دورية أكاديمية
Kinetics and thermodynamics of adsorption of red dye 40 from acidic aqueous solutions onto a novel chitosan sulfate
| العنوان: | Kinetics and thermodynamics of adsorption of red dye 40 from acidic aqueous solutions onto a novel chitosan sulfate |
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| المؤلفون: | Rios-Donato, N., Peña-Flores, A.M., Katime, I., Leyva-Ramos, R., Mendizábal, E. |
| المصدر: | Afinidad. Revista de química teórica y aplicada; Vol. 74, Núm. 579 (2017) Afinidad; Vol. 74, Núm. 579 (2017) |
| Publication Status: | published |
| بيانات النشر: | Universitat Ramon Llull, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Adsorption, chitosan sulfate, pH, RedDye 40. |
| الوصف: | The kinetic and thermodynamics of adsorption of Red Dye 40 from acidic aqueous solutions onto a partially sulfated chitosan (ChS) was studied. The partially sulfated ChS was water insoluble in the pH range of 2-12. Experiments were carried out batch wise to determine the effect of pH, dye concentration, and temperature on the adsorption capacity of ChStowards Red Dye 40. It was found that the equilibrium dye-binding capacity of ChS (qe) increased with increasing initial dye concentration; however, the percentage of dye removal decreased. Dye adsorption capacity of ChS increased when the solution pH was reduced. The Langmuir model was better fitted the experimental adsorption equilibrium data, and therate of dye adsorption onto ChS follows the pseudosecond order kinetic model. The adsorption capacity of ChS was enhanced by increasing the temperature.The thermodynamic adsorption parameters, enthalpy(ΔH°), entropy (ΔS°), and Gibbs energy (ΔG°) were evaluated. The adsorption process was endothermic, and the Gibbs energy negative indicating that it occurred spontaneously. |
| نوع الوثيقة: | article |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2339-9686 0001-9704 |
| Relation: | https://www.raco.cat/index.php/afinidad/article/view/328558/419163 |
| URL الوصول: | https://www.raco.cat/index.php/afinidad/article/view/328558 |
| رقم الأكسشن: | edsrac.328558 |
| قاعدة البيانات: | RACO (Revistes Catalanes amb Accés Obert) |
| تدمد: | 23399686 00019704 |
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