Kinetic and Mechanism of the Adsorption of ß-Carotene Rich-Palm Oil onto Smectite Clay Activated by Fe (II) Lewis Acid Ion

Kepdieu, Jean Marie; Djangang, Chantale Njiomou; Tchanang, Gustave; Mache, Jacques Richard; Abi, Charles Fon; Blanchart, Philippe

doi:10.47672/jchem.1284

Cited by 5 publications

(3 citation statements)

References 5 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The kinetics and equilibrium modeling and calculations are done using models and techniques commonly described such as Langmuir, Freundlich, and Redlich-Paterson for isotherms models and pseudo-first-order, pseudo-second-order and Weber Morris or intra-particle diffusion for kinetic models [15,[24][25][26][27][28][29].…”

Section: Kinetics and Equilibrium Theorymentioning

confidence: 99%

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Kepdieu,

Djangang,

Njimou

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

The present work aimed to use Oryza sativa husk (rice husk) in the fabrication of a nanosilica-doped smectic clay for the adsorption of Basic Blue 9 in synthetic aqueous solutions. Response surface methodology was used to evaluate the effects of the considered factors namely, initial dye concentration (10 - 30 mg/L), initial pH (8 - 11), and contact time (0 - 100 min) on the adsorption process. The regression model was found to be able to predict more than 99 % of the targeted response variation in the studied range (R2 = 99.98 %) based on 95% confidence. The analysis of variance proved the significance and the accuracy of the mathematical model. The F-values (1539.08) and p-values (< 0.05) generated by Minitab21 Sofware©, indicating that almost all the independent factors were statistically significant in the studied ranges. Based on the coefficients, initial dye concentration was more influential, followed by pH and contact time. Also, concentration x pH interaction was more effective followed by concentration x contact time. The pH x contact time interaction was very weak and those results were in accordance with factorial, surfaces, and contours plots. The pseudo-second-order kinetic and Langmuir models fitted well to the experimental data with determination coefficients of 0.976 and 0.965 respectively. Under the optimal conditions (30 mg/L, pH 11, t > 50 min; and adsorbent dose of 0.5 g/L, almost 96.33% of the dye was removed. Os-sm is thus an interesting and effective alternative for the removal of BB9 in aqueous solutions.

show abstract

Section: Kinetics and Equilibrium Theorymentioning

confidence: 99%

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Kepdieu,

Djangang,

Njimou

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In order to elucidate the mechanism of adsorption of NR4 onto SSC, the experimental data have been compared to the theoretical models of pseudo-first order, pseudo-second order, and intraparticle diffusion which are commonly used in the adsorption of dyes [27][28][29][30][31]…”

Section: Kinetics and Thermodynamicsmentioning

confidence: 99%

Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Kepdieu,

Djangang,

Njimou

et al. 2023

AJPS

View full text Add to dashboard Cite

Purpose: A study of the removal of dye Natural red 4 (NR4) by a low-cost silica-smectite clay labeled SSC was carried out. Methodology: Batch tests were carried on with some processing parameters namely initial dye concentration (10 - 50 mg/L), temperature (25 – 65 °C), adsorbent dose (1 – 5 g/L), initial pH (4 – 8) and contact time (0 - 120 min). Findings: The Energy of adsorption was less than 20 kJ/mol showing a physisorption process. Also, thermodynamics parameters such as enthalpy of activation ∆H* (19.0 kJ/mol), entropy of activation ∆S* (- 024 kJ/mol/K) and Gibbs free energy of activation ∆G* (90.57 - 100.17 kJ/mol) revealed that the adsorption of NR4 molecules onto SSC was endothermic and with no significant changes in the internal structure of the adsorbent. The pseudo-first order and pseudo-second order had a good correlation with experimental data with R2 = 0.99 and R2 = 0.98 respectively. Langmuir isotherm model matched well the equilibrium data with a maximum adsorption capacity Qm of 25.55 mg/g. and a correlation value of 0.98. Unique Contribution to Theory, Policy and Practice: The newly synthesized and characterized low-cost silica-smectite composite is effective in the adsorptive removal of natural red 4 dye from water wastes.

show abstract

“…Ah²mad et al 2009; Al-Ghouti et Da'ana 2020;Djangang et al 2015; J. M Kepdieu et al 2022;Nga et al 2022;Pohndorf, Cadaval Jr, et Pinto 2016;Vidoca et al 2020…”

unclassified

Application of γ-Nanoalumina-based Kaolinitic Clay (Na-Kc) in the Adsorptive Removal of Basic Blue 9 from aqueous synthetic Solution

Tchanang,

Kepdieu,

Djangang

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

Experimental and theoretical investigations related to the adsorptive removal of Basic blue 9 (BB9) onto γ-nanoAl2O3 have been done in the present work. Batch tests were carried out varying some processing parameters namely initial dye concentration (5 - 50 mg/L), adsorbent dose (0.5 - 5 g/L), initial pH (1 - 12) and contact time (0 - 30 min). Under conditions of C0 = 50 mg/L; pH = 11; dose = 1g/L and t = 15 min, more than 83.6% of the BB9 molecules were removed. The pseudo-second order and the Langmuir models fit well the experimental data with highest R2 values of 0.99 and 0.91 respectively and lowest values of χ2. This suggests a two- step mechanism on a homogeneous distribution of active sites on the adsorbent surface. The adsorption mechanism first involved electrostatic interactions between the negatively charged γ-nanoAl2O3 surface in basic medium and secondly electrophilic-nucleophilic interactions. Compared to other adsorbents, γ-nanoAl2O3 of this work is a good alternative for treatment water containing dye BB9.

show abstract

Kinetic and Mechanism of the Adsorption of ß-Carotene Rich-Palm Oil onto Smectite Clay Activated by Fe (II) Lewis Acid Ion

Cited by 5 publications

References 5 publications

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Application of γ-Nanoalumina-based Kaolinitic Clay (Na-Kc) in the Adsorptive Removal of Basic Blue 9 from aqueous synthetic Solution

Contact Info

Product

Resources

About