Adsorption of basic dyes from aqueous solution onto pumice powder

Akbal, Feryal

doi:10.1016/j.jcis.2005.01.036

Cited by 92 publications

(30 citation statements)

References 17 publications

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“…The isotherms of MB on MPS were found to be linear for the entire concentration range studies and the correlation coefficients were extremely high (R 2 > 0.99) as shown in Table 3. As Table 3 shows, the maximum adsorption capacity of the MPS in the Langmuir model was obtained as 15.87 mg/g which is considered as a favorable rate compared to other similar studies (Table 4) (29)(30)(31)(32). The Freundlich isotherm (33) is derived by assuming a heterogeneous surface with a non-uniform distribution of sorption heat over the surface.…”

Section: Dubinin-radushkevichmentioning

confidence: 70%

Adsorption of Methylene Blue Dye from Aqueous Solutions by Modified Pumice Stone: Kinetics and Equilibrium Studies

et al. 2013

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Background: Dyes are one of the most important industrial pollutants, especially in textile industries. Many methods have been proposed in order to remove color from wastewater among which, adsorption is more acceptable due to the ability for its use in the large scale. Objectives: The objective of this study was to investigate pumice as an inexpensive adsorbent for removal of Methylene Blue from aqueous solutions. Materials and Methods:In this work the Modified Pumice Stone has been applied for removal of the Methylene Blue dye from aqueous environments. The effect of pH, contact time, initial concentration and amount of adsorbent were considered. In order to investigate the mechanism of the adsorption process, several kinetic models including pseudo-first order, pseudo-second order and intra-particle diffusion were used. In addition, equilibrium data was fitted on to Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models. Results: Results showed that the adsorption of the Methylene Blue was enhanced with increasing initial dye concentration, pH and contact time. The optimum pH was 10. The q max for adsorption of methylene blue dye from the Langmuir model was 15.87 mg/g. Considering the values of R 2 (0.999) and χ 2 , Freundlich isotherm model and pseudo-second order kinetic model had the best fitness. Conclusions:This study has demonstrated that the modified Pumice stone with HCl can be employed as effective and inexpensive adsorbent for the removal of Methylene Blue from aqueous environments.

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Section: Dubinin-radushkevichmentioning

confidence: 70%

Adsorption of Methylene Blue Dye from Aqueous Solutions by Modified Pumice Stone: Kinetics and Equilibrium Studies

et al. 2013

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“…Among these techniques, adsorption seems to be one of the economical and the most effective methods because of simple operation and easy handling (Akbal 2005, Khosravi et al 2014, Pirsaheb et al 2014. Adsorption is the most versatile process and widely used for the pollutants removal from wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Response surface methodology (RSM) and its application for optimization of ammonium ions removal from aqueous solutions by pumice as a natural and low cost adsorbent

Moradi¹,

Fazlzadeh²,

Pirsaheb³

et al. 2016

Archives of Environmental Protection

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This research was conducted to study the adsorption of ammonium ions onto pumice as a natural and low-cost adsorbent. The physico-chemical properties of the pumice granular were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Modeling and optimization of a NH 4 + sorption process was accomplished by varying four independent parameters (pumice dosage, initial ammonium ion concentration, mixing rate and contact time) using a central composite design (CCD) under response surface methodology (RSM). The optimum conditions for maximum removal of NH 4 + (70.3%) were found to be 100 g, 20 mg/l, 300 rpm and 180 min, for pumice dosage, initial NH 4 + ion concentration, mixing rate and contact time. It was found that the NH 4 + adsorption on the pumice granular was dependent on adsorbent dosage and initial ammonium ion concentration. NH 4 + was increased due to decrease the initial concentration of NH 4 and increase the contact time, mixing rate and amount of adsorbent.

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“…For a long time activated carbon was considered as an effective adsorbent but the high cost of activated carbon has stimulated interest in examining the feasibility of using cheaper waste materials as potential adsorbents. Thus materials like beech sawdust [6], silkworm pupa [7], waste apricot [8], natural zeolite [9], Leacril fabric [10], pumice powder [11], and agricultural wastes [12] have been utilized for removal of water-soluble toxic dying materials from contaminated water. Recent significant contributions have been made by Wang and co-workers by developing coal ash, fly ash, red mud, etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of carmoisine A from wastewater using waste materials—Bottom ash and deoiled soya

Gupta

Mittal

Malviya

et al. 2009

Journal of Colloid and Interface Science

292

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a b s t r a c tThe present study deals with the application of bottom ash, a power plant waste, and deoiled soya, an agricultural waste, for the adsorptive removal of carmoisine A dye from its aqueous solutions. This paper incorporates a comparative study of the adsorption characteristics of the dye on these effective adsorbents along with effects of time, temperature, concentration, and pH. Analytical techniques have been employed to find pore properties and characteristics of adsorbent materials. Batch adsorption studies, kinetic studies, and column operations have also been performed to understand the dye extraction ability of the adsorbents. The adsorption behavior of the dye has been studied using Freundlich, Langmuir, Tempkin, and Dubinin-Radushkevich adsorption isotherm models. The monolayer adsorption capacity determined from the Langmuir adsorption equation has been found as 1.78 Â 10 À5 and 5.62 Â 10 À5 mol g À1 at 323 K for bottom ash and deoiled soya, respectively. Kinetic measurements suggest the involvement of pseudo-second-order kinetics in both adsorptions and each case is controlled by a particle diffusion process. Column experiments demonstrated that both adsorbents could be practically utilized in elimination of hazardous dye from effluent and dye material can be recovered by eluting NaOH through the exhausted columns.

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Adsorption of basic dyes from aqueous solution onto pumice powder

Cited by 92 publications

References 17 publications

Adsorption of Methylene Blue Dye from Aqueous Solutions by Modified Pumice Stone: Kinetics and Equilibrium Studies

Adsorption of Methylene Blue Dye from Aqueous Solutions by Modified Pumice Stone: Kinetics and Equilibrium Studies

Response surface methodology (RSM) and its application for optimization of ammonium ions removal from aqueous solutions by pumice as a natural and low cost adsorbent

Adsorption of carmoisine A from wastewater using waste materials—Bottom ash and deoiled soya

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