A theoretical description for competitive adsorption at the Solid/ Solution interface

Abstract

Wastewaters usually contain several solutes, and the adsorption process for removing pollutants from the solutions is usually competitive. Kinetic modeling of adsorption systems is a useful tool to obtain some information about the behavior of the system at the same time or in the future. The provided rate equations for binary adsorption are in differential form, and their solutions are approximated numerically using computers. In the present work, the kinetics of competitive adsorption at the solid/solution interface is studied. The new equation shows an exponential relation between time and surface coverage. This new equation is the first analytical solution of the kinetics Langmuir model of competitive adsorption. The simulated and experimental data confirm the provided equation is suitable to study the rate of binary adsorption