1. EQUILIBRIUM, KINETIC AND THERMODYNAMIC STUDIES OF ADSORPTION OF METHYLENE BLUE ON ACTIVATED CARBON FROM COCOA POD SHELLS
- Author
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Herman Yapi Yapo, Djamatche Paul Valery Akesse, Kouakou Seraphin Konan, Bini Kouame Dongui, David Leonce Kouadio, and Akissi Lydie Chantal Koffi
- Subjects
chemistry.chemical_compound ,Point of delivery ,Adsorption ,chemistry ,Inorganic chemistry ,medicine ,Kinetic energy ,Methylene blue ,Activated carbon ,medicine.drug - Abstract
The aim of this research is to investigate the feasibility of using activated carbon from cocoa pod shells, waste from agriculture to adsorb methylene blue from aqueous solutions through batch tests. Various physiochemical parameters such as, contact time, initial dye concentration, adsorbent dosage, pH of dye solution and temperature were investigated in a batch-adsorption technique. The process followed the pseudo-second order kinetics model which showed chemical adsorption. Langmuir and Freundlich isotherm models were used to determine adsorption constants. The maximum adsorption capacity at 30°C is 526.31 mg/g. Thermodynamic parameters such as enthalpy change (∆Hº), free energy change (∆Gº) and entropy change (∆Sº) were studied, and the adsorption process of BM was found to be exothermic and spontaneous.
- Published
- 2021