Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Experimental and Theoretical Study of Methylene Blue Adsorption on a New Raw Material, Cynarascolymus - A statistical Physics Assessment

Chaker Djama
,
Abdallah Bouguettoucha
* ORCID logo ,
Derradji Chebli
,
Abdeltif Amrane
* ORCID logo ,
Hichem Tahraoui
ORCID logo ,
Jie Zhang
ORCID logo ,
Lotfi Mouni
ORCID logo
Version 1 : Received: 5 May 2023 / Approved: 6 May 2023 / Online: 6 May 2023 (10:34:54 CEST)

A peer-reviewed article of this Preprint also exists.

Djama, C.; Bouguettoucha, A.; Chebli, D.; Amrane, A.; Tahraoui, H.; Zhang, J.; Mouni, L. Experimental and Theoretical Study of Methylene Blue Adsorption on a New Raw Material, Cynara scolymus—A Statistical Physics Assessment. Sustainability 2023, 15, 10364. Djama, C.; Bouguettoucha, A.; Chebli, D.; Amrane, A.; Tahraoui, H.; Zhang, J.; Mouni, L. Experimental and Theoretical Study of Methylene Blue Adsorption on a New Raw Material, Cynara scolymus—A Statistical Physics Assessment. Sustainability 2023, 15, 10364.

Abstract

The methylene blue (MB) adsorption was performed on a natural material powder of Cynarascolymus as identified by Cs. To analyze the Cs material, FTIR, SEM, isoelectric point (pHpzc) analysis, TGA, and DRX were used. The maximum experimental adsorption capacity 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 kinetic and isotherms models indicated that the adsorption kinetics fol-lowed a pseudo-nth order model and that the Traditional isotherm model Red-lich-Peterson (R-P) correctly described the experimental data obtained at 298, 303, and 313 K, respectively. The steric, energetic, and thermodynamic characteristics of the most rele-vant advanced model (double-energy single-layer model (AM 2)) were analyzed in 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, and 2.036 at 298, 303, and 313 K, respectively. This indicated the presence of both multi–docking and multimolecular modes for the first style of MB ions (n1); while only a multi-molecular mode for the second style of MB ions (n2). Thermodynamic characteristics demonstrated that MB adsorption onto the Cs adsorbent is spontaneous and feasible.

Keywords

Adsorption; Methylene blue; Cynarascolymus; isotherm; Kinetics; Physical models

Subject

Engineering, Chemical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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