Removal of rose bengal dye using low-cost adsorbent material

Abstract

The adsorption of Rose Bengal dye over activated carbon prepared from Calotropis gigantea was investigated. SEM and FTIR characterization was carried out to evaluate the feasibility of adsorbent. The activated carbon was amalgamated into a polymeric bead and was coated with chitosan to increase the removal efficiency. Adsorption experiments were done at optimized equilibrium conditions and the absorbance was checked at 547 nm to calculate the removal percentage. The adsorption dynamics, isotherm kinetics were evaluated to interpret the removal efficiency of the dye. The rate kinetics were determined through the Ho’s pseudo-second-order model, which fitted perfectly for the present adsorption studies.