitosan was dissolved in with (1% by volume) acetic acid solution and transferred to the mixture and was thoroughly mixed with magnetic stirrer for 2.5 h. 29 50 mL of NH 4 OH was added to the brownish solution slowly drop wise for 2.5 h under inert nitrogen atmosphere at 40 8C. During the precipitation reaction the color of the solution was changed from brown to black which is the indication of the magnetic chitosan formation.…”

Section: Preparation Of Magnetite-chitosan Particles (Fe 3 O 4 -Chitomentioning

confidence: 99%

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Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Ravi

Jabasingh

2017

J of Applied Polymer Sci

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Chitosan (90% deacetylated) coated magnetic adsorbent prepared by coprecipitation method to remove Cr(VI) from its aqueous solution. The experimental studies depicts that the predominant option for removal of Chromium by adsorption from its aqueous phase using Magnetic‐Chitosan (MC). The subsequent physical, chemical, and magnetic properties of MC were characterized by X‐ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectrometer, vibrating sample magnetometer. The influence of batch process parameters such as contact time, initial concentration, pH, and coexisting anions were investigated. The Box‐Behnken experimental design in response surface methodology was performed to design the experiment optimal operating conditions. The maximum percentage reduction of Cr(VI) is 96.3 that was obtained by magnetic chitosan with the optimal operating conditions of 149.53 mg/L at pH of 5.32 at the contact time of 80 min and at the temperature of 303 K. The average diameter of the magnetic chitosan was calculated from X‐ray diffractometer analysis as 24.5 nm. The equilibrium adsorption isotherm models such as Langmuir and Freundlich and the adsorption kinetics such as pseudo first order, pseudo second order and intra‐particle diffusion kinetic model were analyzed. The experimental data's suited for the best fit with the Langmuir isotherm model and pseudo first order kinetic model. It also revealed that Cr(VI) adsorption on MC is intrinsically exothermic and spontaneous. The magnetic chitosan was also used to investigate for the removal of Cr(VI) from the real water sources such as surface, underground, and tannery wastewater. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45878.

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Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Magnetite-chitosan Particles (Fe 3 O 4 -Chitomentioning

confidence: 99%

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Ravi

Jabasingh

2017

J of Applied Polymer Sci

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“…With so many GO modification paths, the methods used vary according to the functional groups used. Co-precipitation is commonly used to produce GO nano adsorbent products with metal oxide composites or magnetic GO (Faghihi et al, 2016;Neolaka et al, 2020;Singh et al, 2019;Wu et al, 2016). GO modified with other composites that are magnetic using suitable methods such as the Massart method (Hejazi Khah et al, 2021), solvothermal (Chen et al, 2021), polymerized complex (Tran et al, 2020) or other modifications.…”

Section: Dye Adsorption Applications In Textile Wastewater Treatment ...mentioning

confidence: 99%

Adsorption of Dyes Using Graphene Oxide-Based Nano-Adsorbent: A Review

et al. 2022

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Graphene Oxide (GO) based adsorbents have attracted much attention from researchers because there have been many reports that they are effective for removing dyes from aqueous environments. That is because GO has good mechanical, electrical, optical and chemical properties, so graphene and its derivatives, such as graphene oxide, have been used in various applications in the field of environmental management. Modifying GO into nano size is an effort to improve its performance in removing dyes. This review uses a database from Science Direct, Google Scholar and Springer, which was screened using graphene oxide, pigments, adsorption and nano adsorbent. The performance of the nano adsorbent showed quite good results in the removal of dyes. The isotherm model suitable for adsorption varies between Langmuir, Freundlich and Redlich-Peterson isotherms. Pseudo-second-order (PSO) is the best model to explain the adsorption process kinetics. Nano-adsorbent modification can be reused at least five times with a reduced adsorption capacity of 4-8%. Studies related to adsorption with GO-based nano adsorbents show promising results in pollutant removal. Still, aspects such as synthesis method, surface functional groups interaction and dye ions and the stability of synthesis products need to be investigated further.

