Removal of the AO7 dye by adsorption on activated carbon based on grape marc: equilibrium, regeneration, and FTIR spectroscopy

Bourahla, Sarra; Nemchi, Fadela; Belayachi, Hanane; Belayachi, Amel; Harrats, Charef; Belhakem, Mostefa

doi:10.1007/s13738-022-02705-6

Cited by 17 publications

(6 citation statements)

References 59 publications

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“…6 a, the composites exhibited seven distinct absorption bands in the 4000–400 cm −1 region, which were attributed to the different functional groups present on the AC. These bands provided valuable information about the structural and chemical properties of the composites [ [41] , [42] , [43] ]. In each spectrum, the peak at 3435.01 cm −1 was attributed to the stretching vibrations of the –NH 2 bonds.…”

Section: Resultsmentioning

confidence: 99%

Synergistic adsorption and photocatalysis study of TiO2 and activated carbon composite

Yue,

Tang

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

Synergistic adsorption and photocatalysis study of TiO2 and activated carbon composite

Yue,

Tang

et al. 2024

Heliyon

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“…The raw SCG mixture and the AC produced were compared using the FTIR technique to highlight the change in characteristic functional groups during activation (Figure 1a,b). The following band assignments were made based on the data found in the literature [43][44][45]:…”

Section: Chemical Group Analysismentioning

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: Chemical Group Analysismentioning

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.

show abstract

Removal of the AO7 dye by adsorption on activated carbon based on grape marc: equilibrium, regeneration, and FTIR spectroscopy

Cited by 17 publications

References 59 publications

Synergistic adsorption and photocatalysis study of TiO2 and activated carbon composite

Synergistic adsorption and photocatalysis study of TiO2 and activated carbon composite

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

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