Synthesis of ZnCl2 Activated Raising Powder of Cotton Fabrics for Acid and Basic Dye Adsorption: A Way to Reuse Cellulosic Wastes for Sustainable Production

Abstract

In this study, Cl Basic Blue 9 (BB9) and Cl Acid Blue 193 (AB193) dyes were used to investigate the color removal efficiency of the carbon-based adsorbent material, ZnCl2-RP, which was obtained by activating the raising powder. The raising powder is a waste material that is generated in considerable amounts from the textile industry. The characterization of ZnCl2-RP was conducted by SEM-EDX, FTIR, XRD and BET analyses. As a result of this study, it was determined that ZnCl2-RP contains 4.15% of Zn. While no significant effect of pH on the adsorption of BB9 dye was observed in the experiments, the highest dye removal efficiency was achieved at pH 3. It was seen that Langmuir Isotherm for both dyes was more suitable than the Freundlich Isotherm and the q(max) values of the BB9 and AB193 dyes were 44.8 mg/g and 37.6 mg/g, respectively. Removal kinetics of both dyes were found in accordance with the pseudo-second order kinetics, and k(2) values for 50 mg/L dye concentration were 45.62 g/mg min and 5.31 g/mg min for BB9 and AB193, respectively. It is concluded that the raising powder generated in the textile industry can be used as a low-cost adsorbent for basic and acid dyes.