On the Adsorption of Aromatics on Oxygenated Activated Carbon in Nonaqueous Adsorption Media

Arafat, Hassan A.; Ahnert, Falk; Pinto, Neville G.

doi:10.1081/ss-120027400

Cited by 16 publications

(13 citation statements)

References 21 publications

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“…(2014) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] www.deswater.com doi: 10.1080/19443994.2014.990932 excellent chemical and temperature stability, and fast cure. The demand for m-PDA is growing rapidly with increase in application of engineering materials, especially aromatic polyamide fibers and polyurethane [6].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…-COOH; H-donor) and amino groups (H acceptor) [20,21]. The reduction in m-PDA adsorption at highly basic conditions (pH [11][12][13] can be attributed to electrostatic repulsion between the negatively charged activated carbon and the deprotonated m-PDA molecule.…”

Section: Effect Of Solution Phmentioning

confidence: 99%

“…However, adsorption methods are more effective due to their cost-effectiveness, effective treatment in dilute solutions, high uptake capacity, faster regeneration kinetics, and greater selectivity [11]. In this regard, many adsorbents including pyrolusite and activated carbon [12], oxygenated activated carbon [13], montmorilloniteCe-phosphate compound [2], beta-cyclodextrin-based polymers [14], phenyl-functionalized mesoporous silica [15] have been investigated in recent years for sorption of aromatic amines.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

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Removal of m-phenylene diamine by adsorption onto activated carbon: kinetics, equilibrium and process design

Patel

Rathod

Mody

et al. 2014

Desalination and Water Treatment

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A B S T R A C TThe adsorption behavior of m-phenylene diamine (m-PDA) from aqueous solution onto activated carbon was investigated under various experimental conditions, such as contact time, adsorbate concentration, and temperature. Maximum adsorption capacity for m-PDA was found to be 33.17 mg g −1 at pH 7.0 and temperature 303 K. The adsorption kinetics data were best described by the pseudo-second-order rate equation and the equilibrium was achieved after 120 min. The m-PDA adsorption was governed by film diffusion process. Besides, equilibrium data were very well represented by the Redlich-Peterson model. A model for prediction of the dose of adsorbent required to achieve a range of m-PDA removals for a given number of adsorption-desorption cycles has been developed and validated based on the Langmuir isotherm. Thermodynamic parameters indicated the spontaneous, endothermic, and increased random nature of m-PDA adsorption. The amide, carboxylic acid, and nitro groups of the activated carbon were involved in chemical interaction with the m-PDA molecules. Results suggested that the activated carbon has good potential for remediation of m-PDA contaminated waters.

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Section: Desalination and Water Treatmentmentioning

confidence: 99%

Section: Effect Of Solution Phmentioning

confidence: 99%

Section: Desalination and Water Treatmentmentioning

confidence: 99%

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Removal of m-phenylene diamine by adsorption onto activated carbon: kinetics, equilibrium and process design

Patel

Rathod

Mody

et al. 2014

Desalination and Water Treatment

View full text Add to dashboard Cite

show abstract

“…To study the effect of solvent hydrophobicity on the adsorption of aromatic compounds, Arafat et al [10] used cyclohexane and heptane as solvents with a number of aromatic adsorbates. They found that adsorption capacities for hydrophobic aromatic compounds (i.e., benzene and xylene) are lower in heptane than in cyclohexane.…”

Section: Abu-daabes and Pinto 2998mentioning

confidence: 99%

“…[10] Furthermore, acidic groups were reported to account for more than 90% of the total surface oxygen groups. [10] Furthermore, acidic groups were reported to account for more than 90% of the total surface oxygen groups.…”

Section: Effects Of Surface Oxygenmentioning

confidence: 99%

Effect of Surface Oxygen Complexes of Activated Carbon on Phenol Adsorption from Single and Mixed Non-Aqueous Solvents

Abu‐Daabes

Pinto

2004

Separation Science and Technology

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The effects of heterogeneous oxygen groups of activated carbon on the adsorption of dissolved phenol in single and mixed solvents have been studied. Cyclohexane, heptane, and mixtures of cyclohexane and heptane with different volumetric ratios have been used as solvents. Solvent hydrophobicity, the capability of the molecules to H-bond, and dispersive/repulsive interactions were found to be the main factors that affect the adsorption capacity. In a homogeneous mixed solvent, all phenol isotherms were very close to the pure heptane rather than pure cyclohexane isotherm for the untreated carbon, which has the lowest surface oxygen concentration. However, as the concentration of surface 2997 oxygen increases, phenol isotherms from the mixed solvents are more evenly distributed. It is suggested that selective segregation of the different solvents molecules (cyclohexane and heptane) can occur in the adsorbed phase based on differences in hydrophobicity between solvent molecules.

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Removal of Indoor Pollutants (VOCs): Phytoremediation Applications and Adsorption Studies Using Immersion Calorimetry

Hernández-Monje

Giraldo

Moreno–Piraján

2021

Phytoremediation for Environmental Sustainability

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On the Adsorption of Aromatics on Oxygenated Activated Carbon in Nonaqueous Adsorption Media

Cited by 16 publications

References 21 publications

Removal of m-phenylene diamine by adsorption onto activated carbon: kinetics, equilibrium and process design

Removal of m-phenylene diamine by adsorption onto activated carbon: kinetics, equilibrium and process design

Effect of Surface Oxygen Complexes of Activated Carbon on Phenol Adsorption from Single and Mixed Non-Aqueous Solvents

Removal of Indoor Pollutants (VOCs): Phytoremediation Applications and Adsorption Studies Using Immersion Calorimetry

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