Adsorption of Congo red from aqueous solution onto calcium-rich fly ash

Acemioğlu, Bilal

doi:10.1016/j.jcis.2004.03.019

Cited by 316 publications

(171 citation statements)

References 33 publications

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“…... (7) ... (8) ... (9) where C e = any liquid phase concentration of the dye in equilibrium with the adsorbent, q e = equilibrium adsor ption capacity of the adsorbent, q m = monolayer capacity, q e = theoretical monolayer saturation capacity of adsorbent (mg/g), K L = Langmuir adsorption constant, K F = Freundlich constant for relative adsorption capacity of adsorbent, A T = Temkin isotherm equilibrium binding constant (L/g), B T = Temkin heat of adsorption 27 . Three isotherms Langmuir, Freundlich and Temkin were analysed using experimental data obtained from the adsorption of MG dye on EWBC.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Also, these dyes deteriorate the quality of water permanently, resulting in allergy, skin irritation, dermatitis, cancer, dysfunction of liver, reproductive system and kidneys in humans 5,6 . The dyes can contaminate both the surface and ground waters used for drinking and other purposes, strongly influence the photosynthetic activity of aquatic plants, and may result in oxygen deficiency in the aquatic flora and fauna due to anaerobic degradation into highly toxic substances 7,8,9 .…”

Section: Introductionmentioning

confidence: 99%

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Process Optimization Studies of Malachite Green dye Adsorption onto Eucalyptus (Eucalyptus globulus ) Wood Biochar using Response Surface Methodology

Singh¹,

Soni²,

Singh³

2016

Orient. J. Chem

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Biochar derived from Eucalyptus (Eucalyptus globulus) wood particles was utilized as an adsorbent to remove Malachite Green (MG) dye from an aqueous solution by varying the different physicochemical parameters. The adsorbent was characterized using FTIR analysis, SEM and XRD. The kinetics of the dye adsorption was analysed using pseudo-first-order and second-order model. The rate of sorption was described as a function of different experimental parameters and was modeled applying Box-Behnken Design (BBD). The results indicate that the response of MG adsorption was appreciably affected by the quadratic terms of contact time, dye concentration, temperature, pH, and adsorbent dose. The statistical analysis was carried out using ANOVA which shows a convincing relationship among the parameters under study.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Process Optimization Studies of Malachite Green dye Adsorption onto Eucalyptus (Eucalyptus globulus ) Wood Biochar using Response Surface Methodology

Singh¹,

Soni²,

Singh³

2016

Orient. J. Chem

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“…The Dubinin-Radushkevich(D-R) equation can be expressed (Acemioglu 2004) as, (9) where ε (the Polanyi potential) is equal to RT ln (1 + 1/C e ), q e is the amount of the dye adsorbed per unit activated carbon (mol/g), q m is the theoretical monolayer saturation capacity (mol/g), C e is the equilibrium concentration of the dye solution (mol/L), K is the constant of the adsorption energy (mol 2 /kJ 2 ), R is the gas constant (8.314 KJ/mol K), and T is the temperature (K). The linear form of the D-R isotherm is:…”

Section: Dubinin-radushkevich Isothermmentioning

confidence: 99%

Studies on the Removal of Cu(II) from Aqueous Solutions using Modified Acacia nilotica Leaf

Palanisamy¹,

Santhi²

2014

BioResources

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In this work, sustainable and biodegradable Acacia nilotica leaf (AN) was chemically modified to remove Cu(II) from aqueous solutions, which is considered a versatile approach to clean contaminated aquatic environments. Zinc chloride-modified Acacia nilotica leaf (ZAN) was characterized by scanning electron microscopy (SEM) and other physico-chemical parameters like pH ZPC . The aim was to assess the efficiency and mechanism of adsorption on Acacia nilotica via isotherm models (Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, HarkinJura, and Frenkel-Halsey-Hill), kinetic models, and thermodynamic parameters. To optimize the removal efficiency, parameters such as effect of initial concentration, effect of pH, dosage, initial concentration, and contact time were studied by batch and column methods. Desorption studies illustrated that about 73% of the metal ions could be removed using 0.2N HCl. The results of the present investigation indicated that ZAN has a high potential for the removal of Cu(II) from aqueous solutions, and the resultant data can serve as a base line for designing treatment plants on an industrial scale.

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“…The treatment of water contaminated with textile dyes has been the subject of several studies aimed at reducing the intensity of the colors and the quantity of organic matter [1]. There are many methods for removing dyes from wastewater such as flocculation, chemical coagulation, oxidation, precipitation and filtration [2][3][4][5][6]. Among these methods, adsorption is the most effective technique for the treatment of wastewater [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…There are many methods for removing dyes from wastewater such as flocculation, chemical coagulation, oxidation, precipitation and filtration [2][3][4][5][6]. Among these methods, adsorption is the most effective technique for the treatment of wastewater [5][6][7]. Many adsorbents have been tested to reduce dye concentrations from aqueous solutions such as activated carbon [8], adsorbents including agricultural waste [9,10], natural phosphate [11], chitosan [12], kaolinite [13], montmorillonite [14].…”

Section: Introductionmentioning

confidence: 99%

Study of the Adsorption of Bright Green by a Natural Clay and Modified

Ltifi¹,

Ayari²,

Db³

et al. 2016

J Material Sci Eng

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The adsorption of Bright Green (BG), a cationic dye, was studied by clay treatment experiments by modification with an aqueous solution of a cationic surfactant. Hexadecyltrimethylammonium bromide (HDTMA) and Cetylpyridinium chloride (CPC) were used for the modification of the clay. Clay modified HDTMA showed the greatest adsorption capacity compared to the other adsorbents studied. The adsorption of HDTMA on BG depended on the adsorbent dose, the pH of the solution, the contact time and the initial dye concentration studied.The adsorption data to correspond to the HDTMA experiments have been better described by the Langmuir isotherm model. The isothermal adsorption capacity of BG on HDTMA modified clay was found to be 45.5 mg/g (for an initial BG concentration of 50 mg/L), which is significantly higher than that of other adsorbents. The kinetics of adsorption of BG on clay modified by HDTMA has been described more precisely by the pseudo-second order kinetics model. The adsorbent was characterized by analysis of the Brunauer-Emmett-Teller surface (BET), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The BG adsorption mechanism on the surfactant-modified clay may comprise a hydrophobic interaction or van der Waals interaction or a combination of the two.

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Adsorption of Congo red from aqueous solution onto calcium-rich fly ash

Cited by 316 publications

References 33 publications

Process Optimization Studies of Malachite Green dye Adsorption onto Eucalyptus (Eucalyptus globulus ) Wood Biochar using Response Surface Methodology

Process Optimization Studies of Malachite Green dye Adsorption onto Eucalyptus (Eucalyptus globulus ) Wood Biochar using Response Surface Methodology

Studies on the Removal of Cu(II) from Aqueous Solutions using Modified Acacia nilotica Leaf

Study of the Adsorption of Bright Green by a Natural Clay and Modified

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