Adsorption of basic dye from aqueous solution onto fly ash

Lin, Jianwei; Zhan, Shu Lin; Fang, Mengxiang; Qian, Xiang‐Yang; Yang, Hao

doi:10.1016/j.jenvman.2007.01.001

Cited by 166 publications

(63 citation statements)

References 30 publications

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“…Also, dyes can be effectively removed by an adsorption process in which dissolved dye compounds attach themselves to the surface of adsorbents. Various adsorbents such as: activated carbon (Khaled et al, 2009;Bangash and Alam, 2009;Schimmel et al, 2010), flay ash (Lin et al, 2008), sawdust (Bello et al, 2010), lignite (Pentari et al, 2009), bentonite (Bulut et al, 2008), sepiolite (Dogan et al, 2007), montmorillonite , polymers (Kim and Guiochon, 2005), resin (Coşkun, 2011), zeolite (Mesko et al, 2001), macroporous hydrogel (Li et al, 2010), orange peel (Mafra et al, 2013), chitosan (Piccin et al, 2011), etc. have been widely studied for dye removal from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Fìl

Yılmaz

Bayar

et al. 2014

Braz. J. Chem. Eng.

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-In this study, color removal by absorption from synthetically prepared wastewater was investigated using montmorillonite clay by adsorption. As dyestuff Astrazon Red Violet 3RN (Basic Violet 16) was used. Experimental parameters selected were pH, temperature, agitation speed, initial dyestuff concentration, adsorbent dosage and ionic strength. It was established that adsorption rate increased with increasing pH, temperature, dye concentration and agitation speed, but decreased with increased ionic strength and adsorbent dosage. Adsorption equilibrium data obtained by a series of experiments carried out in a water bath were employed with common isotherm equations such as Langmuir, Freundlich, Temkin, Elovich and Dubinin-Radushkevich. It was found that the Langmuir equation appears to fit the equilibrium data better than the other models. Furthermore, the fit of the kinetic data to common kinetic models such as the pseudofirst-order, second-order, Elovich and intraparticle diffusion models was tested to elucidate the adsorption mechanism. Kinetic data conformed to the pseudo-second-order model, indicating chemisorptions. In addition, the thermodynamic parameters activation energy, Ea, enthalpy ΔH*, entropy, ΔS*, and free energy change, ΔG*, were calculated. The values of the calculated parameters indicated that physical adsorption of ARV on the clay was dominant and that the adsorption process was endothermic.

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Section: Introductionmentioning

confidence: 99%

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Fìl

Yılmaz

Bayar

et al. 2014

Braz. J. Chem. Eng.

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“…The adsorption standard free energy changes (ΔG°) are determined with the following equation (Alpat et al, 2008;Lin et al, 2008),…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

Equilibrium and kinetic adsorption study of aqueous basic dye solutions using waste foundry sand

Gürkan

Çoruh

2017

IJGW

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Abstract:The aim of this study is to evaluate adsorption kinetics, isotherms and thermodynamic parameters of crystal violet (CV) and methylene blue (MB) dyes from aqueous solution using waste foundry sand. Adsorption studies were carried out at different initial dye concentrations (12.5 -400 mg l -1 ), contact time (5 -240 min), pH (3.0 -9.0), sorbent doses (0.125 -2 g l -1 ) and adsorption temperature (20°C -70°C). The equilibrium adsorption data were analysed by Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) adsorption isotherm models. Of the four adsorption isotherms, the R 2 value of Langmuir isotherm model for MB and CV were 0.969 and 0.926, respectively. Experimental data were analysed using the pseudo-first order, the pseudo-second order, intraparticle diffusion and Elovich models. The characteristic parameters for each model have been determined. In addition, the equilibrium thermodynamic parameters, including changes in Gibbs free energy, entropy and enthalpy are determined for the CV and MB on waste foundry sand.

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“…Figure 4 also showed that the equilibrium adsorption capacity increased from 37.38 to 63.15 mg/g with the increase of initial MB concentration from 10 to 20 mg/l. When the initial concentrations increased, the mass transfer-driving force became larger and the interaction between MB and adsorbent was enhanced, thereby resulting in higher adsorption capacity (Lin et al 2008). …”

Section: Effect Of Contact Time and Initial Dye Concentrationmentioning

confidence: 99%

“…The values of ∆H and ∆S were calculated from the intercept and slope of a plot of lnq e /C e versus 1/T according to equation (8) (Lin et al 2008). The high ∆H values for the adsorption of MB onto PMTP-1 indicated that the interactions between MB and the surface polar groups might be strong.…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

Adsorption of Methylene Blue from Aqueous Solution by Periodic Mesoporous Titanium Phosphonate Materials

Ren

Zhu

et al. 2013

Adsorption Science & Technology

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Periodic mesoporous titanium phosphonate (PMTP-1) materials were synthesized and used as an adsorbent for the removal of a cationic dye, methylene blue (MB), from aqueous solutions. The PMTP-1 powder has a uniform mesopore size of 2.9 nm with high surface area of 606 m 2 /g. The batchdye adsorption experiments were performed under various conditions including contact time, adsorbent dose, initial MB concentration, solution pH and temperature. The adsorption equilibrium was achieved after 30 minutes of contact time, and the adsorption of MB on PMTP-1 was best fitted to the Langmuir isotherm model with the maximum monolayer adsorption capacity of 617.28 mg/g. Thermodynamic parameters such as ∆G, ∆H and ∆S were calculated. Results of kinetic studies indicated that the adsorption process followed the pseudo-second-order model, which suggests that the process might be a chemisorption. The study results indicate that the PMTP-1 powder could be used as an efficient adsorbent for the removal of textile dyes from effluents.

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Adsorption of basic dye from aqueous solution onto fly ash

Cited by 166 publications

References 30 publications

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Equilibrium and kinetic adsorption study of aqueous basic dye solutions using waste foundry sand

Adsorption of Methylene Blue from Aqueous Solution by Periodic Mesoporous Titanium Phosphonate Materials

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