Utilization of Cotton Stalks-Biomass Waste in the Production of Carbon Adsorbents by KOH Activation for Removal of Dye-Contaminated Water

Fathy, Nady A.; Girgis, Badie S.; Khalil, Lila B.; Farah, Joseph Y.

doi:10.5714/cl.2010.11.3.224

Cited by 23 publications

(11 citation statements)

References 34 publications

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“…Also, these results were analyzed using two principal isotherm models, Langmuir and Freundlich. It was found that the equilibrium isotherms were well described by the Langmuir equation, giving a maximum adsorption capacity of 19.2 mg/g by sawdust at 30 • C. Furthermore, the adsorption kinetics can be well represented by the pseudo-second-order model equation (24)(25)(26)(27) .…”

Section: Discussionmentioning

confidence: 94%

“…The adsorption kinetic process is largely dependent on the physical and/or chemical characteristics of both the adsorbent and adsorbate (24)(25)(26)(27) . Figure 9 shows the controlling mechanism in the adsorption of the basic blue 41 (BB41) with initial concentration of 100 mg/L at 30 o C examined using various kinetic models such as pseudo-first order, pseudo-second order and Elovich models in order to determine whether the process is such as mass transfer and/or chemical reaction were evolved:…”

Section: Kinetics Of Adsorptionmentioning

confidence: 99%

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Modified Waste Materials for Removal of Cationic Dye from Liquid Effluents and Their Kinetic Studies .

2015

Egypt. J. Chem.

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N the present paper, natural adsorbents such as starch, …..sawdust (collected from a local sawmill) and orange peel were grafted in order to remove C.I. Basic Blue 41 (BB 41) from aqueous solution by adsorption. Batch mode experiments were conducted at 30ºC to study the effects of pH, adsorbent mass and contact time (0-240 min). Equilibrium adsorption isotherms and kinetics were investigated. The experimental adsorption data were analyzed by the Langmuir and Freundlich isotherms. The results showed that adsorption capacity is dependent on the pH, initial concentration of dye and contact time. Changes in the surface chemical groups in the adsorbent starch, orange peel and sawdust waste materials were investigated via Fourier transform infrared (FTIR). In the case of starch and sawdust the OH group after grafting is reduced while the carboxylic group is increased and vice versa after adsorption of a dye, indicating that the adsorption of dye is occurred between carboxylic groups and cationic group in basic dye. But in the case of orange peel the result is conversely. Equilibrium isotherms were well described by the Langmuir equation, giving maximum adsorption capacity of 19.2 mg/g by sawdust adsorbent at 30 • C. The adsorption kinetics can be well represented by the pseudo-second-order model equation.

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Section: Discussionmentioning

confidence: 94%

Section: Kinetics Of Adsorptionmentioning

confidence: 99%

Modified Waste Materials for Removal of Cationic Dye from Liquid Effluents and Their Kinetic Studies .

2015

Egypt. J. Chem.

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“…The micropore volume was determined via Dubinin-Radushkevich equation (V DR ) considering N 2 adsorption data at relative pressure lower than 0.1. The N 2 volume adsorbed at relative pressure close to 0.10 (V 0.10 ) was calculated in order to obtain the mesopore volume (V meso ) of the samples using the equation V meso = V net − V 0.10 (Fathy et al, 2010).…”

Section: Characterization Of Activated Carbonsmentioning

confidence: 99%

Microporous Activation Carbon Made of Sawdust From Two Forestry Species for Adsorption of Methylene Blue and Heavy Metals in Aqueous System – Case of Real Polluted Water

Cruz¹

2018

Rev.Mex.Ing.Quim.

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“…This mixture was admitted into stainless steel reactor and heated at different heat treatment temperatures of 700, 750 and 800 o C. At each activation temperature, the sample was kept for 30 min in a self-generated atmosphere. Then the obtained ACs were thoroughly washed with 1 N HCl solution, followed by hot water washing for several times until pH 6 and dried at 100 o C overnight [28].…”

Section: Preparation Of Acsmentioning

confidence: 99%

“…The cotton is the main crop in Egypt, and the planting area is approximately 3 million ha, and the estimated amounts of CS are more than 1.6 million tonnes are generated annually [27]. Therefore, indigenous-low-cost CS-ACs with plenty of surface oxygencontaining functional groups were prepared by KOH activation of semicarbonized CS as described in previous investigation [28]. In this paper, a mild concentration of acid was used with KOH-ACs, in order to improve the adsorption capacity of these carbons for removal of Pb (II) ions from aqueous solution by batch method.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium Removal of Pb (II) Ions from Aqueous Solution onto Oxidized-KOH-Activated Carbons

Fathy¹,

El-Sherif²

2011

Carbon letters

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In the present study, the removal of Pb (II) ions on oxidized activated carbons (ACs) was investigated. ACs were derived from activation of indigenous cotton stalks waste with potassium hydroxide (KOH) in two-stage process. The KOH-ACs were subjected to liquid-phase oxidation with hot HNO 3 and one untreated sample was included for comparison. The obtained carbons were characterized by Fourier transform infrared (FTIR), slurry pH and N 2-adsorption at 77 K, respectively. Adsorption capacity of Pb (II) ions on the resultant carbons was determined by batch equilibrium experiments. The experimental results indicated that the oxidation with nitric acid was associated with a significant increase in mass of yield as well as a remarkable reduction in internal porosity as compared to the untreated carbon. The AC-800N revealed higher adsorption capacity than that of AC-800, although the former sample exhibited low surface area and micropore volume. It was observed that the adsorption capacity enhancement attributed to pore widening, the generation of oxygen functional groups and potassium containing compounds leading to cation-exchange on the carbon surface. These results show that the oxidized carbons represented prospective adsorbents for enhancing the removal of heavy metals from wastewater.

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Utilization of Cotton Stalks-Biomass Waste in the Production of Carbon Adsorbents by KOH Activation for Removal of Dye-Contaminated Water

Cited by 23 publications

References 34 publications

Modified Waste Materials for Removal of Cationic Dye from Liquid Effluents and Their Kinetic Studies .

Modified Waste Materials for Removal of Cationic Dye from Liquid Effluents and Their Kinetic Studies .

Microporous Activation Carbon Made of Sawdust From Two Forestry Species for Adsorption of Methylene Blue and Heavy Metals in Aqueous System – Case of Real Polluted Water

Equilibrium Removal of Pb (II) Ions from Aqueous Solution onto Oxidized-KOH-Activated Carbons

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