Abstract: In this work, batch adsorption experiments were carried out for the removal of Rhodamine B as a cationic dye from aqueous solutions using activated Carica papaya leaves carbon. The effects of major variables governing the efficiency of the process such as, temperature, initial dye concentration, adsorbent dosage, and pH were investigated. Experimental results have shown that, the amount of dye adsorption increased with increasing the initial concentration of the dye, adsorbent dosage, and temperature. Equilibrium data were fitted to the Langmuir, Freundlich, Temkin, Dubinin-Raduskevich, Harkins-Jura, BET isotherm models and isotherm constants were determined. The adsorption kinetic data were analyzed using pseudo-second-order and Elovich models. Thermodynamic parameters such as changes in the free energy of adsorption (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) were calculated. The negative values of ΔG° indicate that the methylene blue adsorption process is spontaneous in nature and the positive value of ΔH° shows the endothermic nature of the process.
Keywords: Adsorption Activated Carbon, Kinetics, Thermodynamics, Isotherms.
Title: THERMODYNAMIC AND KINETIC ANALYSIS ON THE REMOVAL OF RHODAMINE B DYE USING ACTIVATED NANO CARBON
Author: P. Nashira Begum, C. Kathiravan, R. Chithiravel, S. Arivoli
International Journal of Interdisciplinary Research and Innovations
ISSN 2348-1218 (print), ISSN 2348-1226 (online)
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