Methylene Blue Adsorption from Aqueous Solution Using Rak Waste Adsorbent

Methylene blue dye in the wastewater must be completely removed because it causes problems for the environment. The aim of this study is to evaluate and determine the possibility of using absorbent obtained from the oak as a low-cost adsorbent for the removal of methylene blue from aqueous solution. In these tests, a batch system was used for the absorption process. The effect of pH, adsorbent dosage, and initial concentration of methylene blue, time and temperature as key parameters were evaluated. The Langmuir and Freundlich isotherm models were used to evaluate experimental data. The results that increasing pH increases the removal rate and the highest adsorption was obtained at pH 9. Also the Langmuir isotherm model is better than Freundlich model with data obtained. The thermodynamic study showed that the adsorption process was endothermic and spontaneous (high temperature) in nature. Finally, the results of this study indicate that used absorbent have high efficiency for removal of methylene blue.