Adsorptive removal of cationic (BY2) dye from aqueous solutions onto Turkish clay: Isotherm, kinetic, and thermodynamic analysis

Sözüdoğru, Onur; Fìl, Baybars Ali; Boncukçuoğlu, Recep; Aladağ, Erdinç; Kul, Sinan

doi:10.1080/02726351.2015.1052121

Cited by 24 publications

(8 citation statements)

References 33 publications

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“…For this, using the amount of bentonite (0. were studied. The reason for working in wide pH ranges and the wide temperature is that solutions consisting of clay and dyestuff give high pH [17][18][19] or low pH [20][21][22] value. The reason for working in wide temperature ranges is the thermal stability in the solution and the changes that may occur in the structural hydroxyl groups [23].…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Removal of Maxilon Golden Yellow GL EC 400% from the Wastewater by Adsorption Method Using Different Clays

Durak

2020

Sakarya University Journal of Science

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This study was to evaluate the adsorption capability of clay minerals of halloysite, bentonite, kaolinite, and natural clay (obtained from the Avanos) to remove Maxilon Golden Yellow GL EC 400% (MGY400) from aqueous solution. Different amounts of adsorbents (0.5, 1.0, 1.5 and 2.0 g.) were taken from the samples and obtained the most dye-removal clay material and adsorbent amount were found according to the results. Adsorption was applied on all clays at 25 o C temperature, 200 rpm mixing speed and different contact times (2, 5, 10, 20, 30, 40, 50, 60 min) in the batch reactor. Bentonite provided the highest dyestuff removal. Therefore, the second phase adsorption was continued with bentonite. The adsorption with bentonite were performed at different temperature (13 o C, 25 o C, 50 o C) and pH values (2, 4, 6, 8, 10, 12). When the pH was 12 and the temperature was 25 o C, it was determined that the removal rate of the dyestuff of bentonite reached up to 99.7%. According to the results, adsorption kinetics and isotherms were investigated, and evaluation was made for working conditions.

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Section: Adsorption Experimentsmentioning

confidence: 99%

Removal of Maxilon Golden Yellow GL EC 400% from the Wastewater by Adsorption Method Using Different Clays

Durak

2020

Sakarya University Journal of Science

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“…Langmuir Freundlich eters are the indicators for practical application of a process. These parameters are obtained from the experimental data acquired at different temperatures [74] and evaluated by calculating the Gibbs free energy variation (G°), enthalpy variation (H°) and entropy (S°) according to Eq. (8) [75,76]:…”

Section: Adsorbentsmentioning

confidence: 99%

Comparative investigation of indigo blue dye removal efficiency of activated carbon and natural clay in adsorption/ultrafiltration system

Missaoui¹,

Tahri²,

Daramola³

et al. 2019

Desalination and Water Treatment

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In the present study, indigo blue dye removal efficiency of activated carbon (AC) and natural clay (NC) was evaluated and compared, firstly in an adsorption unit, and then in an adsorption coupling ultrafiltration (A/UF) system. Effect of operating variables like pH, contact time, adsorbent dosage, initial dyes concentration during the adsorption was investigated and consequently optimised. The optimal conditions were employed for the adsorbents during the removal of the dye in the A/UF system. The optimal amount of NC and AC was 0.4 g/L and 0.3 g/L, respectively, and NC and AC displayed adsorption capacity of 57 mg/g and 53 mg/g, respectively, at this condition. Application of UF reveals a decrease of membrane fouling for both adsorbents in A/UF system. In addition, colour retention, when the adsorbents were used in A/UF, increased significantly from 90.5% to 99% as compared to using adsorption only. The efficiency of the membrane regeneration was estimated by the determination of the water permeability after rinsing. It is noteworthy to mention that a total regeneration of the membrane after the application of continous hybrid A/UF was achieved, however, the use of UF alone exhibited a fouling decrease by 40%.

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“…Two kinetics models, namely, pseudo-first-order and pseudo-second-order (34), were employed to evaluate the adsorption of OG on CS/DM membranes. The pseudo-firstorder equation is stated as:…”

Section: Adsorption Kinetics Modelsmentioning

confidence: 99%

Characterization and adsorption performance of chitosan/diatomite membranes for Orange G removal

Wang

Cao

2016

E-Polymers

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Novel chitosan/diatomite (CS/DM) membranes were prepared by phase inversion technique to remove anionic azo dyes from wastewater. The fabricated composite membranes exhibited the combined advantages of inorganic substances, diatomites, and polysaccharides. These composite membranes were characterized through Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction analysis. The mechanical properties of the membranes were also evaluated. Adsorption experiments were conducted under varied initial dye concentration, solution pH values, contact time, and adsorbent dosage. The results indicate that pH 3 is the optimal pH value for Orange G adsorption. The CS/DM membranes exhibit the highest adsorption capacity of 588 mg g -1 and removal rate of 94% under an initial dye concentration of 200 mg l -1 , contact time of 6 h, and membrane dosage of 8 mg. Langmuir, Freundlich and Redlich-Peterson adsorption models were applied to describe the equilibrium isotherms at different dye concentrations. The equilibrium data was found to be fitted well to the Redlich-Peterson isotherm. Pseudo-first-order and pseudo-second-order kinetics models were used to describe the adsorption of membranes. The adsorption data were well explained by pseudo-secondorder models, and also followed by the Elovich model. In addition, these membranes display high adsorption capacity and mechanical performance even after reused for seven times.

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Adsorptive removal of cationic (BY2) dye from aqueous solutions onto Turkish clay: Isotherm, kinetic, and thermodynamic analysis

Cited by 24 publications

References 33 publications

Removal of Maxilon Golden Yellow GL EC 400% from the Wastewater by Adsorption Method Using Different Clays

Removal of Maxilon Golden Yellow GL EC 400% from the Wastewater by Adsorption Method Using Different Clays

Comparative investigation of indigo blue dye removal efficiency of activated carbon and natural clay in adsorption/ultrafiltration system

Characterization and adsorption performance of chitosan/diatomite membranes for Orange G removal

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