Removal of Maxilon Red GRL dye in continuous system adsorption column using waste pine sawdust

Abstract

In this study, the effect of various design parameters on the removal of the Maxilon Red GRL dye, used in textile dyeing, in continuous system adsorption column was investigated using pine sawdust that were pre-treated with sulfuric acid. In each selected study parameter, the values read at certain times for the ratio of the output water concentration to the input concentration (Ct/Ci) were recorded into the graph and the breakthrough curves were drawn. The adsorption capacity (qm) obtained under the best conditions (10 cm bed height, 6 mL/min flow rate and 100 mg/L initial concentration) selected according to breakthrough curve data is 483.32 mg/g. In the latest stage, with a 0.4 M NaOH solution, the applicability of regeneration to the adsorbent bed was examined. The results of the study showed that the adsorbing capacity of the used adsorbent continued for another even after regeneration. Furthermore, the data obtained from the breakthrough curve was adapted to the Adams-Bohart, Thomas, and Yoon-Nelson models. It was understood that compared to other models, the Thomas model was more appropriate for the identification of breakthrough curves.