Review of activated carbon adsorbent material for textile dyes removal: Preparation, and modelling

Husien, Shimaa; El-taweel, Reem M.; Salim, Alyaa I.; Fahim, Irene S.; Said, Lobna A.; Radwan, Ahmed G.

doi:10.1016/j.crgsc.2022.100325

Cited by 85 publications

(37 citation statements)

References 98 publications

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“…The 1/n value of the Freundlich model indicates the heterogeneity of the system, with a lower value indicating a higher degree of heterogeneity. [24] The K F constant, as determined for the Freundlich isotherm, represents the strength of the interactions between the adsorbate and the adsorbent. [25] An increased value for this parameter indicates a higher adsorption capacity of the adsorbent, thus facilitating the removal of the chemical from the system.…”

Section: Adsorption Of Methyl Redmentioning

confidence: 99%

Methyl Red Adsorption on Biochar Obtained by Physical Activation of Caraway Seeds with Carbon Dioxide

Paluch,

Bazan‐Wozniak,

Pietrzak

2024

ChemPhysChem

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In this study carbon adsorbents were produced from caraway (Carum carvi L.) seeds, through direct and physical activation by carbon dioxide. The resulting biochar adsorbents were analyzed using low‐temperature nitrogen adsorption‐desorption isotherms and Boehm titration. Furthermore, the acid‐base properties of the biochar samples obtained were examined, and the pH of their aqueous extracts was determined. The obtained adsorbents had a specific surface area ranging between 10 to 70 m2/g. Resulting carbon materials exhibited a predominance of basic groups on their surfaces. The sorption capacities of methyl red for the samples varied from 3 to 20 mg/g. Conducted adsorption studies determined, that the adsorption kinetics of the dye on biochar materials followed a pseudo‐second order model and the adsorption process was best described by the Freundlich isotherm, indicating the development of a multi‐layer adsorbate on their surfaces. The effectiveness of adsorption in aqueous solutions of methyl red increased with the rise in process temperature. Moreover, the adsorption process was found to be spontaneous and endothermic based on thermodynamic investigations.

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Section: Adsorption Of Methyl Redmentioning

confidence: 99%

Methyl Red Adsorption on Biochar Obtained by Physical Activation of Caraway Seeds with Carbon Dioxide

Paluch,

Bazan‐Wozniak,

Pietrzak

2024

ChemPhysChem

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“…The most widely used sorbents today are materials based on activated carbon. They show relatively high efficiency in binding dyes from wastewater [ 10 ], but are quite expensive. Therefore, cheaper alternatives are being sought.…”

Section: Introductionmentioning

confidence: 99%

The Use of Chitin from the Molts of Mealworm (Tenebrio molitor) for the Removal of Anionic and Cationic Dyes from Aqueous Solutions

et al. 2023

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The possibility of using chitin from the molts of an insect–ealworm (Tenebrio molitor) to remove anionic (RB5, RY84) and cationic dyes (BV10, BR46) from aqueous solutions was investigated. The scope of the research included, among others: Characteristics of chitin from mealworms (FTIR, SEM, pHPZC), the effect of pH on sorption efficiency, sorption kinetics (pseudo-first, pseudo-second order, intramolecular diffusion models) and the determination of the maximum sorption capacity (Langmuir and Freundlich models). The sorption efficiency of anionic dyes on chitin from mealworm was the highest at pH 2–3, and for cationic dyes at pH 6. The equilibrium time of sorption of anionic dyes was 240–300 min and for cationic dyes it was 180–240 min. The experimental data on dye sorption kinetics was best described by the pseudo-second order model. The maximum sorption capacity of chitin from the mealworm for the anionic dyes RB5 and RY84 was 121.15 mg/g and 138.55 mg/g, respectively, and was higher than with some carbon-based materials (literature data). In the case of cationic dyes, the sorption capacity of the tested chitin was lower and reached 3.22 mg/g and 59.56 mg/g for BV10 and BR46, respectively.

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“…Different chemical compounds can be used as activators, such as phosphoric acid, zinc chloride, potassium carbonate, sodium hydroxide, and potassium hydroxide. Accordingly, the type of activator used dictates the nature of the adsorbent and its adsorption behaviour (Husien et al, 2022;Kim et al, 2020). Potassium carbonate is a better and safer activating agent than potassium hydroxide because it produces higher activated carbon yield, surface area, and pore volume.…”

Section: Introductionmentioning

confidence: 99%

“…Potassium carbonate is a better and safer activating agent than potassium hydroxide because it produces higher activated carbon yield, surface area, and pore volume. Moreover, biochar produced by potassium carbonate has a higher capacity for the adsorption of larger molecules such as methylene blue (Husien et al, 2022). The use of iron (III) salt as a catalyst during biomass carbonisation facilitated the formation of an aromatic structure, which provided adsorption sites for polar and nonpolar organic contaminants from an aqueous solution (Han et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Adsorption activity of spent coffee ground biochar for the removal of Vivizole Red 3BS dye from aqueous solution

Adamu

Zewge

Chebude

2023

Preprint

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Spent coffee ground (SCG) is rich in carbon, and slow pyrolysis can convert biomass into biochar that can be used as an adsorbent to remove dyes. In one-step carbonization and activation of SCG, iron (III) chloride and K2CO3 were used as a catalyst and solid-state activator, respectively. The predictive model for the removal of the dye by the activated SCG biochar was evaluated through response surface methodology- central composite design (RSM-CCD). ANOVA result analysis showed that among the model terms, the effect of pH was the most significant in removing the Vivizole Red 3 BS 150 % (VR 3BS) dye. The optimum values suggested by the CCD were an initial dye concentration of 20 mg/L, pH 3, an adsorbent dose of 0.5 g per 100 mL, and a contact time of 60 min, where the optimum removal of the dye was 94 %. The optimum conditions were validated using synthetic and textile wastewater, and the percent removals of the VR 3BS dye by the activated SCG were 96% and 90 %, respectively. The dye removal efficiency of activated SCG biochar was more significant than that of commercial activated carbon. The Langmuir model best described the adsorption isotherm. Adsorption kinetic data fitted well to the pseudo-second-order model. Both intraparticle and film diffusions affected the dye's adsorption rate. The thermodynamics study has shown that the adsorption process was a spontaneous, less random, exothermic process governed by a physical sorption mechanism. Thermal regeneration of the exhausted biochar improved VR 3BS dye removal efficiency.

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Review of activated carbon adsorbent material for textile dyes removal: Preparation, and modelling

Cited by 85 publications

References 98 publications

Methyl Red Adsorption on Biochar Obtained by Physical Activation of Caraway Seeds with Carbon Dioxide

Methyl Red Adsorption on Biochar Obtained by Physical Activation of Caraway Seeds with Carbon Dioxide

The Use of Chitin from the Molts of Mealworm (Tenebrio molitor) for the Removal of Anionic and Cationic Dyes from Aqueous Solutions

Adsorption activity of spent coffee ground biochar for the removal of Vivizole Red 3BS dye from aqueous solution

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