Adsorption of methyl orange on mesoporous γ-Fe2O3/SiO2 nanocomposites

Deligeer, W.; Gao, Yindong; Asuha, S.

doi:10.1016/j.apsusc.2010.11.067

Cited by 86 publications

(28 citation statements)

References 19 publications

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“…In a work published by Deligeer et al [12], c-Fe 2 O 3 / SiO 2 nanocomposite was synthesized and used to adsorb MO. Adsorption of MO onto this nanocomposite obeyed Freundlich isotherm, too [12].…”

Section: Equilibrium Isotherm Modelsmentioning

confidence: 99%

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Magnetic solid phase adsorption, preconcentration and determination of methyl orange in water samples using silica coated magnetic nanoparticles and central composite design

et al. 2014

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This work evaluates the efficiency of SiO 2 -coated Fe 3 O 4 magnetic nanoparticles (SMNPs) for adsorption of methyl orange (MO). Adsorption of MO on the studied nanoparticle was developed for removal, preconcentration and spectrophotometric determination of trace amounts of it. To find the optimum adsorption conditions, the influence of pH, dosage of the adsorbent and contact time was explored by central composite design. In pH 2.66, with 10.0 mg of the SMNPs and time of 30.0 min, the maximum adsorption of MO was obtained. The experimental adsorption data were analyzed by the Langmuir and Freundlich adsorption isotherms. Both models were fitted to the equilibrium data and the maximum monolayer capacity q max of 53.19 mg g -1 was obtained for MO. Moreover, the sorption kinetics was fitted well to the pseudo-second-order rate equation model. The results showed that desorption efficiencies higher than 99 % can be achieved in a short contact time and in one step elution by 2.0 mL of 0.1 mol L -1 NaOH. The SMNPs were washed with deionized water and reused for two successive removal processes with removal efficiencies more than 90 %. The calibration curve was linear in the range of 10.0-120.0 ng mL -1 for MO. A preconcentration factor of about 45 % was achieved by the method.

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Section: Equilibrium Isotherm Modelsmentioning

confidence: 99%

“…MO adsorption on zeolites [4][5][6][7][8][9], magnetic materials [10][11][12] and other adsorbent [13][14][15][16][17][18][19] has been studied. However, the most commonly used adsorbent for color removal is activated carbon [20] because of its capability for efficient adsorption of a broad range of compounds.…”

Section: Introductionmentioning

confidence: 99%

Magnetic solid phase adsorption, preconcentration and determination of methyl orange in water samples using silica coated magnetic nanoparticles and central composite design

et al. 2014

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“…Since the linear growth of the adsorption capacities was retarded in the high concentration region and there is a trend to flatten, the highest determined concentration of Cr(VI) solution was set as 30 mg/mL. The Langmuir adsorption model can be used in this experimental [31], which represents the relationship between the equilibrium concentration of the solute (C e , mg/L) and the amount of methyl blue and Cr(VI) adsorbed at equilibrium (q e , mg/g). …”

Section: Adsorption Of Methyl Bluementioning

confidence: 99%

Hydrophobic Poly(ionic liquid) for Highly Effective Separation of Methyl Blue and Chromium Ions from Water

Jiang

Kong

2013

Polymers

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Abstract:The hydrophobic poly(ionic liquid) of poly(3-ethyl-1-vinylimidazolium bis(trifluoromethanesulfonyl)imide) (PVI-TFSI) containing imidazolium cations and bis(trifluoromethanesulfonyl)imide anions was synthesized for the separation of methyl blue and chromium ions [Cr(VI)] from water. The adsorption of methyl blue and Cr(VI) in PVI-TSFI/water system reached equilibrium stage within 60 min and 12 h, and the maximum adsorbed percentage for methyl blue and Cr(VI) was 97.6% and 98.0%, respectively. The adsorption regi me of either methyl blue or Cr(VI) for PVI-TFSI was in correspondence with the Langmuir adsorption model. The maximum adsorption capacity of PVI-TFSI for methyl blue and Cr(VI) was determined as 476.2 and 17.9 mg/g, respectively. The hydrophobic poly(ionic liquid) with a remarkable adsorbent capacity of methyl blue and Cr(VI) can be conveniently synthesized and shows potential in water treatment for the effective separation of organic dyes or heavy metal ions.

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“…Azo dyes are an interesting class of compounds that are widely applied in chemical applications and industries. Although azo dyes are not strongly toxic, they can cause hypersensitivity and allergy; therefore, the presence of these dyes in water is highly undesirable (Deligeer et al, 2011;Ling et al, 2016). Hence, disposal of untreated effluents to the surrounding environment often leads problems for aquatic life and humans.…”

Section: Introductionmentioning

confidence: 99%

“…Among various treatment methods, adsorption is quite a promising technique for the removal of dyes due to its high efficiency, ease of handling, availability of different adsorbents, and its cost efficiency. In this regard, various adsorbents have been developed for the separation and removal of different dyes including activated carbons (Ahmad and Hameed, 2010;Oliveira et al, 2011), magnetic nanocomposites (Deligeer et al, 2011;Jiang et al, 2014;You et al, 2014), zeolites (Akgu¨l, 2014;Herna´ndez-Montoya et al, 2013), mesoporous materials (Lee et al, 2007;Punyapalakul and Takizawa, 2006), clays (Liu and Zhang, 2007), natural or agro-industrial by-products (Al-Ghouti et al, 2010;Haris et al, 2010;Saad et al, 2010;Subbaiah and Kim, 2016;Yu et al, 2012), and so on. In recent years, agricultural or agro-industry by-products are widely used as efficient adsorbents for improving the contaminated water and wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Application of response surface methodology for optimization of methyl orange adsorption by Fe-grafting sugar beet bagasse

Ghorbani

Kamari

2016

Adsorption Science & Technology

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The adsorptive removal of methyl orange dye using a sugar beet bagasse (SBB) as agro-industrial by-product has been investigated. The adsorption potential of SBB was improved by grafting with FeCl 3 Á6H 2 O. The dependency of removal efficiency (R) and adsorption capacity (q e ) on the level and magnitude of variables including initial pH, methyl orange concentrations, and sorbent dosage was investigated and optimized by central composite design under response surface methodology (RSM). Besides, the effect of temperature on adsorption process was evaluated in terms of thermodynamic study. The good agreement found between observed and predicted values supports and confirms the suitability of the applied model to predict adsorption state. The applied models revealed that methyl orange removal in aqueous solution was affected by all the three factors studied. By consideration of seven starting points in the response surface solutions, the best local maximum was found to be at initial solution pH 2.51, sorbent dosage of 0.37 g.L À1 , initial dye concentration of 100 mg.L À1 , removal efficiency of 51.8%, adsorption capacity of 221.5 mg.g À1 , and desirability of 0.692. A pseudo second-order model more accurately represented the adsorption process. Moreover, Freundlich isotherm model was superior to the Langmuir isotherm model.

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Adsorption of methyl orange on mesoporous γ-Fe2O3/SiO2 nanocomposites

Cited by 86 publications

References 19 publications

Magnetic solid phase adsorption, preconcentration and determination of methyl orange in water samples using silica coated magnetic nanoparticles and central composite design

Magnetic solid phase adsorption, preconcentration and determination of methyl orange in water samples using silica coated magnetic nanoparticles and central composite design

Hydrophobic Poly(ionic liquid) for Highly Effective Separation of Methyl Blue and Chromium Ions from Water

Application of response surface methodology for optimization of methyl orange adsorption by Fe-grafting sugar beet bagasse

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