Enhanced removal of Basic Brown1 dye from aqueous solutions by Sawdust activated carbon. Equilibrium, thermodynamic and kinetics

Amellal, Tissem; Boukhalfa, Noura; Meniai, Abdeslam Hassan

doi:10.1016/j.dwt.2024.100057

Cited by 4 publications

(2 citation statements)

References 43 publications

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“…The ∆G • values become more negative with the increasing temperature, suggesting that the adsorption process is facilitated. This effect could be due to the widening of the AC pores with the increasing temperature, resulting in an easier diffusion of AO7 molecules and greater accessibility to adsorption sites located within the AC [52,54].…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Aouay,

Attia,

Dammak

et al. 2024

Materials

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Spent coffee grounds (SCGs) have great potential as a useful, value-added biological material. In this context, activated carbon (AC) was prepared from SCGs by an activation process using H3PO4 at 600 °C in the air and used as an adsorbent for the azo dye AO7, a model molecule for dye colorants found in textile industry effluents. X-ray diffraction, SEM and BET revealed that the AC was predominantly amorphous, consisting of a powder of 20–100 µm particles with mesopores averaging 5.5 nm in pore size. Adsorption kinetics followed a pseudo-second-order law, while the Langmuir model best fitted the experimental isotherm data (maximum capacity of 119.5 mg AO7 per AC g). The thermodynamic parameters revealed that adsorption was endothermic and spontaneous. All the characterizations indicated that adsorption occurred by physisorption via mainly π–π interactions. The best experimental removal efficiency optimized by means of a Box–Behnken design and response surface methodology was 98% for an initial AO7 concentration of 20 mg·L−1 at pH 7.5 with a dose of 0.285 g·L−1 of AC and a contact time of 40 min. These results clearly show that activated carbon prepared from SCGs can be a useful material for efficiently removing organic matter from aqueous solutions.

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Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Aouay,

Attia,

Dammak

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…The ΔG° values become more negative with increasing temperature, suggesting that the adsorption process is facilitated. This effect could be due to the widening of the AC pores with increasing temperature, resulting in easier diffusion of AO7 molecules and greater accessibility to adsorption sites located within the AC [41,43].…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Aouay,

Afef,

Damak

et al. 2024

Preprint

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Spent coffee grounds (SCG) have great potential as a useful, value-added biological material. In this context, activated carbon (AC) was prepared from SCG by an activation process using H3PO4 at 600°C in air and used as an adsorbent for the azo dye AO7, a model molecule for dye colorants found in textile industry effluents. X-ray diffraction, SEM and BET revealed that the AC was predominantly amorphous, consisting of a powder of 20-100 µm particles with mesopores averaging 5.5 nm in pore size. Adsorption kinetics followed a pseudo-second-order law, while the Langmuir model best fitted experimental isotherm data (maximum capacity of 119.5 mg AO7 per AC g). Thermodynamic parameters revealed that adsorption was endothermic and spontaneous. All the characterizations indicated that adsorption occurred by physisorption via mainly - interactions. The best experimental removal efficiency optimized by means of a Box-Behnken design and response surface methodology was 98% for an initial AO7 concentration of 20 mg.L-1 at pH 7.5 with a dose of 0.285 g.L-1 of AC and a contact time of 40 min. These results clearly show that activated carbon prepared from SCG can be a useful material for efficiently removing organic matter from aqueous solutions.

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Citrullus colocynthis seeds activated with H2O2/NaOH as a promising efficient methyl green stain-removing biosorbent

El Mannoubi,

Azizi,

Alghamdi

et al. 2024

Euro-Mediterr J Environ Integr

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Enhanced removal of Basic Brown1 dye from aqueous solutions by Sawdust activated carbon. Equilibrium, thermodynamic and kinetics

Cited by 4 publications

References 43 publications

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Activated Carbon Prepared from Waste Coffee Grounds: Characterization and Adsorption Properties of Dyes

Citrullus colocynthis seeds activated with H2O2/NaOH as a promising efficient methyl green stain-removing biosorbent

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