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“…Out of which adsorption procedure has been proven to be an effective process due to its high efficacy, recovery and recycling ability of adsorbents, and also have the ability to decolorize dye loaded wastewater in large scale basis . A wide variety of adsorbents (activated carbon, zeolites, clays, industrial by‐products, agricultural wastes, biomass, and polymeric materials) have been studied for remediation of dye loaded wastewater, however, majority of these adsorbents suffer from low uptake capacity and inconveniences of separation/recovery . Currently metal oxide based nanoscale adsorbents and their composites are gaining interest as adsorbent due to their merits of smallness in size, high surface area, high mechanical and thermal strength, availability of abundant reactive atoms and vacant reactive surface sites on their surface .…”

Section: Introductionmentioning

confidence: 99%

“…[9,10] A wide variety of adsorbents (activated carbon, zeolites, clays, industrial by-products, agricultural wastes, biomass, and polymeric materials) have been studied for remediation of dye loaded wastewater, however, majority of these adsorbents suffer from low uptake capacity and inconveniences of separation/recovery. [11] Currently metal oxide based nanoscale adsorbents and their composites are gaining interest as adsorbent due to their merits of smallness in size, high surface area, high mechanical and thermal strength, availability of abundant reactive atoms and vacant reactive surface sites on their surface. [3,12] However, nanoscale adsorbents in fine powder form are tough to recycle after use on account of costly and difficult solid/liquid separation.…”

Section: Introductionmentioning

confidence: 99%

Mixed phase Fe₂O₃/Mn₃O₄ magnetic nanocomposite for enhanced adsorption of methyl orange dye: Neural network modeling and response surface methodology optimization

Bhowmik

Deb

Debnath

et al. 2017

Applied Organom Chemis

100

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In this research, a novel magnetic mesoporous adsorbent with mixed phase of Fe2O3/Mn3O4 nanocomposite was prepared by a facile precipitating method and characterized extensively. The prepared nanocomposite was used as adsorbent for toxic methyl orange (MO) dye removal from aqua matrix considering its high surface area (178.27 m2/g) with high saturation magnetization (23.07 emu/g). Maximum dye adsorption occurs at solution pH 2.0 and the electrostatic attraction between anionic form of MO dye molecules and the positively charged nanocomposite surface is the main driving force behind this adsorption. Response surface methodology (RSM) was used for optimizing the process variables and maximum MO removal of 97.67% is obtained at optimum experimental condition with contact time, adsorbent dose and initial MO dye concentration of 45 min, 0.87 g/l and 116 mg/l, respectively. Artificial neural network (ANN) model with optimum topology of 3–5–1 was developed for predicting the MO removal (%), which has shown higher predictive ability than RSM model. Maximum adsorption capacity of this nanocomposite was found to be 322.58 mg/g from Langmuir isotherm model. Kinetic studies reveal the applicability of second‐order kinetic model with contribution of intra‐particle diffusion in this process.

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Synthesis and application of recyclable magnetic freeze-dried graphene oxide nanocomposite as a high capacity adsorbent for cationic dye adsorption

Cited by 24 publications

References 62 publications

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Adsorption of Dyes Using Graphene Oxide-Based Nano-Adsorbent: A Review

Mixed phase Fe₂O₃/Mn₃O₄ magnetic nanocomposite for enhanced adsorption of methyl orange dye: Neural network modeling and response surface methodology optimization

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Synthesis and application of recyclable magnetic freeze-dried graphene oxide nanocomposite as a high capacity adsorbent for cationic dye adsorption

Cited by 24 publications

References 62 publications

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Adsorption of Dyes Using Graphene Oxide-Based Nano-Adsorbent: A Review

Mixed phase Fe2O3/Mn3O4 magnetic nanocomposite for enhanced adsorption of methyl orange dye: Neural network modeling and response surface methodology optimization

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Mixed phase Fe₂O₃/Mn₃O₄ magnetic nanocomposite for enhanced adsorption of methyl orange dye: Neural network modeling and response surface methodology optimization