Academic Journal
Kinetics and thermodynamics of enhanced adsorption of E120 dye using activated carbon
| Τίτλος: | Kinetics and thermodynamics of enhanced adsorption of E120 dye using activated carbon |
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| Συγγραφείς: | Mater H. Mahnashi, Samer S. Abu-Alrub, Mohammad W. Amer, Ali O. Alqarni |
| Πηγή: | Tropical Journal of Pharmaceutical Research; Vol. 20 No. 3 (2021); 585-592 |
| Στοιχεία εκδότη: | African Journals Online (AJOL), 2022. |
| Έτος έκδοσης: | 2022 |
| Θεματικοί όροι: | Composite material, Activated carbon, Biomedical Engineering, Organic chemistry, Endothermic process, FOS: Medical engineering, Quantum mechanics, 01 natural sciences, Engineering, Enthalpy, Ionic strength, Langmuir adsorption model, Carbon fibers, Aqueous solution, Descriptive Geometry, Carmine dye E120, Activated carbon, Thermodynamics, Adsorption isotherm, Kinetic models, Chromatography, Freundlich equation, Physics, Composite number, Geometric Modeling and Nanomaterial Applications in Engineering, Materials science, 0104 chemical sciences, Chemistry, Kinetics, Langmuir, Physical Sciences, Thermodynamics, Adsorption |
| Περιγραφή: | Purpose: To study the adsorption of dye (E120) from aqueous solution onto activated carbon. Method: Factors influencing adsorption were examined and optimized. Three adsorption isotherm models (Langmuir, Freundlich and Temkin) were investigated. Agitation time was set at 72 hours, E120 dye concentration at 10 – 80 mg/L, pH at 7, temperature at 25°C and mass at 125 mg. Results: Adsorption of E120 dye onto activated carbon was enhanced by decreasing the mass of activated carbon, pH and ionic strength of the solution and by increasing the temperature. Under optimal conditions, the maximum adsorption capacity of activated carbon for E120 dye was 10.1 mg/g at 30°C. The model parameters were 0.307 L/mg (KL), 10.1 mg/g (qm), 0.9491 (R2) for the Langmuir isotherm; 2.98 (n), 0.445 mg/g (Kf), and 0.6592 (R2) for Freundlich isotherm; and 4.59 mg/L (A), 2.23 J/mol (B), and 0.5914 (R2) for Temkin isotherm. Thermodynamic studies indicate that the adsorption of E120 dye onto activated carbon is an endothermic process with an adsorption enthalpy (ΔH) of 8.7 KJ/mol. The positive values for ΔG indicate that adsorption was non-spontaneous. The kinetic study of E120 dye adsorption showed that the adsorption process obeyed pseudo-second order kinetics. Conclusion: Commercially available activated carbon, in terms of its physical and chemical characteristics, is a superior adsorbent to other adsorbents mentioned in the literature for removal of toxic dye E120 from aqueous solutions at a high removal capacity. |
| Τύπος εγγράφου: | Article Other literature type |
| Περιγραφή αρχείου: | application/pdf |
| ISSN: | 1596-9827 1596-5996 |
| DOI: | 10.4314/tjpr.v20i3.21 |
| DOI: | 10.60692/24e7m-bfn43 |
| DOI: | 10.60692/f7z5j-05q31 |
| Σύνδεσμος πρόσβασης: | https://www.ajol.info/index.php/tjpr/article/download/220163/207750 https://www.ajol.info/index.php/tjpr/article/view/220163 |
| Rights: | CC BY |
| Αριθμός Καταχώρησης: | edsair.doi.dedup.....61ecdb636d1d239c1fbab74f3ee4ad7a |
| Βάση Δεδομένων: | OpenAIRE |
| ISSN: | 15969827 15965996 |
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| DOI: | 10.4314/tjpr.v20i3.21 |