Equilibrium, kinetic and thermodynamic studies of the biosorption of textile dye (Reactive Red 195) onto Pinus sylvestris L.

Aksakal, Özkan; Ucun, Handan

doi:10.1016/j.jhazmat.2010.05.064

Cited by 236 publications

(104 citation statements)

References 31 publications

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“…The positive correlation between adsorbent dose and phenol removal may be related to an increase in the adsorbent surface area and availability of more adsorption sites as reported in previous studies [29]. Furthermore it was seen that beyond a dosage of 12.5 g L -1 , a decreasing trend was observed which might have resulted from the absence of adsorption sites due to aggregation of adsorbent particles [31]. …”

Section: Effect Of Adsorbent Dosesupporting

confidence: 71%

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Phenol Adsorption onto Various Soil Composite Membranes: Insight into Process Kinetics, Modelling and Optimisation Using Response Surface Methodology

Goswami¹

2015

Hydrol Current Res

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Section: Effect Of Adsorbent Dosesupporting

confidence: 71%

“…The residual phenol concentration was seen to decrease with a corresponding increase in adsorbent dose and contact time. This may have occurred due to an increase in adsorbent surface area bearing more adsorption sites [29,31].…”

Section: Effect Of Variation In Adsorbent Dosage and Timementioning

confidence: 99%

Phenol Adsorption onto Various Soil Composite Membranes: Insight into Process Kinetics, Modelling and Optimisation Using Response Surface Methodology

Goswami¹

2015

Hydrol Current Res

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“…Various research works have been undertaken for the removal of different pollutants using a large number of materials as adsorbents [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] . The advantage and disadvantage of adsorption techniques have been extensively reviewed by Lorenc et al…”

Section: Introductionmentioning

confidence: 99%

Modeling of experimental data for the adsorption of methyl orange from aqueous solution using a low cost activated carbon prepared from Prosopis juliflora

Kumar

Tamilarasan

2013

Polish Journal of Chemical Technology

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This paper presents the feasibility for the removal of methyl orange (MO) dye from aqueous solution using an activated carbon prepared from Prosopis julifl ora bark. Batch adsorption experiments were carried out as a function of pH, contact time, adsorbate concentration, adsorbent dosage and temperature. The commonly applicable isotherms namely Freundlich and Langmuir equations are used for the prediction of isotherm parameters. A comparison of linear least-square method and a trial-and-error non-linear method are examined in Freundlich and Langmuir (Four forms) isotherms. The nature of adsorption isotherm feasibility was evaluated with dimensionless separation factors (R L ). The dynamics of adsorption process was analyzed with Lagergren's Pseudo-fi rst order and Pseudo-second order kinetic equations. Thermodynamic parameters like the change in enthalpy (∆H o ), change in entropy (∆S o ) and change in Gibbs free energy (∆G o ) were evaluated and ΔG o shows a negative value whereas ΔH o shows the positive value indicating that the adsorption process was spontaneous and endothermic in nature. The functional group characterization of the adsorbent was done using Fourier transform infrared spectroscopy (FTIR). The thermal stability of activated carbon was analyzed using Thermo gravimetric analysis (TGA) and Differential thermal analysis (DTA).

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“…The mean increased from 22.10 to 48.62 mg/g with an increase in dye concentration. Increased biosorption at higher concentration of RO 13 dye can be attributed to a combination of factors, i.e., increase in the driving force of the concentration gradient of the dye resulting in higher probability of collision between dye ions and the active sites on the biomass, and availability of functional groups on the surface of the biomass surrounded by a greater number of RO 13 ions leading to increased ability to bind dye ions [28][29][30]. Figure 1 also shows the adsorption of RO 13 as a function of biosorbent dosage.…”

Section: Resultsmentioning

confidence: 99%

Statistical optimization of biosorption of Reactive Orange 13 by dead biomass of Rhizopus arrhizus NCIM 997 using response surface methodology

Saraf¹,

Vaidya²

2015

Int J Ind Chem

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Background Increasing environmental awareness is forcing waste creators to consider new options such as biosorption for the disposal of colored wastewaters. Due to prohibitive costs of commercially available activated carbon, low-cost biosorbents with high adsorption capacities have gained increasing attention. The present investigation deals with utilization of a low-cost, fungal biosorbent of Rhizopus arrhizus NCIM 997 and optimization of conditions for the removal of Reactive Orange 13 dye from an aqueous solution using sequential statistically designed experiments.Results Plackett-Burman design with six independent variables (pH, temperature, biosorbent dosage, dye concentration, contact time and speed of agitation) was used to identify the most important factors influencing dye biosorption. Path of steepest ascent and central composite design were used to move toward the vicinity of the optimum operating conditions and to determine the optimum levels of the variables, respectively. The maximum biosorption capacity (133.63 mg/g) was obtained under the following conditions: pH 2.0, dye concentration 114 mg/L, biosorbent dosage 0.8 g/L and speed of agitation 85 rpm. Validation experiments and application of artificial neural network showed excellent correlation between predicted and experimental values. Conclusions Response surface methodology using central composite design was employed at the specified combinations of four independent significant factors identified by Plackett-Burman design. The fitted model was used to arrive at the best operating conditions to achieve a maximum response. Sequential optimization was successfully used to increase biosorption by 49.04 %. The study indicated that the fungal biosorbent was an effective and economical alternative for the removal of Reactive Orange 13 dye.

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Equilibrium, kinetic and thermodynamic studies of the biosorption of textile dye (Reactive Red 195) onto Pinus sylvestris L.

Cited by 236 publications

References 31 publications

Phenol Adsorption onto Various Soil Composite Membranes: Insight into Process Kinetics, Modelling and Optimisation Using Response Surface Methodology

Phenol Adsorption onto Various Soil Composite Membranes: Insight into Process Kinetics, Modelling and Optimisation Using Response Surface Methodology

Modeling of experimental data for the adsorption of methyl orange from aqueous solution using a low cost activated carbon prepared from Prosopis juliflora

Statistical optimization of biosorption of Reactive Orange 13 by dead biomass of Rhizopus arrhizus NCIM 997 using response surface methodology

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