Sorption properties of low calorific value Greek lignites: Removal of lead, cadmium, zinc and copper ions from aqueous solutions

Pentari, Despina; Perdikatsis, V.; Katsimicha, D.; Kanaki, A.

doi:10.1016/j.jhazmat.2009.02.131

Cited by 54 publications

(43 citation statements)

References 28 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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“…However, the application of these methods is restricted due to technical complexity and economical constraint. Adsorption process is one of the most common methods used in wastewater treatment because of its low cost, simplicity and high efficiency [5]- [7]. The important characteristics of adsorbent are the adsorption capacity, selectivity, possibility of regeneration, reaction velocity, compatibility and price.…”

Section: Introductionmentioning

confidence: 99%

Isotherm, Kinetic and Thermodynamic Studies on the Adsorption of Cd (II) and Zn (II) ions from Aqueous Solutions onto Bottom Ash

Sukpreabprom¹,

Arquero²,

Naksata³

et al. 2014

IJESD

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Abstract-Bottom ash is a waste material obtained from electricity generation through combustion of coal at the Mae Moh power plant in Thailand. The adsorption of Cd (II) and Zn (II) ions from aqueous solutions onto bottom ash was studied using batch experiments. The effect of pH, contact time and temperature were investigated. Adsorption isotherm data for metal ions was analyzed by the Langmuir and Freundlich isotherms. The Freundlich isotherm properly described the adsorption data for all studied temperatures. The results revealed that the adsorption kinetics followed pseudo-second-order kinetic model. Thermodynamic parameters such as Gibbs free energy change (∆G°), enthalpy change (∆H°) and entropy change (∆S°) were investigated. The calculated values showed that the adsorption process for both Cd (II) and Zn (II) ions was endothermic.

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“…Various modifications on rice husk have been reported in order to enhance sorption capacities for metal ions and other pollutants [13,14]. Zn(II) was also removed from water using different sorbents including activated carbon [15], modified flax shive [16], rice husk ash [17], waste biomass [2], waste activated sludge [2] and lignite [18].…”

Section: Introductionmentioning

confidence: 99%

Removal of Zn(II) and Hg(II) from aqueous solution on a carbonaceous sorbent chemically prepared from rice husk

El-Shafey

2010

Journal of Hazardous Materials

165

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Sorption properties of low calorific value Greek lignites: Removal of lead, cadmium, zinc and copper ions from aqueous solutions

Cited by 54 publications

References 28 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

Isotherm, Kinetic and Thermodynamic Studies on the Adsorption of Cd (II) and Zn (II) ions from Aqueous Solutions onto Bottom Ash

Removal of Zn(II) and Hg(II) from aqueous solution on a carbonaceous sorbent chemically prepared from rice husk

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