2.6. Batch kinetic studies
The procedures of kinetic experiments were basically identical
to those of equilibrium tests. The aqueous samples were taken at
preset time intervals, and the concentrations of dye were similarly
measured. All the kinetic experiments were carried out at 30 ◦C.
The amount of sorption at time t, qt (mg/g), was calculated by
qt = (C0 − Ct)V
W (3)
where Ct (mg/L) is the liquid-phase concentrations of dye at any
time.