Enhanced removal of crystal violet by low cost alginate/acid activated bentonite composite beads: Optimization and modelling using non-linear regression technique

Oladipo, Akeem Adeyemi; Gazi, Mustafa

doi:10.1016/j.jwpe.2014.04.007

Cited by 181 publications

(70 citation statements)

References 58 publications

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“…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%

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: Biosorption Isothermmentioning

confidence: 99%

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 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]. As shown in Fig.…”

Section: Characterizations Of Astmentioning

confidence: 82%

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 Freundlich isotherm takes heterogeneous systems into account and is not restricted by a monolayer [10]. It is described by: (4) or in linearised form:…”

Section: ) Isotherm Modelingmentioning

confidence: 99%

“…Montmorillonite is composed of a central sheet of octahedral aluminium ions between two tetrahedral sheets of silicone ions, where these sheets are linked with oxygen atoms. The substitution of Al 3+ by Si 4+ within the tetrahedral sheet, and Mg 2+ by Al 3+ in the octahedral sheet is the attribute to the net negative charge on the clay [10]. Bentonite clay behaves as a flocculent in the adsorption of particles, during ion exchange and in the coagulation-flocculation process [11].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Adsorption Capacity of Sweet Sorghum Derived Biochar towards Malachite Green Dye Using Bentonite Clay

2016

International Conference on Advances in Science, Engineering, Technology and Natural Resources (ICASETNR-16) Nov. 24-25, 2016 P

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Abstract-The enhanced adsorption capacity of modified sweet sorghum derived biochar using bentonite clay was prepared and systematically studied for its adsorption behaviour towards the removal of cationic dye namely malachite green (MG). A clay biochar composite was prepared by combining clay and biochar in a ratio of 1:5. The composite showed an improvement in the adsorption capacity for the removal of the dye compared to the biochar. The kinetic studies revealed that the adsorption fits both pseudo-first-order and pseudo-second-order kinetic models which indicates both physisorption and chemisorption mechanisms for the interaction between adsorbent and adsorbate molecules. The adsorption isotherm indicated that the Freundlich model best describes the adsorption mechanism.

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Enhanced removal of crystal violet by low cost alginate/acid activated bentonite composite beads: Optimization and modelling using non-linear regression technique

Cited by 181 publications

References 58 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

Enhanced Adsorption Capacity of Sweet Sorghum Derived Biochar towards Malachite Green Dye Using Bentonite Clay

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