Batch adsorption of acid blue 113 dye from aqueous solution using surfactant-modified zeolite

In recent years, the application and search of alternative cheap and eco-friendly adsorbents to replace activated carbon was made. It has been a major focus for the removal of dyes from wastewater. In this study, surfactant (cetyltrimethylammonium bromide)-modified zeolite (CTAB-Z) was used for removal of Acid Blue 113 (AB113) from an aqueous solution by adsorption technique. For adsorption study, various parameters were optimized and data were adjusted to three isotherm models: Freundlich, Langmuir and Temkin, in order to determine which presented the best adjustment to the experimental data. Also, kinetics study for adsorption was evaluated using diffusion models, such as pseudo first order kinetic and pseudo second order kinetic models. Results revealed that at AB113 concentration of 10 mg/L, adsorbent dose of 2 g/L, a contact time of 75 min, the AB113 removal reached to about 98.2. Adsorption data fitted best into the Langmuir adsorption isotherm. The maximum monolayer adsorption capacity was 22.75 mg/g. The pseudo second order kinetics best described the kinetics of the adsorption system. The results obtained in this study indicated that CTAB-Z will be an attractive candidate for removing AB113 dye from the dye wastewater. © 2020 Evangelische Verlagsanstalt GmbH. All rights reserved.