Evaluation of the Kinetics of Adsorption of Methylene Blue Dye on Low Cost Ceramic Membranes Characterized with Waste from the Bayer Process

Abstract

This work studied the adsorption kinetics of methylene blue dye on low cost ceramic membranes with tailings characterized from the Bayer process. For this, flat circular membranes were made. The proportions used in the preparation were 35/65 and 50/50 (%, m/m), Red Mud (LV)/Clay (AGL), respectively. The specimens were calcined at three different temperatures (900 C, 950 C and 1000 C). The physical properties of the membranes studied were: Water Absorption (AA), Apparent Porosity (PA), Apparent Density (DA), Linear Shrinkage (RL) and Hydraulic Permeability, as a function of the influence of the sintering temperature in each composition variation. The experimental data of adsorption kinetics were analyzed using pseudo-first, pseudo-second order and Elovich models. From the range studied in the method, it is possible to confirm that the greatest response was using the 65A/35LV membrane at 950C. The study of the kinetic model showed that the model that comes closest to the experimental data is Elovich's.

A Study on the Adsorption of Methylene Blue by Acid-Modified Coal Measures Kaolin

“…De Alencar P et al pressed waste red mud and clay into a film, and then dried and calcined it at different temperatures to form a ceramic film. They demonstrated that the ceramic film calcined at 950 • C presented the highest adsorption capability when used for methylene blue [9]. In addition, Xu Hongliang et al synthesized magnetic kaolin from magnetite and stripped nano-kaolin.…”