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Lookup NU author(s): Dr Jie ZhangORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Methylene blue (MB) adsorption was performed on a natural material powder of Cynarascolymus as a new inexpensive adsorbent identified by Cs. To analyze the Cs material, FTIR, SEM,isoelectric point (pHpzc) analysis, TGA, and DRX were used. The maximum experimental adsorptioncapacity of the Cs material was 203.333, 192.187, and 179.380 mg.g-1 at 298, 303, and 313 K, respectively.The correlation coefficients (R2) and average percentage errors APE (%) values for the kineticand isotherms models indicated that the adsorption kinetics followed a pseudo-nth order model andthat the traditional isotherm model Redlich–Peterson (R–P) correctly described the experimental dataobtained at 298, 303, and 313 K, respectively. The steric, energetic, and thermodynamic characteristicsof the most relevant advanced model (double-energy single-layer model (AM 2)) were analyzedin detail. The number of active sites for the first receptors (n1) was determined to be 0.129, 0.610,and 6.833, whereas the number of second active sites (n2) was determined to be 1.444, 1.675, and2.036 at 298, 303, and 313 K, respectively. This indicated the presence of both multi–docking andmultimolecular modes for the first style of MB ions (n1), while only a multimolecular mode for thesecond style of MB ions (n2). Thermodynamic characteristics demonstrated that MB adsorption ontothe Cs adsorbent is spontaneous and feasible.
Author(s): Djama C, Bouguettoucha A, Chebli D, Amrane A, Tahraoui H, Zhang J, Mouni L
Publication type: Article
Publication status: Published
Journal: Sustainability
Year: 2023
Volume: 15
Online publication date: 30/06/2023
Acceptance date: 26/06/2023
Date deposited: 18/07/2023
ISSN (electronic): 2071-1050
Publisher: MDPI
URL: https://doi.org/10.3390/su151310364
DOI: 10.3390/su151310364
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