Investigation of Dye Removal With Adsorbent Obtained by Applying Physicochemical Processes to Lignite Coals in Egirdir Region

In this study, the ability of methylene blue dyestuff to be removed from aqueous solutions by easy-to-find, low-cost and effective materials was investigated. For this purpose, lignite coals in E？irdir region were used as adsorbent. Experimental work was carried out with raw charcoal, treated charcoal with ZnCl2 and charcoal prepared with ZnCl2+sonic wave treatment. Adsorption in work; the effects of mixing speed, pH values, contact time, adsorbent doses and doses with temperature were investigated. The equilibrium data are adapted to Langmuir and Freundlich isotherms. Accordingly, it has been determined that isotherm data are more suitable for the Langmuir model. Adsorption kinetics were found to be consistent with the pseudo-II reaction kinetics model. By evaluating various thermodynamic parameters such as standard enthalpy, entropy and Gibbs free energy change, it has been found that adsorption is feasible, spontaneous and endothermic. It has been observed that ZnCl2 and sonic wave are effective in adsorbent preparation processes. The prepared adsorbents were characterized by SEM images, FTIR spectroscopy and BET surface area analysis. The results of the study showed that the adsorbent prepared are suitable adsorbents for the removal of methylene blue dye material. The results obtained were compared with the results of previous studies and contributions were made for adsorption studies