Biosorption of Eriochrome Black T (EBT) onto Pomegranate peel Powder (PPP): Equilibrium and Kinetic Studies

Abstract

Biosorption of EBT molecules from aqueous solutions onto pomegranate peel powder (PPP) have been examined in a batch biosorption process. The biosorption procedure was found to be dependent on biosorbent dose, pH of the solution, initial dye concentration, and contact time. The experimental equilibrium biosorption data were inspected by Langmuir, Freundlich, Temkin and Dubinin ̶ Radushkevic isotherms models. The Langmuir model gave the best fit by higher correlation coefficient( R2 =0.966, it assumes as monolayer adsorption). The maximum biosorption capacities determined from the Langmuir, isotherm models was71.42mg/g, at optimum circumstances. The kinetic studies showed that the biosorption operation of the EBT dye obeyed well pseudo-second-order model. According to the determined biosorption capacity, pomegranate peel powder is considered to be an effective, low cost, and environmentally friendly biosorbent for the removal of EBT dye from aqueous solutions