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Tay, T., Erdem, M., Ceylan, B., and Karagöz, S. (2012). "Adsorption of methylene blue from aqueous solution on activated carbon produced from soybean oil cake by KOH activation," BioRes. 7(3), 3175-3187.

Abstract

This study presents the adsorption behavior of the methylene blue (MB) dye onto the activated carbon produced from soybean oil cake by chemical activation with KOH at 800 °C. The adsorption isotherms, kinetic models, and thermodynamic parameters of the adsorption were studied. The Langmuir isotherm showed a better fit than the Freundlich isotherm. The adsorption rate was described by pseudo-second-order kinetics. The negative values of ΔG° and the positive values of ΔH° indicate that the adsorption of MB was favored and endothermic.
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