Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/4133
Title: Evaluation of adsorption characteristics of new-generation CNT-based adsorbents: characterization, modeling, mechanism, and equilibrium study
Authors: Kocaman, Süheyla
Keywords: CNT-based adsorbents
PANI
Itaconic acid
Adsorption
Methyelene blue
Activated Carbon
Methylene-Blue
Aqueous-Solution
Dye
Removal
Acid
Water
Kinetics
Waste
Degradation
Issue Date: 2023
Publisher: Springer Japan Kk
Abstract: In this study, superior carbon nanotubes (CNT) were chemically modified with itaconic acid (IA) and a polyaniline (PANI) composite was formed and used to remove methylene blue (MB) dye from an aqueous solution. The capacity of CNTs modified with IA (IA/CNT) and composited with PANI (PANI/CNT) to remove MB dye from an aqueous solution was compared and investigated. The effects of parameters such as pH (3-10), adsorbent dose (0.8-8 g/L), initial dye concentra-tion (10-100 mg/L), and temperature (25-55 degrees C) on MB adsorption were investigated. IA/CNT and PANI/CNT adsorbents were characterized by analyzes such as Fourier Transform Infrared Spectroscopy (FT-IR), Field Emission Scanning Electron Microscopy (FE-SEM), transmission electron microscope (TEM), and Brunauer, Emmett and Teller (BET). It was deter-mined that the isotherm data fit the Langmuir isotherm model. The maximum adsorption capacity (q(max)) of PANI/CNT and IA/CNT calculated according to this model (at 25 degrees C) was 12.78 and 32.78 mg g(-1), respectively. Thermodynamic analysis results showed that the adsorption was exothermic, feasible, and spontaneous. It can be said that the possible mechanism of MB on PANI/CNT and IA/CNT adsorbents occurs with the participation of pi-pi interaction, electrostatic attraction and hydrogen bonding.
Description: Article; Early Access
URI: https://doi.org/10.1007/s42823-023-00468-5
https://hdl.handle.net/20.500.13091/4133
ISSN: 1976-4251
2233-4998
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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