| Abstract |
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This analytical paper aimed to evaluate the removal of Methylene Blue dyes from aqueous solution by using plant material from Cassia Auriculata. Batch adsorption studies were carried out by observing the effect of experimental parameters such as pH, contact time, initial concentration of the adsorbate, adsorbent dosage and temperature. Adsorption kinetic data were tested using pseudo-second- order, Elovich model and intra particle diffusion models. The present experimental data were found to follow the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Hurkins-Jura, Halsey, Radlich0-Peterson, Jovanovich and BET isotherm models. Thermodynamic parameters such as Gibbs free energy change (?G0), enthalpy change (?H0) and entropy change (?S0) were investigated. The study confirmed that removal of Methylene Blue dye using activated Cassia Auriculata is found to be favourable and hence it could be used as an adsorbent for the treatment of effluents from various dye industries.
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