Preparation of activated carbon from <i>Dipterocarpus alatus</i> fruit and its application for methylene blue adsorption

Patawat, Chantakorn; Silakate, Ketsara; Chuan-Udom, Somchai; Supanchaiyamat, Nontipa; Hunt, Andrew J.; Ngernyen, Yuvarat

doi:10.1039/d0ra03427d

Cited by 100 publications

(44 citation statements)

References 53 publications

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“…The pH PZC is determinate as the pH value where the surface charge is zero; for the adsorbents in this study, the pH PZC varied between 6.1 and 7.7 (Figure 3a). These results show that the variation in the carbonization time may be influencing the presence and/or amount of functional groups on the surface of the adsorbents, as we noticed in the FTIR spectra, because when pH PZC < 7 represents the predominance of acid groups and above 7 the presence of basic functional groups [35]. When the pH value of the solution is below pH PZC , the adsorbent surface is positively charged, being more efficient in attracting anions [36]; therefore, there will be repulsion between the adsorbent surface and the MB molecules, since MB is a cationic dye.…”

Section: Ph Pzc and Effect Of The Solution Ph On The Mb Adsorptionsupporting

confidence: 59%

How the Carbonization Time of Sugarcane Biomass Affects the Microstructure of Biochar and the Adsorption Process?

Fonseca¹,

Oliveira²,

Martins³

et al. 2022

Sustainability

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Biochars (BCs) are very versatile adsorbents, mainly, in the effectiveness of adsorption of organic and inorganic compounds in aqueous solutions. Here, the sugarcane biomass (SCB) was used to produce biochar at different carbonization times: 1, 2, 3, 4, and 5 h, denominated as BC1, BC2, BC3, BC4, and BC5, respectively. The superficial reactivity was studied with adsorption equilibrium experiments and kinetics models; Methylene Blue (MB) was used as adsorbate at different pH values, concentrations, and temperatures. In summary, the carbonization time provides the increase of superficial area, with exception of BC4, which decreased. Equilibrium studies showed inflection points and fluctuations with different initial dye concentration and temperature; SCB showed the best adsorption capacity compared to the BCs at the three temperatures tested, varying with the increase of MB concentration, suggesting the dependence of these two main factors on the adsorption process. The proposed adsorption mechanism suggests the major influence of Coulomb interactions, H-bonding, and π-interactions on the adsorption of MB onto adsorbents, evidencing that the adsorption is led by physical adsorption. Therefore, the results led to the use of the SCB without carbonization at 200 °C, saving energy and more adsorbent mass, considering that the carbonization influences weight loss. This study has provided insights of the use of SCB in MB dye adsorption as a low-cost and eco-friendly adsorbent.

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Section: Ph Pzc and Effect Of The Solution Ph On The Mb Adsorptionsupporting

confidence: 59%

How the Carbonization Time of Sugarcane Biomass Affects the Microstructure of Biochar and the Adsorption Process?

Fonseca¹,

Oliveira²,

Martins³

et al. 2022

Sustainability

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“…As the pH increases, more and more BiOCl microsphere surface becomes negatively charged, and the adsorption of MB is facilitated consequently; thus, the adsorption amount increases. [35] At pH 12, the BiOCl microsphere shows maximum removal efficiency (100 %) toward MB. When the pH value is higher than 12, deprotonating appears to part hydroxyl groups, and the electron clouds density of nitrogen containing group rises, leading to the increment of repellent force.…”

Section: Chemistryselectmentioning

confidence: 94%

Fast and Selective Methyl Blue Adsorption from Aqueous Solution on 3D BiOCl Microspheres

Dong

Zhou

2022

ChemistrySelect

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Lihong Dong designed the experiments, performed a part of experiment, analyzed the data, completed the writing of the paper and revised the manuscript. Chunyi Zhou performed another part of experiment.Three dimensional BiOCl microspheres self-assembled by nanoplates were fabricated by one step hydrothermal route in water and glycerol mixed solvent. Negatively charged surfaces of the nanoplates make these BiOCl microspheres possess excellent selectivity for cationic dyes removal. The removal efficiency of BiOCl microspheres is almost not affected by pH, and high removal efficiency of 96 % still remains even though at a pH of 2. Another merit of the BiOCl microspheres is their high adsorption rate, and only 2 ∼ 20 min is needed to get adsorption equilibrium. The maximum adsorption capacity of MB reaches 146.4 mg g À 1 . The used BiOCl microspheres can be regenerated by a simple process, and 75 % removal efficiency is maintained after five adsorption-regeneration cycles. Overall, benefitting from their ultrafast rate, high adsorption capability, simple fabrication, good regenerability, and environment friendly nature, the BiOCl microspheres can be adopted as an effective adsorbent for wastewater treatment.

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“…The highest maximum capacity, Qm of 99.3 mg/g was calculated for H-AC, which is in close agreement with the experimental value. The adsorption is assumed as a monolayer coverage of methylene blue molecules onto the homogeneous adsorbent surface [12]. The Langmuir constant, b is a measure of dye affinity towards the adsorbent, whose magnitude represents a favourable adsorption at low concentration.…”

Section: Equilibrium Adsorptionmentioning

confidence: 99%

Isotherm and kinetics of methylene blue removal byMusa acuminatapeel adsorbents

Noor

Zaini

Yunus

2021

Acta Chemica Malaysia

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Adsorbents were derived from banana peel through chemical treatment using phosphoric acid, potassium hydroxide, and sodium hydroxide to adsorb methylene blue from water. The adsorption of methylene blue was performed at varying concentrations and contact times. The equilibrium data fitted well with Langmuir equation, with a maximum monolayer adsorption capacity of 99.28 mg/g (28%). Phosphoric acid-treated adsorbent exhibits a greater capacity despite a lower affinity than the other adsorbents. A two-stage batch adsorber model was developed to optimize the adsorbent dosage for performance evaluation. Banana peel is a promising resource of adsorbent for wastewater treatment.

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Preparation of activated carbon from Dipterocarpus alatus fruit and its application for methylene blue adsorption

Abstract: Activated carbons were prepared from Dipterocarpus alatus fruit by chemical and physical activation and used for the removal of methylene blue from aqueous solution.

Cited by 100 publications

References 53 publications

How the Carbonization Time of Sugarcane Biomass Affects the Microstructure of Biochar and the Adsorption Process?

How the Carbonization Time of Sugarcane Biomass Affects the Microstructure of Biochar and the Adsorption Process?

Fast and Selective Methyl Blue Adsorption from Aqueous Solution on 3D BiOCl Microspheres

Isotherm and kinetics of methylene blue removal byMusa acuminatapeel adsorbents

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