Adsorption of anthraquinone dye onto eco-friendly semi-IPN biocomposite hydrogel: Equilibrium isotherms, kinetic studies and optimization

Oladipo, Akeem Adeyemi; Gazi, Mustafa; Saber-Samandari, Samaneh

doi:10.1016/j.jtice.2013.07.013

Cited by 94 publications

(46 citation statements)

References 45 publications

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“…It can be concluded that CuFe 2 O 4 nanoparticles have been successfully integrated with FC. There are no substantial changes in the AR25-FC and AR25-loaded MFC spectra compared to FC and MFC indicating that the mechanism of the biosorption may be physisorption [4,26].…”

Section: Characterization Of Biosorbentmentioning

confidence: 91%

“…Isotherms analysis is significant for evaluating equilibrium data and describing the interactive influences between the biosorbent and the adsorbate [4,[26][27][28][29]. Four widely used isothermal equations were applied to model the biosorption equilibrium data.…”

Section: Biosorption Isothermmentioning

confidence: 99%

“…The pH zpc of FC and MFC were determined as described elsewhere by pH drift method [4,26]. Twenty milligrams of the samples were mixed with known pH of 0.01 mol/L NaOH and N 2 gas was bubbled into the suspension for 3 h. The pH of the samples was adjusted between 1 and 12 under N 2 for 24 h. The final pH was determined and plotted against the initial pH, the pH zpc was obtained when pH final =pH initial .…”

Section: Characterization Of Biosorbentmentioning

confidence: 99%

“…Yearly, tons of heavily colored wastewater are released from various sources including leather, printing, textile, plastic and dye factories [1][2][3][4][5][6]. It is highly important to treat the colored hazardous effluents as they serve as threat to human beings and aquatic species.…”

Section: Introductionmentioning

confidence: 99%

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Two-stage batch sorber design and optimization of biosorption conditions by Taguchi methodology for the removal of acid red 25 onto magnetic biomass

Oladipo

Gazi²

2015

Korean J. Chem. Eng.

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Biomagnetic material (MFC) was synthesized via simple co-precipitation and used as biosorbent for the removal of acid red 25 (AR25) under optimized conditions. The characteristics of MFC were studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM), Boehm titration and scanning electron microscopy (SEM). Optimum removal of AR25 was achieved at pH=5.0. The equilibrium data were well described by the Sips and Freundlich models. Taguchi methodology was employed to optimize the biosorption experiments. 411.56 mg/g and 96.8% were obtained as the biosorption capacity and removal efficiency, respectively, at the optimum conditions of ionic strength (0.5 M), influent volume (300 L) and MFC dosage (4 g). The contact time for removal of 96% AR25 in two-stage batch system is 400.8 min which is lower than the single-stage treatment process (895 min).

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Section: Characterization Of Biosorbentmentioning

confidence: 91%

Section: Biosorption Isothermmentioning

confidence: 99%

Section: Characterization Of Biosorbentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-stage batch sorber design and optimization of biosorption conditions by Taguchi methodology for the removal of acid red 25 onto magnetic biomass

Oladipo

Gazi²

2015

Korean J. Chem. Eng.

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“…The FTIR spectroscopic characteristics are shown in Table 3. The bands around 3,400 cm −1 indicated the presence of bonded -OH groups [14,25]. The bands observed at about 2,920-2,850 cm −1 could be assigned to the aliphatic C-H group [26].…”

Section: Characterizations Of Astmentioning

confidence: 94%

Optimization of cationic dye adsorption on activated spent tea: Equilibrium, kinetics, thermodynamic and artificial neural network modeling

Babaei

Khataee

Ahmadpour

et al. 2015

Korean J. Chem. Eng.

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Activated spent tea (AST) was prepared and characterized by using different techniques such as BET, FTIR and SEM. It is used for methylene blue (MB) dye removal from aqueous solution in a batch system. Experimental results showed that natural basic pH, increased initial dye concentration, and high temperature favored the adsorption. Analysis based on the artificial neural network (ANN) indicated that the adsorbent dose and time with the relative importance of 30.03 and 35.44%, respectively, appeared to be the most influential parameters in the MB adsorption. The adsorption of MB was relatively fast and the Avrami fractional order and pseudo-second-order kinetic models showed satisfactory fit with the experimental data. The equilibrium data were well fitted by the Langmuir and Liu isotherm models, with a maximum sorption capacity of 104.2 mg/g. Also, the obtained values of thermodynamic parameters showed that the adsorption of MB onto AST is endothermic and spontaneous. The results of this study indicated that AST was a reliable adsorbent for removing cationic dyes from wastewater.

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The adsorption behaviors of the multiple stimulus‐responsive poly(ethylene glycol)‐based hydrogels for removal of RhB dye

Yuan

Wang

Han

et al. 2015

J of Applied Polymer Sci

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In this article, the multiple stimulus-responsive organic/inorganic hybrid hydrogels by combining poly(2-(2-methoxyethoxy) ethyl methacrylate-co-oligo (ethylene glycol) methacrylate-co-acrylic acid) (PMOA) hydrogel with magnetic attapulgite/Fe 3 O 4 (AT-Fe 3 O 4 ) nanoparticles were applied to the removal of Rhodamine B (RhB) dye from wastewater. The adsorption of RhB by the hydrogels was carried out under different external environmental, such as pH, temperature and magnetic-field. The results showed that the hydrogels still possessed temperature, pH and magnetic-field sensitivity during the adsorption process, which indicated that the adsorption could be controlled by the hydrogels responsive. The dye adsorption had a significant increment at 30 C and the removal of RhB could reach to over 95%. Besides, the low pH values were also favorable for the RhB adsorption, the removal was over 90% at pH 5 4.56. Kinetic studies showed that the pseudo-second order kinetic model well fitted the experimental data. The rate constant of adsorption was 0.0379 g/mg min. Langmuir and Freundlich isotherm models were applied to the equilibrium adsorption for describing the interaction between sorbent and adsorbate. The maximum K L and K F were 2.23 (L/g) and 0.87 (mg/g) at 30 C, respectively. Under the external magnetic-field, the adsorption rate significantly increased within 250 min and the hydrogels could be separated easily from wastewater.

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Adsorption of anthraquinone dye onto eco-friendly semi-IPN biocomposite hydrogel: Equilibrium isotherms, kinetic studies and optimization

Cited by 94 publications

References 45 publications

Two-stage batch sorber design and optimization of biosorption conditions by Taguchi methodology for the removal of acid red 25 onto magnetic biomass

Two-stage batch sorber design and optimization of biosorption conditions by Taguchi methodology for the removal of acid red 25 onto magnetic biomass

Optimization of cationic dye adsorption on activated spent tea: Equilibrium, kinetics, thermodynamic and artificial neural network modeling

The adsorption behaviors of the multiple stimulus‐responsive poly(ethylene glycol)‐based hydrogels for removal of RhB dye

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