Adsorption studies of methylene blue and phenol onto vetiver roots activated carbon prepared by chemical activation

Altenor, Sandro; Carene, Betty; Emmanuel, Évens; Lambert, Jacques; Ehrhardt, J.J.; Gaspard, Sarra

doi:10.1016/j.jhazmat.2008.10.133

Cited by 426 publications

(167 citation statements)

References 49 publications

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“…During the past thus stable in the receiving environment, posing a serious decade, a great deal of attention has been given to themselves but may be passed onto further generations methods of converting these materials into useful products [15]. Consequently many investigators have studied the feasibility of using low cost sorbents such as: coconut husk [16,17], wheat bran [18], vetiver roots [19], cotton stalk and its hull [20], date stones [21,22], pistachio nut shell [23], apple promace and wheat straw [24]. The aim of the present study is to explore the capability of Citrullus Lanatus Rind to remove basic dye, crystal violet, from aqueous solution under different experimental conditions such as contact time, biosorbent dosage, pH, initial dye concentration, temperature, particle size and agitation speed.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium, Thermodynamic and Kinetic Studies on Adsorption of a Basic Dye by Citrullus Lanatus Rind

Suyamboo¹

2012

IJEE

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An effective biosorbent was developed from Citrullus Lanatus Rind and its various biosorption characteristics were studied for removing a basic dye (Crystal Violet) from its aqueous solution. A series of experiments were conducted in a batch system to assess the effects of the system variables such as contact time, biosorbent dosage, pH, initial dye concentration, temperature, particle size and agitation speed. The biosorbent studied exhibits high efficiency for crystal violet adsorption and the equilibrium states could be achieved in 180 min for the different initial concentrations. The equilibrium adsorption data were analyzed by the Langmuir, Freundlich, Tempkin and Harkins-Jura isotherm models. The equilibrium data indicates the following order to fit the isotherms: Freundlich > Tempkin > Harkins-Jura isotherm > Langmuir. The maximum dye adsorption capacity was found to be 11.99 mg/g at 50°C. The biosorption kinetics was found to follow pseudo-second-order rate kinetic model, with good correlation (R = 0.99) and the intra particle diffusion as one 2 of the rate determining steps. Different thermodynamic parameters, like Gibb's free energy (ΔG), enthalpy (ΔH) and entropy (ΔS) of the adsorption process have also been evaluated. The thermodynamic parameters of crystal violet biosorption indicated, the process was spontaneous and endothermic. The results indicated that the biosorbent studied was found to be a promising alternative for the adsorption of crystal violet from aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Equilibrium, Thermodynamic and Kinetic Studies on Adsorption of a Basic Dye by Citrullus Lanatus Rind

Suyamboo¹

2012

IJEE

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“…For example, methylene blue (cationic dye) molecules are more susceptible to lodge on an adsorbent with a pore diameter larger than 1.5 nm [32]. On the other hand, microporous activated carbon is most widely used, and limited only for the adsorption of micropollutants and heavy metal ions.…”

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confidence: 99%

Potassium hydroxide activation of activated carbon: a commentary

Hui

Zaini²

2015

Carbon letters

217

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“…A higher zinc (II) uptake was achieved at higher bed height due to the increase in the amount of the BC/RHA/WH mixture which provided more binding sites for the metal ions. Altenor et al [18] observed that the increase in bed height also increase the mass transfer zone. Hence in a fixed bed system, an increase in bed height would create a longer distance for the mass transfer zone to reach the exit resulting in an extended breakthrough time [19].…”

Section: Effect Of Flow Ratementioning

confidence: 98%

Fixed Column Study for the Removal of Zinc (II) Ions from Waste Water by Bone Char Rice Husks Ash and Water Hyacinth Composite-Mixture

2016

IJSR

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Abstract:The adsorption potential of animal charcoal (BC/RHA/WH composite mixture to remove Zinc (II) ions from industrial wastewater was investigated using a fixed bed column was investigated. The effects of bed height (2 -10) cm, flow rate (5 -10) ml/min and feed concentration (diluted in the ratio 1:1 and 1:2) on the break through characteristics were determined. The highest bed capacity of 476.2 mg/g mg/g was obtained using 10 cm bed height, 1:2 feed concentration and 5 ml/min flow rate. The results indicate that adsorption capacity increased with increase in the inlet ion concentration and bed height and decreased with increase in flow rate. Adsorption data was fitted to Adam-Bohart, Thomas and Yoon-Nelson models.

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Adsorption studies of methylene blue and phenol onto vetiver roots activated carbon prepared by chemical activation

Cited by 426 publications

References 49 publications

Equilibrium, Thermodynamic and Kinetic Studies on Adsorption of a Basic Dye by Citrullus Lanatus Rind

Equilibrium, Thermodynamic and Kinetic Studies on Adsorption of a Basic Dye by Citrullus Lanatus Rind

Potassium hydroxide activation of activated carbon: a commentary

Fixed Column Study for the Removal of Zinc (II) Ions from Waste Water by Bone Char Rice Husks Ash and Water Hyacinth Composite-Mixture

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