Fixed-Bed Column Adsorption Modeling of MnO₄- Ions from Acidic Aqueous Solutions on Activated Carbons Prepared with the Biomass  

作　　者：Charly Mve Mfoumou Francis Ngoye Pradel Tonda-Mikiela Mbouiti Lionel Berthy Bouassa Mougnala Spenseur Guy Raymond Feuya Tchouya Charly Mve Mfoumou;Francis Ngoye;Pradel Tonda-Mikiela;Mbouiti Lionel Berthy;Bouassa Mougnala Spenseur;Guy Raymond Feuya Tchouya(Laboratoire de Chimie des Milieux et des Matériaux Inorganiques (LC2MI), URCHI, Université des Sciences et Techniques de Masuku (USTM), Franceville, Gabon;Département de Chimie, Faculté des Sciences, Université des Sciences et Techniques de Masuku (USTM), Franceville, Gabon)

机构地区：[1]Laboratoire de Chimie des Milieux et des Matériaux Inorganiques (LC2MI), URCHI, Université des Sciences et Techniques de Masuku (USTM), Franceville, Gabon [2]Département de Chimie, Faculté des Sciences, Université des Sciences et Techniques de Masuku (USTM), Franceville, Gabon

出　　处：《Open Journal of Inorganic Chemistry》2023年第2期25-42,共18页无机化学期刊（英文）

摘　　要：Activated carbons calcined at 400˚C and 600˚C (AC-400 and AC-600), prepared using palm nuts, collected in the town of Franceville in Gabon, were used to study the dynamic adsorption of MnO₄-</sup> ions in acidic media on fixed bed column and on the kinetic modeling of experimental data of breakthrough curves of  MnO₄-</sup> ions obtained. Results on the adsorption of MnO₄-</sup>  ions in fixed-bed dynamics obtained on AC-400 and AC-600 adsorbents beds indicated that the AC-400 bed appears to be the most efficient in removing MnO₄-</sup>  ions in acidic media. Indeed, the adsorbed amounts, the adsorbed capacities at saturation and the elimination percentage of MnO₄-</sup>  ions obtained with AC-400 (31.24 mg;52.06 mg·g^-1 and 41.65% respectively) were higher compared to those obtained with AC-600 (9.87 mg;16.45 mg·g^-1 and 17.79% respectively). The breakthrough curves kinetic modeling revealed that the Thomas model and the pseudo-first-order kinetic model were the most suitable models to describe the adsorption of MnO₄-</sup>  ions on adsorbents studied in our experimental conditions. The results of the intraparticle diffusion model showed that intraparticle diffusion was involved in the adsorption mechanism of MnO₄-</sup>  ions on investigated adsorbents and was not the limiting step and the only process controlling MnO₄-</sup>  ions adsorption. In contrast to AC-400, the intraparticle diffusion on AC-600 bed plays an important role in the adsorption mechanism of MnO₄-</sup>  ions.Activated carbons calcined at 400˚C and 600˚C (AC-400 and AC-600), prepared using palm nuts, collected in the town of Franceville in Gabon, were used to study the dynamic adsorption of MnO₄-</sup> ions in acidic media on fixed bed column and on the kinetic modeling of experimental data of breakthrough curves of  MnO₄-</sup> ions obtained. Results on the adsorption of MnO₄-</sup>  ions in fixed-bed dynamics obtained on AC-400 and AC-600 adsorbents beds indicated that the AC-400 bed appears to be the most efficient in removing MnO₄-</sup>  ions in acidic media. Indeed, the adsorbed amounts, the adsorbed capacities at saturation and the elimination percentage of MnO₄-</sup>  ions obtained with AC-400 (31.24 mg;52.06 mg·g^-1 and 41.65% respectively) were higher compared to those obtained with AC-600 (9.87 mg;16.45 mg·g^-1 and 17.79% respectively). The breakthrough curves kinetic modeling revealed that the Thomas model and the pseudo-first-order kinetic model were the most suitable models to describe the adsorption of MnO₄-</sup>  ions on adsorbents studied in our experimental conditions. The results of the intraparticle diffusion model showed that intraparticle diffusion was involved in the adsorption mechanism of MnO₄-</sup>  ions on investigated adsorbents and was not the limiting step and the only process controlling MnO₄-</sup>  ions adsorption. In contrast to AC-400, the intraparticle diffusion on AC-600 bed plays an important role in the adsorption mechanism of MnO₄-</sup>  ions.

关 键 词：Acidic Media MnO₄ style=margin-left:-6px >- BIOMASS Activated Carbon Dynamic Adsorption Kinetics Models 

分 类 号：O64[理学—物理化学]