Role of carbon material surface functional groups on their interactions with aqueous solutions

Atchabarova, A. A.; Abdimomyn, S.K.; Abduakhytova, D.A.; Zhigalenok, Y.R.; Tokpayev, Rustam; Kishibayev, K.K.; Khavaza, Tamina; Kurbatov, Andrey; Zlobina, Y.V.; Djenizian, T.J.

doi:10.1016/j.jelechem.2022.116707

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…This method assumes that NaOH neutralizes carboxyl, lactone, and phenol groups (acidic groups); Na 2 CO 3 neutralizes carboxyl and lactone; NaHCO 3 neutralizes only carboxyl groups, respectively. In addition, HCl neutralizes basic groups [22,23]. Moreover, the point of zero charges (PZC) was estimated to corroborate the results obtained by the Boehm method by mass titrations at different pHs following the procedure described elsewhere [24].…”

Section: Characterization Of the Adsorbentsmentioning

confidence: 67%

Batch and Continuous Column Adsorption of p-Nitrophenol onto Activated Carbons with Different Particle Sizes

et al. 2023

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The study focused on investigating the solvent adsorption of p-Nitrophenol (PNP) onto activated carbons for wastewater treatment. It explored the influence of adsorbate concentration and adsorbent size on equilibrium isotherms and removal rates to develop efficient adsorption processes. The study examined adsorption isotherms under equilibrium conditions utilizing both the Langmuir and Double-Langmuir models and the Dubinin–Radushkevich equation. Remarkably, all the models demonstrated equally excellent fitting to the experimental data. Kinetics of PNP adsorption were investigated using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic models. This provided insights into the dominant adsorption mechanism and mass transfer phenomena, aiding the design of efficient wastewater treatment processes. Strong correlations (correlation coefficients > 0.9) were found between the models and experimental data for three types of activated carbons under batch conditions. This validation enhances the reliability and applicability of the models, supporting their practical use. The study also observed a slight increase in maximum adsorption capacity (qmax) with decreasing particle size, although there is not a significant difference: 340, 350, and 365 mg·g−1, for CB-L, CB-M, and CB-S, respectively. This insight helps in selecting appropriate activated carbon for effective PNP removal, considering both adsorption capacity and particle size. Furthermore, the analysis of PNP adsorption under dynamic conditions in fixed-bed columns highlighted the significance of inlet velocity and carbon mass in determining breakthrough time, with particle size playing a secondary role. This information aids in optimizing the design and operation of fixed-bed adsorption systems for efficient PNP removal. In summary, this study’s significant contributions lie in enhancing our understanding of PNP adsorption in wastewater treatment. By investigating equilibrium isotherms, kinetics, and mass transfer phenomena, it provides validated models, insights into adsorption capacity and particle size, and practical guidance for dynamic adsorption systems. These findings contribute to the development of efficient and sustainable wastewater treatment methods.

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Section: Characterization Of the Adsorbentsmentioning

confidence: 67%

Batch and Continuous Column Adsorption of p-Nitrophenol onto Activated Carbons with Different Particle Sizes

et al. 2023

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“…In addition, the surface acid value of the synthesized product was measured by Boehm's titration method to calculate its carboxyl group content. 15 Standard solutions of NaOH and HCl at concentrations of 0.1 mol L −1 were prepared. HPB-2 (100 mg) was evenly dispersed into a NaOH (50 mL) solution, stirred under airtight conditions for 24 h, and centrifuged to separate the precipitate.…”

Section: Methodsmentioning

confidence: 99%

“…The number of adsorption active sites mainly depends on the content of the functional groups on the surface of the adsorbent, which are positively correlated. In addition, the surface acid value of the synthesized product was measured by Boehm’s titration method to calculate its carboxyl group content …”

Section: Methodsmentioning

confidence: 99%

Porous Adsorbents Cross-Linked with Waste Polystyrene Foam and 3,3′,4,4′-Biphenyltetracarboxylic Acid Dianhydride for the Effective Removal and Enrichment of Cationic Dyes

Zhao,

Xie,

Chen

et al. 2023

ACS Appl. Polym. Mater.

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Postconsumer solid waste has received wide attention in the development of raw materials for innovative products. In this paper, waste polystyrene (WPS) foam was employed as a starting material to react with 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) to synthesize a series of hyper-cross-linked polymers (HPB-s). The maximum adsorption capacities of the hyper-cross-linked adsorbents were 3082.2 and 3279.4 mg g–1 for malachite green (MG) and safranine T, respectively. The kinetics and isotherms were more consistent with the pseudo-second-order and Freundlich models, and the thermodynamic data indicated that the adsorption process was heat-absorbing and spontaneous. Furthermore, HPB-2 still maintained a complete shape and a high adsorption capacity after five adsorption–desorption cycles. More importantly, the adsorption studies for three binary mixed dye systems showed that HPB-2 exhibited efficient and selective adsorption behavior toward cationic dyes from water. The present work demonstrates that HPB-2 has promising potential in purifying dye wastewater.

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Electrochemical modification of the carbon material surface by hydroxyl groups

Atchabarova,

Abdimomyn,

Abduakhytova

et al. 2023

J Solid State Electrochem

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Role of carbon material surface functional groups on their interactions with aqueous solutions

Cited by 4 publications

References 26 publications

Batch and Continuous Column Adsorption of p-Nitrophenol onto Activated Carbons with Different Particle Sizes

Batch and Continuous Column Adsorption of p-Nitrophenol onto Activated Carbons with Different Particle Sizes

Porous Adsorbents Cross-Linked with Waste Polystyrene Foam and 3,3′,4,4′-Biphenyltetracarboxylic Acid Dianhydride for the Effective Removal and Enrichment of Cationic Dyes

Electrochemical modification of the carbon material surface by hydroxyl groups

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