In this study, we aimed to remove Reactive Blue-160 dye, which has a toxic effect when released to nature, with a cheap adsorbate. Scanning electron microscopy, X-ray diffraction, Thermogravimetry/Differential Thermal Analysis, Harkins-Jura Pore Size - Volume Analysis Brunauer–Emmett–Teller Surface Area Analysis were applied for the characterization of adsorbent. The effects of contact time, pH, adsorbent amount and temperature parameters were examined via adsorption. In pH studies conducted between 2.0 and 10.0, the free pH value was taken as 5.70 because adsorption did not change much. Free solution pH was used in other experiments to keep the cost low.
The adsorption isotherm models widely used in aqueous solutions; The compatibility of Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models with experimental data was investigated. For a kinetic model suitable for experimental data, Pseudo First Order, Pseudo Second Order, Elovich and Intra-Particle Diffusion, models were examined. It was determined that the most suitable isotherm and kinetic models were Freundlich and the Pseudo-Second Order Kinetic model respectively. The maximum adsorption capacity was found to be 11.63 mg.g− 1. In addition, as a result of the thermodynamic analysis, negative values of Gibbs Free Energy change and positive values of enthalpy change showed that the adsorption process took place spontaneously and endothermically.