Effective adsorption of toluene and benzene on coconut activated carbon modified with carbon nanotubes: kinetics, isotherms and thermodynamics.
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| Title: | Effective adsorption of toluene and benzene on coconut activated carbon modified with carbon nanotubes: kinetics, isotherms and thermodynamics. |
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| Authors: | Memetova, Anastasia E.1 (AUTHOR), Burakova, Irina V.1 (AUTHOR) iris_tamb68@mail.ru, Burakov, Alexander E.1 (AUTHOR), Memetov, Nariman R.1 (AUTHOR), Tkachev, Alexey G.1 (AUTHOR) |
| Source: | Adsorption. Aug2023, Vol. 29 Issue 5/6, p335-349. 15p. |
| Abstract: | The paper describes the adsorption of toluene and benzene on a new sorption material—coconut activated carbon (AC) modified with carbon nanotubes. The new material was characterized using Raman spectroscopy, scanning and transmission electron microscopy, X-ray diffractometry and FTIR. Also, the parameters of the porous space and the specific surface area were determined. The adsorption capacity for toluene and benzene was 123.53 and 84.92 mg g−1, respectively, the contact time was 60 min. The kinetic data were described using intraparticle diffusion, and the results of isothermal studies were described using the Langmuir, Freundlich, and Dubinin-Radushkevich equations. It was found that the adsorption of toluene and benzene considered Weber-Maurice model, that conform to a diffusion with fluid phase film resistance. In addition, the physical nature of adsorption is confirmed by the values of free energy (E = 6.92 and 8.41 kJ moL−1 for benzene and toluene, respectively). According to a thermodynamic study, the Gibbs energy values for nanomodified AC were − 16.32 kJ moL−1 for benzene and − 33.33 kJ moL−1 for toluene, which corresponds to the range of values for physical sorption. Thus, the material can be considered as a promising adsorbent for removing organic pollutants from aqueous media. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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