Batch adsorption of indigo carmine on activated carbon prepared from sawdust: A comparative study and optimization of operating conditions using Response Surface Methodology

In this study, activated carbon produced from oak cupules (ACOC) was prepared using chemical activation with H3PO4. ACOC is subsequently used as an adsorbent to facilitate the removal of an acidic dye, naphthol blue black (NBB), and basic dye crystal violet (CV) from aqueous solutions. The ACOC was characterized by FTIR spectroscopy, XRD, and SEM. The adsorption isotherm data fits well with the Langmuir model for NBB and CV. The kinetic models of adsorption of NBB and CV by ACOC were pseudo-first order and pseudo-second order, respectively. Thermodynamic parameters were evaluated and indicated that the adsorption of both dyes onto ACOC was endothermic and spontaneous. The adsorption capacity of ACOC reached 208 mg g−1 for NBB and 658 mg g−1 for CV. ACOC was shown to be a promising adsorbent for the removal of NBB and CV from aqueous solutions.

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“…The mixture was stirred for 24 h in a shaker until equilibrium at 25 °C. The final pH values of the solutions were recorded [ 10 , 11 ].…”

Section: Methodsmentioning

confidence: 99%

Adsorption of Anionic and Cationic Dyes on Activated Carbon Prepared from Oak Cupules: Kinetics and Thermodynamics Studies

Alkhabbas

Al-Ma’abreh

Edris

et al. 2023

IJERPH

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“…The value of entropy change was also negative and thus indicated the probability of favourable adsorption. When ∆𝑆 < 0, the adsorption of adsorbate onto the adsorbent was less random (Bhowmik et al, 2021). It has been suggested that when -20 kJ mol -1 < ∆𝐺 < 0 and ∆𝐻 < 80 kJ mol -1 (Ma et al, 2021), and for the electrostatic interaction, the value of ∆𝐻 ranges from 20 to 80 kJ/mol, thus the adsorbateadsorbent interaction was governed by physical mechanism, mainly electrostatic interaction (Phuong et al, 2019).…”

Section: Adsorption Thermodynamicsmentioning

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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“…Response surface methodology was applied to optimize the combination effect on the adsorption efficiency (Ads%) [32,42].…”

Section: Full Factorial Design Of Experimentsmentioning

confidence: 99%

Experimental Design Analysis of Murexide Dye Removal by Carbon Produced from Waste Biomass Material

Dhahri

Guizani

Yılmaz

et al. 2022

Journal of Chemistry

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The aim of this work is to investigate the adsorption of an anionic dye, the Murexide (MX) present in aqueous solution, on activated carbon, derived from prickly pear seed cake biomass after bio-oil extraction. The obtained adsorbent used was characterized by Bohem titration, pH of point of zero charge (pHPZC), FTIR spectroscopy, Brunauer–Emmett–Teller surface area (SBET), and scanning electron microscopy (SEM). The different experimental parameters of the adsorption process, such as temperature, contact time, initial dye concentration, and adsorbent dose, were studied. For the optimization of the process, the effects of these parameters were investigated using the full factorial experimental design methodology. Design Expert 11.1.2.0 Trial software was used for generating the statistical experimental design and analysing the observed data. Langmuir and Freundlich’s adsorption models were employed to provide a description of the equilibrium isotherm. The adsorption process was found to obey Langmuir, which indicates that the Murexide had formed a monolayer onto activated carbon. Furthermore, according to the regression coefficients, it was observed that the kinetic adsorption data can fit better by the pseudo-second-order model compared to the first-order Lagergren’s model. The thermodynamic studies indicated that the adsorption of Murexide occurs in a spontaneous and exothermic process. The regeneration process of the exhausted adsorbent was studied to assess the economic and operational feasibility. According to the obtained findings, it is proposed that the activated carbon prepared from prickly pear seed cake retains a high potential for Murexide removal and is suitable for repetitive usage.

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Batch adsorption of indigo carmine on activated carbon prepared from sawdust: A comparative study and optimization of operating conditions using Response Surface Methodology

Cited by 36 publications

References 34 publications

Adsorption of Anionic and Cationic Dyes on Activated Carbon Prepared from Oak Cupules: Kinetics and Thermodynamics Studies

Adsorption of Anionic and Cationic Dyes on Activated Carbon Prepared from Oak Cupules: Kinetics and Thermodynamics Studies

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

Experimental Design Analysis of Murexide Dye Removal by Carbon Produced from Waste Biomass Material

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