Adsorption Study of Methylene Blue and Eriochrome Black T Dyes on Activated Carbon and Magnetic Carbon Composite

Fajarwati, Febi Indah; Anugrahwati, Mai; Yanti, Ika; Safitri, Rika Awalin; Yeni,; Yuanita, Erika

doi:10.1088/1757-899x/599/1/012025

Cited by 16 publications

(8 citation statements)

References 15 publications

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“…The adsorption of EBT dye by zeolite from fly ash followed pseudo-second order kinetics model and Freudlich isotherm model. These results were the same as those obtained in previous studies, namely the adsorption of EBT dye by clay [26] and by activated carbon [27].…”

Section: Adsorption Kinetics Model and Adsorption Isotherm Modelsupporting

confidence: 90%

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Purbasari,

Purwanto,

Alfizhari

et al. 2023

J. Phys.: Conf. Ser.

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Valorization of fly ash as zeolite is one of sustainable ways to reduce environmental burden. In this paper, zeolite was prepared from fly ash by hydrothermal process and applied as dyes adsorbent. In hydrothermal process, fly ash was reacted with 5 N NaOH solution using solid/liquid ratio of 1/30 for 15 hours at temperature of 85°C. Characterization of hydrothermal products consisted of X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area, and scanning electron microscope (SEM) analysis. The results indicated the formation of Na-X zeolite with higher surface area compared to raw fly ash. The obtained zeolite was applied as Eriochrome Black-T (EBT) dye adsorbent. Adsorption was conducted in batch process with variations in time and dye initial concentration. The adsorption efficiency would increase with increasing time, but after 90 minutes the adsorption efficiency would be relatively constant. The higher the dye initial concentration, the lower the adsorption efficiency. Furthermore, the study of adsorption kinetics model and adsorption isotherm model that had been carried out showed that adsorption process of EBT dye by zeolite from fly ash tended to follow pseudo-second order kinetics model and Freundlich isotherm model.

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Section: Adsorption Kinetics Model and Adsorption Isotherm Modelsupporting

confidence: 90%

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Purbasari,

Purwanto,

Alfizhari

et al. 2023

J. Phys.: Conf. Ser.

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“…reveal the chemisorptions and spontaneous accumulation of Cr(VI) ions and Cr(III) ions over the adsorbent surface [33].…”

Section: ) Resultsmentioning

confidence: 99%

Removal of Noxious Cr (VI) and Cr (III) Ions by Hierarchically Tailored Pseudo-Monolithic Silica/Activated Carbon Composite

Melhi¹

2022

MCPS

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In the present study, 2.34 m (average) silica particles with large pore size (363 Å) have been prepared from bulk monoliths by using sol-gel method and were then chemically modified by reaction with a C-18 and was used for the adsorption of Cr (VI)and Cr (III) ions from wastewater. The prepared adsorbent was characterized by Scanning electronic microscope (SEM) and X-ray Diffraction (XRD) analysis before and after the adsorption of Cr (III) and Cr (VI) ions. The amount of Cr (III) and Cr (VI) adsorbed was detected by Atomic Absorption spectroscopy (AAS). The 90 % Cr (VI) and 98 % Cr (III) were achieved at pH3 and, 6 respectively. The process followed pseudo 2 nd order kinetics, Langmuir and Freundlich isotherms well. The ΔG values were -50.02 and -49.62 kJ mol −1 , for Cr(VI) ions and Cr(III) ions respectively, which show spontaneous adsorption of Cr(VI) and Cr(III) ions on to AC surface. ΔH was 44.18 kJ mol -1 for Cr(VI) and 39.55 kJ mol −1 "for Cr(III) ions, are showing the endothermic nature of adsorption. The ΔS (152 J mol -1 K -1 for Cr(VI) and 139.88 mol -1 K -1 for Cr(III) ions) showing sorbate/sorbent complex stability.

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“…where the adsorption capacity (KF mmol 1−1/n kg −1 L 1/n ) and 1/n represented the surface heterogeneity and can be calculated from the slope and intercept of the graph (Figure 9c). The Freundlich parameters are tabulated in Table 2 [46,47]. The mass transfer during the process in the rate-determining step can be determined by using kinetic models [2,37,38].…”

Section: Effect Of CD (Ii) Ion Solution Concentrationmentioning

confidence: 99%

Section: The Thermodynamic Studymentioning

confidence: 99%

Remediation of Cd (II) Ion from an Aqueous Solution by a Starch-Based Activated Carbon: Experimental and Density Functional Theory (DFT) Approach

et al. 2022

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Heavy metal ion pollution is a serious threat for aquatic and terrestrial living beings. Adsorption is a facile process to encounter heavy metal pollution. Various types of adsorbents have been developed and used for environmental remediation. Activated carbon is one of the cheapest adsorbents derived from various biomass. In this work, the adsorption of cadmium ions (Cd (II)) with starch-based activated carbon (AC) having a specific surface area of 1600 m2g−1 was investigated in a series of batch laboratory studies. The effective operating parameters, such as initial pH (pH0), initial concentration of metal ions, contact time, and temperature on the adsorption, were investigated. Validation of the kinetic study shows that the adsorption process is better predicted by the pseudo-second-order model. The extended Freundlich and Langmuir isotherms were applied to the study. The results show that the metal ion adsorption capacities of activated carbon increased with increasing pH, and it was found that maximum adsorption (284 mg g−1) of Cd (II) was achieved at pH solution of 5.5–6. The thermodynamic parameters, such as ∆G, ∆H, and ∆S, were found to be −17.42 kJ mol−1, 8.49 kJ mol−1, and 58.66 J mol−1 K−1, respectively, revealing that the adsorption mechanism is endothermic, spontaneous, and feasible. Furthermore, the density functional theory simulations demonstrated that the activated carbon strongly interacted with toxicity and mobility, so it is very urgent to remove this species from industrial wastewater before it is discharged into the environment. The adsorption energy calculated for all interactive sites was negative (−43.41 kJ mol−1 to −967.74 kJ mol−1), showing effective interaction between the adsorbate and adsorbent. The PDOS clearly shows that there is a stronger overlapping at the Femi level between the d orbital of the Cd ion and the p orbital of the O atom, showing a strong interaction and confirming the chemical bond formation between the Cd (II) ion and O atom.

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Adsorption Study of Methylene Blue and Eriochrome Black T Dyes on Activated Carbon and Magnetic Carbon Composite

Cited by 16 publications

References 15 publications

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Valorization of fly ash as zeolite by hydrothermal process for dyes adsorption

Removal of Noxious Cr (VI) and Cr (III) Ions by Hierarchically Tailored Pseudo-Monolithic Silica/Activated Carbon Composite

Remediation of Cd (II) Ion from an Aqueous Solution by a Starch-Based Activated Carbon: Experimental and Density Functional Theory (DFT) Approach

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