Author(s): L. Nageswara Rao*, S. Feroz, D. Kamalakar and M. Venkateswara Rao
The studies of adsorption were carried out in batch scale to estimate the different adsorption parameters concerning the efficiencies of dye removal from aqueous solutions. The data obtained from the adsorption of methylene blue on the natural waste material such as algae (dried form). The uptake equilibrium was increased and adsorption percentage was decreased with increasing the initial dye concentration for the adsorbent. The percentage adsorption of dye increases with increasing the adsorbent dosage. The percentage adsorption of dye decreases with increasing particle size. In this work, the effect of temperature on the equilibrium adsorption of Methylene Blue dye from aqueous solution using dried Algae was investigated. The percentage adsorption and dye uptake of dye increases with increasing the temperature of solution. Thermodynamic parameters, such as ?G°, ?H°, and ?S° were calculated using adsorption equilibrium constant obtained from the Langmuir isotherm. The Langmuir isotherm for both the adsorbents proved to be the best adjustment of the experimental data than the Freundlich Isotherm. The results suggested that the Methylene Blue dye on dried Algae was a spontaneous and endothermic process.