Kinetic and Equilibrium Studies on the Adsorption of Crystal Violet Dye using Kaolin as an Adsorbent

Nandi, Barun Kumar; Goswami, A.; Das, Ajoy Kumar; Mondal, Biplab; Purkait, Mihir Kumar

doi:10.1080/01496390701885331

Cited by 112 publications

(45 citation statements)

References 19 publications

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“…Thus, 0.05 g of baryte was selected as the optimum adsorbent dosage. The decrease in qe value may be due to the splitting effect of the flux (concentration gradient) between adsorbate and adsorbent with increasing adsorbent concentration, causing a decrease in the amount of dye adsorbed per unit weight of adsorbent [25]. Figure 1 shows the effect of initial Rhodamine B solution pH on the dye uptake capacity (mg/g) at equilibrium.…”

Section: Effect Of Adsorbent Quantitymentioning

confidence: 96%

Adsorption Characteristics of Rhodamine B from Aqueous Solution onto Baryte

Vijayakumar

Elango

Dharmendirakumar³

2010

CLEAN Soil Air Water

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Batch sorption experiments were carried out for the adsorption of the basic dye Rhodamine B from aqueous solution using baryte as the adsorbent. The effect of adsorbent dosage, temperature, initial dye concentration and pH were studied. Adsorption data were modeled using first and second order kinetic equations and the intra particle diffusion model. Kinetic studies showed that the adsorption process followed second order rate kinetics with an average rate constant of 0.05458 g mg -1 min -1 . Dye adsorption equilibrium was attained rapidly after 30 min of contact time. The equilibrium data was fitted to the Langmuir, Freundlich and Tempkin isotherms over a dye concentration range of 50 -250 mg/L. The adsorption thermodynamic parameters showed that adsorption was an exothermic, spontaneous and less ordered arrangement process. The adsorbent, baryte, was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The results showed that baryte has good potential for the removal of Rhodamine B from dilute aqueous solution.

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Section: Effect Of Adsorbent Quantitymentioning

confidence: 96%

Adsorption Characteristics of Rhodamine B from Aqueous Solution onto Baryte

Vijayakumar

Elango

Dharmendirakumar³

2010

CLEAN Soil Air Water

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“…So, a 0.1 g/50 mL adsorbent dosage was taken as the optimum value for experiments. The percentage of dye removal increased with an increase in the adsorbent dosage because at higher dosages of perlite, there is a very fast superficial adsorption onto the perlite surface that produces a lower solute concentration in the solution [15].…”

Section: Effect Of Adsorbent Dosementioning

confidence: 99%

Removal of Congo Red from Aqueous Solutions by Perlite

Vijayakumar

Dharmendirakumar²,

Renganathan

et al. 2009

CLEAN Soil Air Water

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The removal of Congo red dye from an aqueous solution using perlite, a volcanic siliceous rock, as a low cost adsorbent was studied. Adsorption experiments were carried out as batch studies at different adsorbent dose, pH, temperature and initial dye concentration. The dye adsorption equilibrium was rapidly attained after 40 min of contact time. The adsorbent was characterized by Fourier Transform Infrared spectroscopy (FTIR), X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). Langmuir and Freundlich isotherms were studied for the adsorption data over a concentration range of 20 to 100 mg/L. The thermodynamic parameters such as entropy of adsorption (DS 0 ), enthalpy of adsorption (DH 0 ) and Gibbs free energy of adsorption (DG 0 ) were obtained and analyzed. Kinetic studies showed that the adsorption process obeyed the pseudo first order kinetic model. The dimensionless separation factors (R L ) showed that perlite could be used to remove Congo red from an aqueous solution.

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“…Certain waste products from industrial and agricultural operations, natural materials and biosorbents represent potentially economical alternative sorbents. Many of them have been tested and proposed for dye removal (Babu et al, 2007;Allen & Koumanova, 2005;Rafatullah et al, 2010;Nandi et al, 2008).…”

mentioning

confidence: 99%

Biosorption Studies of Methylene Blue by Mediterranean Algae Carolina and Its Chemically Modified Forms. Linear and Nonlinear Models' Prediction Based on Statistical Error Calculation

Hammud¹,

Fayoumi²,

Holail³

et al. 2011

IJC

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Biosorption experiments were carried out for the removal of the cationic dye Methylene Blue from its aqueous solution by the brown algae Carolina which is widely distributed in the Mediterranean Sea at Lebanese coast. Langmuir, Freundlich, Redlich-Peterson, Temkin, Elovich, and Dubinin-Radushkevich isotherm models were also investigated. The results showed that the experimental adsorption data were well represented by the Langmuir model for the linear regression analysis and both Langmuir and Redlich-Peterson isotherm models for the non-linear regression analysis. The maximum adsorption capacity q max based on Langmuir is 55 mg/g at 19 ℃. This confirms the monolayer coverage of Methylene Blue dye onto energetically homogenous Carolina surface. Negative values of Gibbs free energy revealed that adsorption process is spontaneous.Carolina algae was chemically modified by treatment with NaOH, CaCl 2 or formaldehyde. The biosorption of Methylene Blue was enhanced with the process of cross linking using formaldehyde with q max of 64 mg/g. The results of isothermal study using modified algae also showed that the experimental adsorption data is well fitted into Langmuir model.

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Kinetic and Equilibrium Studies on the Adsorption of Crystal Violet Dye using Kaolin as an Adsorbent

Cited by 112 publications

References 19 publications

Adsorption Characteristics of Rhodamine B from Aqueous Solution onto Baryte

Adsorption Characteristics of Rhodamine B from Aqueous Solution onto Baryte

Removal of Congo Red from Aqueous Solutions by Perlite

Biosorption Studies of Methylene Blue by Mediterranean Algae Carolina and Its Chemically Modified Forms. Linear and Nonlinear Models' Prediction Based on Statistical Error Calculation

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