Adsorption of Acid Yellow 99 by polyacrylonitrile/activated carbon composite: Kinetics, thermodynamics and isotherm studies

El-Bindary, A.A.; Hussien, Mostafa A.; Diab, M.A.; Eessa, Ahmed M.

doi:10.1016/j.molliq.2014.05.003

Cited by 65 publications

(25 citation statements)

References 37 publications

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“…pH is one the most important mechanisms governing adsorption processes [51]. Higher uptake at relatively low acid conditions confirms the interference of H + ions and increased electrostatic repulsive interactions, resulting in the lowest adsorption at high pH values [52][53].…”

Section: Effects Of Solution Phmentioning

confidence: 88%

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Amin¹,

Alazba²,

Amin³

2017

Pol. J. Environ. Stud.

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In this study, date palm fibres and orange peel in both individual and hybrid forms were studied for the removal of copper, lead, and arsenic. Equilibrium was achieved after 150 minutes, and the highest and the lowest removal efficiencies were for Cu +2 and As(V), respectively. A slightly higher removal efficiency of metal ions using orange peel was observed, which could be due to the greater number of functional groups on the chemically pre-treated adsorbent. The highest removal was observed at pH 6, and the adsorption data exhibited a linear increase in metal removal capacity with increasing adsorbent concentrations from 0.1 to 2 g/L. A significantly higher removal efficiency was observed for a 45 µm particle size compared to larger particle sizes. Additionally, a 30-40% decrease in removal efficiencies was observed for all three heavy metal ions when using the date palm fibres or the hybrid adsorbent when the initial metal concentrations were increased from 20 to 80 mg/L. The Freundlich model agreed with the experimental data slightly better than the Langmuir model for both date palm fibres and the hybrid adsorbent. A pseudo second-order kinetic model better described the kinetic behaviour of As(V) adsorption on the investigated adsorbents. Date palm fibres exhibited exothermic adsorption, while both orange peel and the hybrid adsorbent displayed exothermic and endothermic reactions. Increased randomness at the solid-liquid interface was observed for all adsorbents, and the Gibbs free energy change values were negative, confirming the spontaneous nature of adsorption, which proceeded in the forward direction.

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Section: Effects Of Solution Phmentioning

confidence: 88%

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Amin¹,

Alazba²,

Amin³

2017

Pol. J. Environ. Stud.

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show abstract

“…Moreover, the values of G • increased with increasing temperature, suggesting that the adsorption process became less favorable at higher temperatures. The negative values of H • indicate that the adsorption process of RB4 dye is exothermic (El-Bindary et al, 2014). The negative value of S • reveals that randomness decreases at the solid-solution interface during the adsorption.…”

Section: Effect Of Temperature and The Thermodynamic Studymentioning

confidence: 98%

Elimination of reactive blue 4 from aqueous solutions using 3-aminopropyl triethoxysilane modified chitosan beads

Vakili

Rafatullah

Salamatinia

et al. 2015

Carbohydrate Polymers

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“…Therefore, many industries use adsorption techniques (mainly in the tertiary stage of biological treatment) for reducing hazardous inorganic/organic pollutants present in effluents [7]. Numerous works have been recently published with primary goal in the investigation of removal of different pollutants (either in gas or liquid medium) using adsorbent materials [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Agricultural peels for dye adsorption: A review of recent literature

Anastopoulos¹,

Kyzas²

2014

Journal of Molecular Liquids

250

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Adsorption of Acid Yellow 99 by polyacrylonitrile/activated carbon composite: Kinetics, thermodynamics and isotherm studies

Cited by 65 publications

References 37 publications

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Elimination of reactive blue 4 from aqueous solutions using 3-aminopropyl triethoxysilane modified chitosan beads

Agricultural peels for dye adsorption: A review of recent literature

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