Effective adsorption of toluene and benzene on coconut activated carbon modified with carbon nanotubes: kinetics, isotherms and thermodynamics

Memetova, A. E.; Burakova, I. V.; Burakov, Alexander E.; Memetov, N. R.; Ткачев, А. Г.

doi:10.1007/s10450-023-00405-y

Cited by 3 publications

(1 citation statement)

References 56 publications

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“…First, the surface of modified AC has a large number of excellent adsorption sites, as well as a pore structure that is more conducive to adsorbing amoxicillin molecules. Then as the adsorption time increases, amoxicillin molecules occupy the adsorption sites on the modified AC surface, the pores are filled with amoxicillin molecules, the adsorption driving force decreases, and the adsorption gradually enters an equilibrium state 46 . Overall, the adsorption process is divided into three stages.…”

Section: Resultsmentioning

confidence: 99%

Study on the adsorption performance of amoxicillin by hydrothermally modified coconut shell activated carbon

Zhao,

Wang,

Dang

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDUtilizing biowaste derived carbon materials to remediate antibiotic‐rich wastewater has considerable ecological significance in the broader ecological cycle. In this study, coconut shell activated carbon was modified using KOH hydrothermal method, and the influence of modified coconut shell activated carbon on the adsorption of amoxicillin at different particle sizes and treatment temperatures was investigated. In addition, the adsorption kinetics of amoxicillin on different modified coconut shell activated carbon was also studied.RESULTSThe study found that unmodified coconut shell activated carbon itself had a certain adsorption capacity for amoxicillin, with a maximum adsorption capacity of 22.43 mg/g. After hydrothermal‐alkali modification, the adsorption capacity of coconut shell activated carbon for amoxicillin was greatly improved, with an adsorption capacity increase of 221%. In addition, the adsorption kinetic fitting results showed that the adsorption process of amoxicillin on coconut shell activated carbon was more consistent with the pseudo‐second‐order kinetic model.CONCLUSIONThe optimal modification condition for coconut shell activated carbon is to treat coconut shell activated carbon with a particle size of 80‐120 mesh at 160°C. The findings of this study could offer a green and environmentally sustainable approach for amoxicillin‐contaminated wastewater treatment, and could also provide a certain theoretical basis for the application of biowaste resources in organic wastewater treatment.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Study on the adsorption performance of amoxicillin by hydrothermally modified coconut shell activated carbon

Zhao,

Wang,

Dang

et al. 2024

J of Chemical Tech & Biotech

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Aqueous benzene, toluene, ethylbenzene and xylene (BTEX) removal using core-shell structure activated carbon ball as a permeable reactive barrier material

Kim,

Myung,

Kim

et al. 2024

Results in Engineering

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Aqueous benzene, toluene, ethylbenzene and xylene (BTEX) removal using core-shell structure activated carbon ball as a permeable reactive barrier material

Myung,

Kim,

Choi

et al. 2024

Preprint

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Permeable reactive barriers (PRBs) are passive and sustainable treatment systems for remediating the diffusion of contaminant plumes in groundwater. Several conventional reactive materials such as activated carbon (AC) have long been used as reactive media for PRBs. AC, which is known for its high adsorption capability and cost-effectiveness, is commonly used to remove multiple pollutants from groundwater. Unfortunately, among the reactive materials, AC can fill in the barrier and pose practical problems, such as a pressure drop, solid losses during handling, and safe disposal of filled sorbents, because of its low particle strength. In this study, AC balls were prepared using zeolite as the core and powdered AC, quartz, and calcite as the shell. AC ball with excellent mechanical strength and high permeability properties in the form of a core–shell layer is a good alternative to conventional reactive materials. The adsorption characteristics of benzene, toluene, ethylbenzene, and p-xylene (BTEX) from solutions using AC balls were investigated. The adsorption equilibrium is in the order of X > E > T > B. To validate the proposed models, batch experiments indicated that the pseudo-2nd-order and Langmuir models were the most suitable for describing the kinetics and equilibrium of benzene and toluene, respectively. Regeneration experiments were performed using chemical extraction (methanol) and microwave (MW) heating. MW heating is a promising alternative regeneration technique for AC balls. A series of experiments (six adsorption–desorption cycles) revealed that AC balls have considerable reusability. Based on these results, AC balls are a potential reactive medium for field-scale PRB practical remediation applications.

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Effective adsorption of toluene and benzene on coconut activated carbon modified with carbon nanotubes: kinetics, isotherms and thermodynamics

Cited by 3 publications

References 56 publications

Study on the adsorption performance of amoxicillin by hydrothermally modified coconut shell activated carbon

Study on the adsorption performance of amoxicillin by hydrothermally modified coconut shell activated carbon

Aqueous benzene, toluene, ethylbenzene and xylene (BTEX) removal using core-shell structure activated carbon ball as a permeable reactive barrier material

Aqueous benzene, toluene, ethylbenzene and xylene (BTEX) removal using core-shell structure activated carbon ball as a permeable reactive barrier material

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